Section 1
Fitness and Health Information Disclaimer
1.1 Not Medical Advice
Everything on this site — calculator results, guides, articles, and strength standards — is provided for informational and educational purposes only. None of it is medical advice, a clinical diagnosis, or a professional fitness prescription. It is not a substitute for guidance from a licensed physician, a physical therapist, a certified strength and conditioning specialist (CSCS), or another qualified professional.
If you have an existing injury, a medical condition, a cardiovascular concern, or any health situation that may affect your ability to train safely, consult a qualified professional before beginning or changing any exercise program. Do not disregard professional medical advice because of something you read on this site.
1.2 Individual Results Vary
Strength, training progress, and injury risk differ from person to person. Age, training experience, genetics, body composition, health, sleep, nutrition, and recovery all affect what any individual lifter can safely do and achieve. No result, standard, or benchmark shown on this site should be taken as a personal prediction, a guarantee, or a target that applies to everyone.
1.3 Exercise Involves Risk
Strength training carries inherent physical risk. Maximal and near-maximal efforts, including one-rep max testing, carry a higher risk of injury than submaximal training. This site strongly recommends a structured warm-up before any heavy lifting, qualified coaching for anyone new to barbell training, appropriate safety equipment (a power rack, safety pins, and collars), and a spotter for all heavy bench press and squat attempts.
This site accepts no liability for any injury, loss, or damage resulting from the application of information or calculator results found here. By using this site, you accept full responsibility for your own safety and training decisions.
Section 2
Calculator Accuracy Disclaimer
2.1 Estimated Results Only
All 1RM estimates on this site are mathematical predictions. They are based on established estimation formulas, including Epley (1985), Brzycki (1993), Lander (1985), Lombardi (1989), Mayhew (1992), O’Conner (1989), and Wathan (1994). They are not direct physical measurements — no formula can measure your strength, it can only estimate it from the set you entered.
Your actual one-rep max depends on your technique, accumulated fatigue, the equipment you use, the testing conditions, the time of day, and your training history. No formula fully accounts for all of these variables. Treat every estimate as a working approximation, not a definitive number.
The same applies to the other tools here. RPE-based estimates depend on how honestly you rate a set. Wilks and DOTS scores are formula outputs that compare totals across bodyweights — they describe a number, not your worth as a lifter, and they change if the formula version changes.
2.2 Formula Limitations
Each formula was built from a specific group of lifters, tested under specific conditions. No single formula performs equally well across all rep ranges, training ages, and exercises. Estimates rep from input sets above 10 reps are less reliable across all formulas, because muscular endurance starts to influence the result more than raw maximum strength does.
Use estimates from 3 to 5 rep input sets where possible. Where a tool shows more than one formula, run the calculation across them and treat the spread as your confidence range, rather than picking one number as definitive.
2.3 Not a Substitute for Proper Testing
For competitive powerlifters, strength athletes, or anyone who needs a verified maximum for competition or clinical assessment, a supervised testing session following a structured protocol is the appropriate standard. The calculators on this site support training planning and programming. They do not replace a properly executed, supervised max attempt.
Section 3
Content Accuracy and Updates
3.1 Best Efforts to Be Accurate
The guides on this site are written using published research from recognized sources, including the NSCA, the ACSM, and peer-reviewed sports science literature, alongside established coaching frameworks and practical training experience. We make every reasonable effort to ensure the information is accurate at the time of writing.
Exercise science evolves. An article published today may not reflect the most current research by the time you read it. Where possible, we update older content, but we cannot guarantee that every page on the site reflects the most recent available evidence at all times.
3.2 No Warranty of Completeness
This site makes no warranty, express or implied, that its content is complete, current, or free of errors. All information is provided “as is” for general educational use. Readers are encouraged to cross-reference content with qualified coaches, certified professionals, and current literature before making significant training decisions based on what they read here.
Section 4
External Links Disclaimer
Some pages may link to outside resources for reference. These links are provided as a convenience to readers. We do not control, endorse, or take responsibility for the content, accuracy, availability, or privacy practices of any external website. Following an external link means you are leaving this site and are subject to the policies of the destination site.
Section 5
Advertising Disclaimer
This site displays third-party advertisements served by Google AdSense and, where applicable, other advertising networks. The advertisements shown on this site are not created, reviewed, or endorsed by this site. Ad content is controlled entirely by the advertiser and the ad network. The presence of an advertisement on this site does not constitute a recommendation or endorsement of the advertised product or service.
Section 6
Affiliate Links
At present, this site does not take part in any affiliate program, and no links on this site earn us a commission. If affiliate links are added in the future, this section will be updated to name the programs. Any commission from an affiliate link would be paid by the seller, at no additional cost to you, and affiliate relationships would never influence the editorial content of this site — including guides, calculator results, formula explanations, or strength standards. Recommendations are based on relevance and accuracy, not on commercial relationships.
Section 7
Limitation of Liability
To the maximum extent permitted by applicable law, onerepmaxcalculators.site accepts no liability for any direct, indirect, incidental, consequential, or punitive loss or damage of any kind arising from your use of this site, its content, its calculator tools, or any third-party content linked from this site.
This includes, but is not limited to, physical injury from following training information, financial loss from decisions made based on content on this site, or any loss arising from reliance on calculator estimates. Use of this site constitutes acceptance of this limitation.
Section 8
Contact
If you have questions about this disclaimer or want to report an inaccuracy,
email us at [email protected].
Website: onerepmaxcalculators.site