Disclaimer

Everything on this site is arithmetic. Useful arithmetic, but arithmetic all the same.

Not Medical or Coaching Advice

The calculators produce generic estimates from formulas and conventions, nothing more. They don't know your training history, your joints, your recovery or your health. No result here is medical advice, fitness programming, coaching or a fitting service, and none of it replaces the judgment of a qualified professional who can actually see you.

Estimates Have Error Bars

One rep max formulas are population averages and can miss your true max in either direction. Attempting maximal lifts carries real risk; warm up properly, use spotters and sensible loading, and treat any estimate with suspicion until proven. Pace targets don't account for terrain, heat or how you slept. Bra sizing varies between brands, so a calculated size is a starting point for trying things on, not a guarantee of fit.

Your Responsibility

Decisions you make based on numbers from this site, in the gym, on the road or in a fitting room, are yours. If something health-related is in question, talk to a professional before acting on a calculator.