Free heart rate zone calculator
Heart Rate Zone Calculator
A heart rate zone calculator turns two simple numbers, age and resting heart rate, into a full set of training zones. A runner, a cyclist, or anyone starting a cardio routine can see exactly how hard each workout should feel, and which zone builds endurance, burns fat, or rep gym max, or pushes speed.
- Calculate heart rate zones in seconds
- Personalized heart rate zones by age and resting heart rate
- Karvonen formula and 220 minus age, side by side
- Fat burning heart rate zone, Zone 2, and threshold work
No login, no app to install. A person enters an age and a resting heart rate, and the tool returns every zone with its beats-per-minute range.
Heart Rate Zone Calculator
Enter measured values to calculate reference heart-rate ranges.
| Zone | HRR range | Heart rate |
|---|
These are mathematical reference ranges using the heart-rate-reserve method, not medical advice or exercise targets. Heart-rate readings can vary. Ask a qualified health professional if you have questions about what is appropriate for you.
The basics
What Are Heart Rate Zones?
Heart rate zones are five bands of effort, each defined as a percentage of a person’s maximum heart rate. The bands turn a single number on a watch into training guidance: a low zone means a body can talk in full sentences and keep going for hours, while a top zone means a body can only hold the effort for a few minutes. Coaches have used this system for decades because it works for almost any cardio sport, from running and cycling to rowing and swimming.
A heart rate zone chart makes the idea concrete. Zone 1 sits at 50 to 60 percent of maximum heart rate, Zone 2 at 60 to 70 percent, Zone 3 at 70 to 80 percent, Zone 4 at 80 to 90 percent, and Zone 5 at 90 to 100 percent. Each zone trains something different, and a balanced week touches several of them instead of living in one. The table below shows the five zones for a person with a maximum heart rate of 180 beats per minute, which is the estimate for a 40-year-old using the 220 minus age formula.
| Zone | % of maximum heart rate | Beats per minute (max 180) | How it feels | What it trains |
|---|---|---|---|---|
| Zone 1 — Recovery | 50–60% | 90–108 | Very easy, full conversation | Recovery and warm-up |
| Zone 2 — Aerobic base | 60–70% | 108–126 | Easy, full sentences | Fat oxidation and endurance |
| Zone 3 — Tempo | 70–80% | 126–144 | Comfortably hard, short sentences | Aerobic power and stamina |
| Zone 4 — Threshold | 80–90% | 144–162 | Hard, a few words at a time | Lactate threshold and speed |
| Zone 5 — Maximum | 90–100% | 162–180 | Very hard, almost no talking | VO2 max and top speed |
The same percentages apply at any age, because the zones are relative. A 25-year-old and a 60-year-old both do their easy runs in Zone 2, even though their beats-per-minute ranges look nothing alike. That is why a heart rate training calculator asks for age first: the zones are personal, and a single chart cannot fit every body. Heart rate training zones are simply another name for these bands, and training intensity zones means the same thing: five levels of effort, each with its own purpose. The heart rate zone percentages stay the same in every system, whether a coach counts five zones or six.
A heart rate zone formula can also build the zones from heart rate reserve instead of maximum heart rate alone. The Karvonen formula does exactly that, and it usually gives slightly higher zone ranges than the percentage-of-maximum method, because it accounts for resting heart rate. Both methods appear later on this page, with the same worked example, so the difference is easy to see.
Zone by zone
The Five Heart Rate Zones, Explained
Each zone has a job. A training plan that respects all five builds a bigger engine, a higher threshold, and a faster finish, while a plan that lives in one zone stalls. The sections below walk through the zones one at a time, with the beats-per-minute range for a 40-year-old with a maximum heart rate of 180.
Zone 1 Heart Rate: Recovery
A Zone 1 heart rate sits at 50 to 60 percent of maximum heart rate, or 90 to 108 beats per minute for the 40-year-old example. The effort feels almost too easy, and that is the point. Zone 1 is the heart rate recovery zone: it raises blood flow after a hard day, warms the body up before a workout, and cools it down after one. A recovery run stays here, and so does a gentle walk. A person who feels guilty for going this slowly is usually the person who needs it most.
Zone 2 Heart Rate: The Aerobic Base
A Zone 2 heart rate sits at 60 to 70 percent of maximum heart rate, or 108 to 126 beats per minute in the example. This is the aerobic heart rate zone, and it does the quiet work that every other zone depends on. Long, easy running lives here, and so does most of a well-built training week: coaches often prescribe around 80 percent of weekly volume in Zones 1 and 2. The body burns a high share of fat for fuel at this intensity, which is why Zone 2 is also called the fat burning heart rate zone, and the same easy pace builds the aerobic base that carries a runner through a marathon. The talk test works well here: full sentences, steady breathing, no gasping.
Zone 3 Heart Rate: Tempo
A Zone 3 heart rate sits at 70 to 80 percent of maximum heart rate, or 126 to 144 beats per minute in the example. The effort feels comfortably hard, and conversation shrinks to short sentences. Tempo runs live here, and the zone builds aerobic power: the body learns to hold a strong pace for longer. The risk with Zone 3 is that it feels productive, so many runners spend too much time here and too little in Zone 2 or Zone 4. A little tempo work goes a long way, and it works best when the easy days stay genuinely easy.
Zone 4 Heart Rate: Threshold
A Zone 4 heart rate sits at 80 to 90 percent of maximum heart rate, or 144 to 162 beats per minute in the example. This is the lactate threshold heart rate range, the effort where lactate starts to accumulate faster than the body can clear it. Threshold runs and tempo intervals live here, and the zone raises the ceiling on how fast a person can run before fatigue takes over. High threshold training belongs in small, planned doses: one or two sessions a week is plenty, with easy days between them. A threshold effort feels hard but controlled, and a runner can usually hold it for 20 to 40 minutes.
Zone 5 Heart Rate: Maximum Effort
A Zone 5 heart rate sits at 90 to 100 percent of maximum heart rate, or 162 to 180 beats per minute in the example. The effort is very hard, talking is nearly impossible, and the body can only hold it for a few minutes at a time. Zone 5 is the VO2 max training zone, where the body works at its maximum capacity to use oxygen. Interval training and sprint work live here, and the zone drives VO2 max improvement: the body’s maximum capacity to use oxygen. Speed and sprint training in Zone 5 makes a runner faster, but the zone is also the most demanding to recover from, so it appears in short intervals with full rest, never as a steady slog.
Zone 6 Heart Rate: Above Maximum
A Zone 6 heart rate appears in some six-zone systems, and it covers efforts above 100 percent of the estimated maximum, the kind of all-out sprint a person can hold for seconds rather than minutes. Most runners never need a Zone 6, because the standard five zones cover every training goal, from recovery to racing. A coach who uses six zones usually splits the top end to separate short sprints from longer VO2 max intervals, and the heart rate reserve zones in such a system shift slightly to make room. For most people, five zones are enough, and the calculator on this page uses the five-zone model.
The method
How to Calculate Heart Rate Zones
A heart rate zone calculation method needs only three inputs: age, resting heart rate, and a formula. The steps below show the full process, and the worked example after them runs the numbers for a 40-year-old with a resting heart rate of 60 beats per minute.
- Measure resting heart rate. A person checks it first thing in the morning, before getting out of bed, on three separate days, and takes the lowest reading. A chest strap or a watch works; a quick finger check on the wrist for 30 seconds, doubled, works too. To calculate resting heart rate well, the body should be calm, rested, and free of caffeine. A resting heart rate calculator takes three morning readings and returns the lowest, which is the number the zones need.
- Find maximum heart rate. A formula estimates it from age, since a true maximum test is a hard, all-out effort. The 220 minus age formula is the simplest estimate, and the Tanaka formula is a slightly more accurate alternative. Both appear in the next section.
- Pick a method. The percentage-of-maximum method multiplies maximum heart rate by each zone’s percentage. The heart rate reserve method, also called the Karvonen formula, starts from resting heart rate and adds a percentage of the reserve. A personalized heart rate zones result comes from the second method, because it accounts for fitness: two people of the same age with different resting heart rates get different zones. A personalized training zone calculator adjusts the result for fitness, so two people of the same age get different zones when their resting heart rates differ.
- Apply the percentages. Zone 1 uses 50 to 60 percent, Zone 2 uses 60 to 70 percent, and so on up to Zone 5 at 90 to 100 percent. A Karvonen formula calculator does this arithmetic in one step, but the manual version takes less than a minute. The result is a set of target heart rate zones, one range for each zone, and a runner trains by holding the heart rate inside the target range for that session.
Worked Example: A 40-Year-Old With a Resting Heart Rate of 60
Maximum heart rate by the 220 minus age formula is 220 minus 40, which is 180 beats per minute. The Tanaka formula gives the same answer here: 208 minus 0.7 times 40 is 208 minus 28, which is also 180. Heart rate reserve is maximum minus resting, so 180 minus 60 is 120 beats per minute of reserve to work with.
The Karvonen formula then builds each zone from that reserve. Zone 2, at 60 to 70 percent of reserve, is 60 plus 0.60 times 120, which is 132, up to 60 plus 0.70 times 120, which is 144. So the Karvonen Zone 2 is 132 to 144 beats per minute. By comparison, the percentage-of-maximum method gives Zone 2 as 60 to 70 percent of 180, which is 108 to 126 beats per minute. The Karvonen range sits higher because it starts from a resting heart rate of 60 instead of zero, and that gap is exactly why fitter people, with lower resting heart rates, get wider and higher zones from the Karvonen method.
| Zone | Karvonen (heart rate reserve) | Percentage of maximum heart rate |
|---|---|---|
| Zone 1 | 120–132 bpm | 90–108 bpm |
| Zone 2 | 132–144 bpm | 108–126 bpm |
| Zone 3 | 144–156 bpm | 126–144 bpm |
| Zone 4 | 156–168 bpm | 144–162 bpm |
| Zone 5 | 168–180 bpm | 162–180 bpm |
The table shows both methods side by side for the same person, and the pattern holds for everyone: the Karvonen zones run higher, and the gap grows as resting heart rate falls. A runner who trains by feel can use either method, but a runner who trains by the numbers should pick one method and stay with it, because switching methods mid-season moves every target. The most accurate heart rate zone calculation is the one that uses a measured resting heart rate and a measured maximum or threshold, rather than an age estimate, and the accuracy section near the end of this page explains how close each estimate gets.
The formulas
Heart Rate Zone Formulas: Karvonen, Tanaka, and 220 Minus Age
Three formulas do almost all the work in heart rate training, and each one answers a different question. Every max heart rate formula is an estimate, not a measurement, and a maximum heart rate calculator simply runs one of these formulas for a given age. A maximum heart rate formula such as 220 minus age or Tanaka gives the top number for the zones. The 220 minus age formula and the Tanaka formula estimate maximum heart rate, while the Karvonen formula turns maximum and resting heart rate into training zones. A fourth approach, the lactate threshold method, skips maximum heart rate entirely and builds zones from the threshold instead.
220 Minus Age Formula
The 220 minus age formula is the oldest and simplest maximum heart rate formula: maximum heart rate equals 220 minus age. A 30-year-old gets 190 beats per minute, and a 50-year-old gets 170. The formula is easy to remember and good enough for a first set of zones, but it is a population average, and an individual can sit 10 to 12 beats per minute above or below it. To calculate maximum heart rate more precisely, a person needs a lab test or a field test, not a better formula.
Tanaka Formula
The Tanaka formula estimates maximum heart rate as 208 minus 0.7 times age. A 30-year-old gets 208 minus 21, which is 187 beats per minute, and a 50-year-old gets 208 minus 35, which is 173. Compared with 220 minus age, the Tanaka formula gives slightly lower numbers for young adults and slightly higher numbers for older adults, and research has found it a little closer to measured values on average. The table below compares the two formulas across the ages.
| Age | 220 minus age | Tanaka formula |
|---|---|---|
| 20 | 200 bpm | 194 bpm |
| 30 | 190 bpm | 187 bpm |
| 40 | 180 bpm | 180 bpm |
| 50 | 170 bpm | 173 bpm |
| 60 | 160 bpm | 166 bpm |
| 70 | 150 bpm | 159 bpm |
Karvonen Formula and the Heart Rate Reserve Method
The Karvonen formula is the heart rate reserve method in equation form: target heart rate equals resting heart rate plus a percentage of heart rate reserve, where heart rate reserve equals maximum heart rate minus resting heart rate. A Karvonen formula calculator takes age and resting heart rate and returns the zones. To calculate heart rate reserve, a person subtracts resting heart rate from maximum heart rate, and a heart rate reserve calculator does the same subtraction before applying the percentages. A heart rate reserve formula explained in one line reads like this: a person with a maximum of 180 and a resting rate of 60 has a reserve of 120, so 70 percent effort is 60 plus 0.70 times 120, which is 144 beats per minute. The Karvonen formula calculator on this page uses this method, because it personalizes the zones: a fit person with a resting heart rate of 45 gets different zones from an unfit person of the same age with a resting heart rate of 75, even though their maximum heart rates match.
Lactate Threshold Method
The lactate threshold method builds zones from lactate threshold heart rate instead of maximum heart rate. A runner finds the threshold with a 30-minute time trial, takes the average heart rate of the last 20 minutes, and treats that number as the threshold. Lactate threshold training zones then sit below and above it: easy running well under threshold, tempo work just under it, and intervals above it. The method is more accurate than any age formula, because it measures what the body actually does, and it is the method most coaches prefer for experienced runners. A lactate threshold heart rate calculator builds zones from a time-trial result instead of an age formula, which is why coaches trust it more for experienced runners.
Which Formula Should a Person Use?
A beginner gets the best return from the simplest path: 220 minus age for maximum heart rate, and the percentage-of-maximum method for the zones. A person with a watch and a known resting heart rate gets better zones from the Karvonen formula, because it adjusts for fitness. A competitive runner who wants the most accurate heart rate zone calculation should test the lactate threshold and build zones from it. Resting heart rate and maximum heart rate together decide the answer, and the calculator on this page takes both, so the zones it returns are already personalized.
By age
Heart Rate Zones by Age
Age based heart rate zones move down as the years pass, because maximum heart rate falls by roughly one beat per year. Maximum heart rate by age is the number that drives the whole table: a 20-year-old near 200 beats per minute, a 60-year-old near 160. Any maximum heart rate formula gives the same table with slightly different numbers. A 20-year-old and a 60-year-old do the same kinds of training, but their numbers differ by 40 beats per minute, and a chart that ignores age misleads both of them. The table below shows the maximum heart rate and the Zone 2 range for each decade, using the 220 minus age formula and the percentage-of-maximum method.
| Age | Maximum heart rate | Zone 1 (50–60%) | Zone 2 (60–70%) | Zone 3 (70–80%) | Zone 4 (80–90%) | Zone 5 (90–100%) |
|---|---|---|---|---|---|---|
| 20 | 200 bpm | 100–120 | 120–140 | 140–160 | 160–180 | 180–200 |
| 30 | 190 bpm | 95–114 | 114–133 | 133–152 | 152–171 | 171–190 |
| 40 | 180 bpm | 90–108 | 108–126 | 126–144 | 144–162 | 162–180 |
| 50 | 170 bpm | 85–102 | 102–119 | 119–136 | 136–153 | 153–170 |
| 60 | 160 bpm | 80–96 | 96–112 | 112–128 | 128–144 | 144–160 |
| 70 | 150 bpm | 75–90 | 90–105 | 105–120 | 120–135 | 135–150 |
A heart rate zone calculator by age does this table in one step, and adding resting heart rate makes it better: a heart rate zone calculator by age and resting heart rate uses the Karvonen formula, so two 40-year-olds with resting rates of 55 and 70 get different zones even though their maximum heart rates match. A heart rate zone calculator by age and resting heart rate is the most personal version of the tool, because it asks for both numbers. The calculator on this page asks for both numbers for exactly that reason.
Heart Rate Zones by Gender
Heart rate zones by gender work the same way for men and women, because the formulas use age and resting heart rate, not sex. Average maximum heart rates differ slightly between men and women at the same age, and average resting heart rates differ too, but those differences are small next to the spread between individuals. A heart rate zone calculator by age and gender gives the same zones for a man and a woman of the same age and resting heart rate, and that is correct: the zones describe effort, and effort does not depend on gender.
Heart Rate Zones by Fitness Level
Heart rate zones by fitness level shift with training, and resting heart rate is the number that shows it. A beginner often rests near 75 beats per minute, while a trained runner rests near 50, and that gap changes the Karvonen zones by a wide margin. Running fitness levels also show up in heart rate recovery: a fit person drops 20 or more beats in the first minute after stopping, while an unfit person drops far less. As fitness improves, resting heart rate falls, the zones widen, and the same pace costs fewer beats per minute, which is the clearest sign that training is working.
Running
Heart Rate Training for Runners
Running heart rate training turns a watch into a coach. A running heart rate calculator gives a runner the same zones in beats per minute, so every session has a number to hold. Running heart rate zones give a runner the same five bands, with numbers that fit running. Instead of guessing whether a run is easy or hard, a runner checks the zone and knows. The running heart rate zones below cover every session in a normal week, from the slowest recovery jog to the fastest sprint, and each one has a heart rate range and a purpose.
Easy Run Heart Rate
An easy run heart rate sits in Zone 2, at 60 to 70 percent of maximum heart rate. An easy running heart rate stays conversational from start to finish, and a runner who cannot talk is running too hard for an easy day. The run feels relaxed, breathing stays steady, and the runner could hold a conversation the whole way. Easy runs build the aerobic base, and they make up most of a healthy week. A heart rate calculator for runners keeps these runs honest, because the most common mistake in running is doing easy runs too fast.
Long Run Heart Rate
A long run heart rate also lives mostly in Zone 2, with brief climbs into Zone 3 on hills. The long run is the week’s endurance anchor: it teaches the body to burn fat for fuel, to keep good form when tired, and to stay out for hours. A runner who watches the watch on a long run finishes fresher and recovers faster than one who chases pace.
Recovery Run Heart Rate
A recovery run heart rate stays in Zone 1, at 50 to 60 percent of maximum heart rate. The run is short, slow, and almost embarrassingly easy, and its job is to move blood through tired legs after a hard day. A recovery run should never leave a runner more tired than before it, and a heart rate monitor is the best guard against turning recovery into another workout.
Tempo Run Heart Rate
A tempo run heart rate sits in Zone 3, at 70 to 80 percent of maximum heart rate, and a threshold run heart rate sits just above it, at the top of Zone 3 or the bottom of Zone 4. Tempo runs build the ability to hold a strong pace, and threshold runs push the lactate threshold higher. Both sessions feel comfortably hard to hard, last 20 to 40 minutes, and need a proper warm-up and an easy day after them.
Interval Training Heart Rate
An interval training heart rate climbs into Zone 4 and Zone 5, then falls back to Zone 1 or 2 during the rest. The pattern, hard effort followed by recovery, is what improves speed and VO2 max. A typical session is five or six repeats of three minutes hard with two minutes easy, and the heart rate during the hard repeats should reach Zone 4 or low Zone 5. A sprint workout heart rate touches the top of Zone 5 for seconds at a time, with full rest between sprints, and it trains raw speed rather than endurance.
Heart Rate Training for Marathon and 5K
Heart rate training for marathon running lives mostly in Zones 1 and 2, with the long run as the centerpiece and one tempo session a week. Heart rate for distance running stays mostly in Zone 2, with the long run as the week’s main endurance session. A marathon is raced near the top of Zone 2 or the bottom of Zone 3, so most training stays below race effort. Heart rate training for 5K running looks different: the race itself is run in Zone 4 and 5, so training includes more threshold work and intervals, with easy runs still filling the gaps. The same zones serve both distances; only the mix changes.
Heart Rate Training for Beginners
Heart rate training for beginners starts with two rules: most running stays in Zone 2, and no run should leave the body wrecked. A beginner who walks the hills, keeps the easy days easy, and adds one slightly harder session a week builds fitness faster than one who runs hard every day. Endurance training heart rate discipline matters more than speed at this stage, and aerobic base training in Zone 2 is what turns a new runner into a durable one. Running intensity levels feel abstract at first, but after a few weeks with a monitor, a beginner reads the body the way the numbers taught it.
Fat burn
The Fat Burning Heart Rate Zone and Endurance
The fat burning heart rate zone is Zone 2, at 60 to 70 percent of maximum heart rate. At this intensity, fat oxidation supplies the largest share of the body’s fuel, which is why Zone 2 has a reputation as the weight-loss zone. The reputation needs one honest correction: a higher zone burns more total calories per minute, even though a smaller share comes from fat. A person who wants to lose weight should therefore mix Zone 2 volume, which is easy to repeat day after day, with some harder work, which raises total burn. The calculator helps with both, because it shows the Zone 2 range and the higher zones in the same result.
Aerobic fitness grows in Zone 2, and cardiovascular endurance follows it. The heart gets stronger, the body builds more capillaries and mitochondria, and the same pace costs fewer beats per minute over time. To improve running endurance, a runner needs weeks of easy volume more than a few heroic sessions, and to build aerobic engine capacity, the prescription is the same: long, steady, mostly easy work. Aerobic base training is the name coaches give to that easy volume. Endurance running training is patient work, and the heart rate monitor is what keeps it patient.
VO2 max improvement comes from the top zones, especially Zone 5 intervals, while the lactate threshold rises with Zone 4 work. To improve lactate threshold, a runner adds one threshold session a week, and to improve running performance overall, the week needs all of it: easy volume, one tempo, and one interval session, with rest between. Running pace and heart rate move together as fitness changes: the same pace at a lower heart rate means the body has adapted, and training adaptations show up first in the numbers, then in race times.
Heart rate recovery is one of the simplest fitness tests a person owns. After a hard effort, the heart rate should fall quickly: a drop of 20 beats or more in the first minute after stopping is a good sign, and a slow drop is a sign to rest. Sustainable endurance training respects that signal. It keeps most work easy, adds intensity gradually, and treats recovery as part of training rather than the absence of it.
Everyday uses
Heart Rate Zone Calculator for Everyday Goals
A heart rate zone calculator earns its place in daily training because it answers a different question for every person who opens it. A beginner wants to know what easy means, a walker wants to know whether a stroll counts, and a person training at home wants a plan that fits a living room. The list below covers the most common goals, each with the zones that serve it best.
- A heart rate zone calculator for weight loss shows the Zone 2 range where fat supplies the largest share of fuel, plus the Zone 4 intervals that raise total calorie burn.
- A heart rate zone calculator by age and gender gives the same zones for a man and a woman of the same age and resting heart rate, because effort does not depend on gender.
- A heart rate zone calculator for beginners keeps most training in Zone 2, so a new runner builds fitness without getting hurt or burned out.
- A heart rate zone calculator for walking exercise turns a daily walk into training: a brisk walk usually lands in Zone 1 or low Zone 2, which counts as real aerobic work.
- A heart rate zone calculator for improving heart health shows the moderate zones that strengthen the heart, which is the kind of steady work doctors recommend most often.
- A heart rate zone calculator for burning calories compares the zones side by side, so a person can see that harder zones burn more per minute while Zone 2 burns more per week.
- A heart rate zone calculator for daily cardio workouts builds a weekly plan with mostly easy days, one tempo day, and one interval day.
- A heart rate zone calculator for home workouts sets targets for a treadmill, a bike, a rower, or bodyweight circuits, all without a gym.
- A heart rate zone calculator for treadmill walking gives the speed and incline ranges that hold a walker in Zone 2 without breaking into a run.
- A heart rate zone calculator for low intensity exercise confirms that slow work counts: Zone 1 and Zone 2 build the base that every harder session stands on.
- A heart rate zone calculator for daily fitness goals turns a vague aim like move more into a number: 30 minutes in Zone 2, five days a week.
- A heart rate zone calculator for morning workouts sets a gentle target for the first session of the day, when the heart rate runs a little higher than usual.
- A heart rate zone calculator for healthy aging shows how zones shift with age, so a 65-year-old trains at the right effort instead of chasing a younger person’s numbers.
- A heart rate zone calculator for sustainable fat loss pairs Zone 2 volume with a few harder sessions, a mix a person can hold for months rather than weeks.
- A heart rate zone calculator for building endurance naturally lays out the long, easy weeks that raise stamina without supplements or shortcuts.
Walking deserves a special note, because it is the most underrated way to train in the zones. A brisk walk with a hill or two reaches Zone 2 for most people, and a treadmill walker can hold that zone for an hour without joint stress. Home workouts work the same way: a circuit of bodyweight moves with short rests climbs into Zone 3, while a steady bike session holds Zone 2. The zones do not care where the workout happens, only how hard the heart works.
By sport
How Are Running and Cycling Heart Rate Zones Different?
Running and cycling heart rate zones use the same five-zone system, but the numbers differ, because the sports stress the body differently. Maximum heart rate runs a little lower on a bike than on foot for most people, often by 5 to 10 beats per minute, since cycling uses less muscle mass and the body position changes how the heart works. Lactate threshold heart rate also sits lower on the bike, for the same reason.
A runner who copies running zones onto the bike will therefore train too hard on every ride, and a cyclist who copies cycling zones onto a run will train too easy. The fix is simple: test each sport on its own, or subtract roughly 5 to 10 beats from the running zones for cycling. Swimming differs even more, because the horizontal position and the water lower the heart rate further. The calculator on this page gives running zones, and a cyclist should treat the result as a starting point and adjust it after a few rides.
Use it well
When to Use Heart Rate Training, and When Not To
Heart rate training works best when the goal is steady progress: building an aerobic base, losing weight, preparing for a race, or returning from a break. It gives every session a target, and it stops easy days from turning hard. A runner without a heart rate monitor can still train by feel, and a perceived-effort scale gives the same zones in words rather than numbers, which is why an RPE calculator makes a useful backup when the watch is forgotten or the battery dies.
There are times when heart rate training should pause. An illness, a fever, or a hard week of poor sleep raises the heart rate for the same effort, so the zones read too high and the body needs rest instead. Some medicines, especially beta-blockers, lower the heart rate on purpose, which makes the zones meaningless until a doctor advises otherwise. Anyone with a heart condition, chest pain, or dizziness during exercise should stop and see a clinician before training by heart rate at all.
The accuracy of age-based formulas has honest limits, and heart rate training accuracy depends on the inputs as much as on the formula. An age formula estimates maximum heart rate within about 10 to 12 beats per minute for most people, which is close enough for Zone 2 and Zone 3 work but rough for precise threshold training. A chest strap measures the heart more accurately than a wrist sensor, especially during intervals, and a measured resting heart rate beats a guessed one every time. The zones are a guide, not a lab result, and a person who listens to the body alongside the watch gets the best of both.
Quick reference
Heart Rate Zone Chart: Every Zone at a Glance
A heart rate zone chart puts every number in one place. A heart rate zone chart puts every number in one place, and running heart rate zones use the same chart, with the same percentages. The table below shows the five zones with both calculation methods side by side: the percentage of maximum heart rate, and the Karvonen range built from heart rate reserve. The heart rate zone percentages never change, but the beats-per-minute ranges do, so the table uses the worked example from this page: a 40-year-old with a maximum heart rate of 180 and a resting heart rate of 60. The heart rate reserve zones in the Karvonen column run higher, because they start from a resting rate of 60 instead of zero. To calculate heart rate zones for any age, a person reads the row for that age and the column for the chosen method.
| Zone | % of maximum heart rate | Karvonen range (resting 60) | Beats per minute (max 180) | Best for |
|---|---|---|---|---|
| Zone 1 Heart Rate | 50–60% | 120–132 bpm | 90–108 | Heart rate recovery zone, warm-up |
| Zone 2 Heart Rate | 60–70% | 132–144 bpm | 108–126 | Fat burning heart rate zone, aerobic base |
| Zone 3 Heart Rate | 70–80% | 144–156 bpm | 126–144 | Tempo runs, aerobic power |
| Zone 4 Heart Rate | 80–90% | 156–168 bpm | 144–162 | Lactate threshold heart rate work |
| Zone 5 Heart Rate | 90–100% | 168–180 bpm | 162–180 | VO2 max training zone, speed |
An easy running heart rate belongs in the first two rows of the chart, and a hard interval belongs in the last two. The aerobic heart rate zone is Zone 2, the threshold lives in Zone 4, and high threshold training means planned work at the top of Zone 3 and through Zone 4. Speed and sprint training lives in Zone 5, where the effort is short and the recovery is long.
A sample week
A Sample Week of Heart Rate Training
A week of heart rate training shows how the zones fit together. Most days stay easy, one day goes hard, and one day rests. The table below is a starting template for a runner training five days a week, and the mix suits endurance training heart rate discipline at any level. The mix suits running heart rate zones at any level, and endurance training heart rate discipline keeps the easy days easy. Running intensity levels stay honest when the watch, not the mood, sets the effort.
| Day | Session | Zone | Purpose |
|---|---|---|---|
| Monday | Recovery run | Zone 1 | A recovery run heart rate stays low to flush tired legs |
| Tuesday | Intervals | Zone 4–5 | Interval training heart rate climbs high, then recovers |
| Wednesday | Easy run | Zone 2 | An easy run heart rate builds the aerobic base |
| Thursday | Tempo run | Zone 3 | A tempo run heart rate holds a comfortably hard effort |
| Friday | Rest | — | Rest lets training adaptations settle in |
| Saturday | Long run | Zone 2 | A long run heart rate stays mostly easy for endurance |
| Sunday | Easy walk or jog | Zone 1–2 | A gentle session keeps heart rate recovery on track |
A threshold run heart rate session replaces the tempo run in race weeks, and a sprint workout heart rate session adds top speed before a 5K. Heart rate training for marathon runners keeps the long run in Zone 2, while heart rate training for 5K runners adds more threshold work. Heart rate training for beginners follows the same template with shorter sessions, because the pattern matters more than the volume.
Pick a method
Which Method Fits Which Runner?
Every heart rate zone calculation method trades simplicity for accuracy. Every method for building heart rate training zones trades simplicity for accuracy. The table below compares the four methods on this page, so a person can pick the one that fits. The most accurate heart rate zone calculation uses a measured threshold, while the simplest uses age alone, and heart rate training accuracy rises with better inputs at every step.
| Method | What it needs | Best for | Accuracy |
|---|---|---|---|
| 220 Minus Age Formula | Age only | First zones | Rough estimate |
| Tanaka Formula | Age only | A better estimate | Slightly better |
| Karvonen Formula | Age and resting heart rate | Personalized zones | Good |
| Heart Rate Reserve Method | Age and resting heart rate | Personalized zones | Good |
| Lactate Threshold Method | 30-minute time trial | Racers | Best |
| Age Based Heart Rate Zones | Age only | A quick start | Rough |
A maximum heart rate calculator runs the 220 minus age formula or the Tanaka formula, a resting heart rate calculator averages three morning readings, and a heart rate reserve calculator applies the Karvonen formula. A personalized training zone calculator combines all three inputs, and a lactate threshold heart rate calculator uses a time-trial result instead of an age formula. The max heart rate formula a person picks matters less than using measured inputs, and the heart rate reserve formula explained on this page shows the arithmetic step by step.
Two sessions a week
Two Sessions a Week for Each Goal
A goal needs a routine, not just a number. The table below gives every goal two sessions a week, with the zones that serve it. A heart rate zone calculator for weight loss works best with three Zone 2 sessions and one interval session a week, a heart rate zone calculator for beginners starts with three easy sessions, and a heart rate zone calculator by age and gender adjusts the numbers for age first.
| Goal | Session 1 | Session 2 |
|---|---|---|
| Heart rate zone calculator for weight loss | Zone 2 walk or jog, 45 min | Zone 4 intervals, 20 min |
| Heart rate zone calculator by age and gender | Zone 2, 30 min | Zone 2, 30 min |
| Heart rate zone calculator for beginners | Zone 2, 30 min | Zone 1 walk, 20 min |
| Heart rate zone calculator for walking exercise | Zone 1–2 walk, 40 min | Zone 2 walk, 30 min |
| Heart rate zone calculator for improving heart health | Zone 2 bike, 30 min | Zone 3 tempo, 20 min |
| Heart rate zone calculator for burning calories | Zone 3 tempo, 30 min | Zone 5 intervals, 15 min |
| Heart rate zone calculator for daily cardio workouts | Zone 2, 30 min | Zone 2, 30 min |
| Heart rate zone calculator for home workouts | Zone 2 circuit, 30 min | Zone 3 circuit, 20 min |
| Heart rate zone calculator for treadmill walking | Zone 2 walk, 40 min | Zone 1 walk, 30 min |
| Heart rate zone calculator for low intensity exercise | Zone 1 walk, 30 min | Zone 2 easy bike, 30 min |
| Heart rate zone calculator for daily fitness goals | Zone 2, 30 min | Zone 2, 30 min |
| Heart rate zone calculator for morning workouts | Zone 1–2, 20 min | Zone 2, 30 min |
| Heart rate zone calculator for healthy aging | Zone 2 walk, 30 min | Zone 1 gentle bike, 30 min |
| Heart rate zone calculator for sustainable fat loss | Zone 2, 45 min | Zone 4 intervals, 20 min |
| Heart rate zone calculator for building endurance naturally | Zone 2 long session, 60 min | Zone 2, 40 min |
Every goal in the table uses the same zones, and only the mix changes. Two sessions a week is enough to start, and a third session can be added once the first two feel comfortable.
Key terms
Key Terms, Simply Explained
The terms below appear throughout this page, and each one earns its place in a single line. A reader who knows them can read any heart rate zone chart, follow any training plan, and understand what a watch is saying.
| Term | Meaning |
|---|---|
| Heart Rate Training Calculator | A tool that turns age and resting heart rate into training zones. |
| Running Heart Rate Calculator | A heart rate zone calculator tuned for runners, with zones in beats per minute. |
| Heart Rate Zone Formula | Any formula that converts maximum heart rate into zone ranges. |
| Training Intensity Zones | Another name for heart rate zones: five bands of effort. |
| Target Heart Rate Zones | The zone ranges a person aims to hold during a session. |
| Personalized Heart Rate Zones | Zones built from a person’s own age and resting heart rate. |
| Heart Rate Zones by Fitness Level | Zones that shift as resting heart rate falls with training. |
| Heart Rate Zones by Gender | Zones work the same for men and women of the same age and resting rate. |
| Heart Rate Calculator for Runners | A calculator that gives runners their zone ranges in beats per minute. |
| Calculate Maximum Heart Rate | To estimate maximum heart rate from age, with 220 minus age or Tanaka. |
| Calculate Resting Heart Rate | To measure resting heart rate over three quiet mornings. |
| Calculate Heart Rate Reserve | To subtract resting heart rate from maximum heart rate. |
| Heart Rate Reserve Formula | Maximum heart rate minus resting heart rate. |
| Most Accurate Heart Rate Zone Calculation | A calculation that uses a measured resting rate and threshold, not age alone. |
| Heart Rate Zone Calculation Method | The steps that turn age and resting rate into zones. |
| Resting Heart Rate and Maximum Heart Rate | The two inputs every zone calculation needs. |
| Lactate Threshold Training Zones | Zones built around lactate threshold heart rate. |
| High Threshold Training | Work near the lactate threshold that raises it. |
| Speed and Sprint Training | Short, very hard efforts in Zone 5 and above. |
| Fat Oxidation | The body’s use of fat for fuel, highest in Zone 2. |
| Aerobic Fitness | The body’s capacity for steady, oxygen-fed work. |
| Cardiovascular Endurance | The heart and lungs’ ability to sustain effort. |
| Improve Running Endurance | To extend how long a runner can hold a pace. |
| Build Aerobic Engine | To grow the body’s capacity for easy, long work. |
| Improve Running Performance | To run faster or longer at the same effort. |
| Endurance Running Training | Training built on mostly easy volume. |
| VO2 Max Improvement | A rise in the body’s maximum oxygen use. |
| Improve Lactate Threshold | To push the threshold higher so hard paces last longer. |
| Running Fitness Levels | How fit a runner is, shown by resting rate and recovery. |
| Heart Rate Recovery | How fast the heart rate falls after effort stops. |
| Running Pace and Heart Rate | The link between speed and effort at a given fitness. |
| Sustainable Endurance Training | Training a person can hold for months without burnout. |
| Heart Rate for Distance Running | Zone discipline across long races. |
| Heart Rate Training for Marathon | Mostly Zone 2 volume with a weekly long run. |
| Heart Rate Training for 5K | More threshold and interval work for a short, fast race. |
| Heart Rate Training for Beginners | Mostly Zone 2, with one slightly harder session a week. |
| Maximum Heart Rate by Age | Maximum heart rate falls about one beat per year. |
| Aerobic Base Training | Easy Zone 2 volume that builds the body’s aerobic capacity. |
| Maximum Heart Rate by Age | Maximum heart rate falls about one beat per year. |
| Heart Rate Training Accuracy | How close the zones sit to the body’s true thresholds. |
Questions
Frequently Asked Questions About Heart Rate Zones
The questions below cover the terms on this page, from heart rate training zones to the Karvonen formula, and the answers use the same numbers as the tables above.