Disclaimer

Last updated: October 20, 2026

Please read this page before you use the calculators or act on anything you read on 1repmaxcalculator.org. By using the site, you accept this disclaimer.

Results are estimates only

Every number the calculators show, including your estimated one rep max, rep maxes, percentages, warm-ups, strength levels and scores, is an estimate based on published formulas. Your real ability on a given day depends on technique, sleep, stress, nutrition, injury history and many other things a calculator cannot see.

Not medical, fitness or professional advice

The content on this site is general information for educational purposes. It is not medical advice, fitness advice, physiotherapy or any other professional advice, and it does not create a coach and athlete or doctor and patient relationship.

Talk to a professional first

Speak to a doctor before starting heavy lifting, especially if you have a medical condition, an injury, high blood pressure, or you are pregnant. A qualified coach can check your technique and plan your training safely.

Lift safely

  • Warm up properly before heavy sets.
  • Use a spotter, safety pins or safety arms for squats and bench press.
  • Stop a set if your form breaks down or you feel sharp pain.
  • Never attempt a true max you are not prepared for.

No guarantee of accuracy

We work hard to keep the calculators and guides correct, but we cannot promise that every result or statement is complete, accurate or up to date. The site is provided “as is” and errors can happen.

Use at your own risk

You are responsible for how you use the information and results on this site. To the fullest extent allowed by law, we are not liable for any injury, loss or damage that results from using the calculators or relying on the content.

External links

Some pages link to other websites, for example research papers or sport organisations. We do not control those sites and are not responsible for their content, accuracy or privacy practices. A link is not an endorsement.

Advertising and affiliate links

The site does not currently show ads or use affiliate links. In the future we may show ads, including ads served by Google, or include affiliate links to products we think are useful. If we do, we may earn a small commission at no extra cost to you, and this will never change the results the calculators give you.

Questions

If you have a question about this disclaimer, please contact us.