Terms of Service

Last updated: 2026

Using this site

Lift Max Calc provides free strength-training calculators -- one-rep max estimates, percentage tables, plate loading, and bodyweight-normalized scores -- for educational and informational use. No account or sign-up is required, and there is no charge to use any page on this site.

Not a substitute for testing a real max, or for coaching

The one-rep max estimates on this site use standard, published formulas (Epley, Brzycki, Lombardi, O'Conner, and Wathan) applied to a submaximal weight and rep count you provide -- they are estimates, not a tested maximum and not a guarantee you can safely lift the number shown. Strength standards are a commonly published community reference, not a scientific study or a certified grade. Wilks and DOTS scores use published federation-style coefficients but are not official competition scoring. Nothing on this site is medical, nutritional, or personal training advice. Attempt any heavy lift, especially anything approaching a true maximum, only with proper form, appropriate safety equipment (spotters or safety bars), and if you have an underlying health condition, after talking to a doctor.

No warranty

This site is provided "as is," without warranty of any kind, express or implied, including but not limited to accuracy, reliability, or fitness for a particular purpose. Use of any calculator or content on this site, and any training decision you base on it, is at your own risk.

Limitation of liability

To the fullest extent permitted by law, Lift Max Calc and its operator are not liable for any loss, injury, or damage arising from use of, or reliance on, this site or its content, including any lift attempted based on a number shown here.

Advertising

This site may display ads served by Google AdSense and other third-party advertising networks. See the Privacy Policy for details on how those networks use cookies and similar technologies.

Content

The text, design, and code on this site belong to Lift Max Calc unless otherwise noted. You're welcome to link to any page here; please don't republish or scrape the content wholesale without permission.

Changes

These terms may be updated from time to time. Continued use of the site after a change means you accept the updated terms.

Contact

Questions about these terms? Reach out at hello@liftmaxcalc.com.