Health
One-Rep Max Calculator
Estimate your 1-rep max from a submaximal set using Epley, Brzycki, and Lombardi formulas.
Inputs
One-Rep Max Calculator
Result
Estimated 1RM (avg)
115.5 kg
- Epley
- 116.7 kg
- Brzycki
- 112.5 kg
- Lombardi
- 117.5 kg
How it's calculated
Epley: 1RM = w(1 + r/30). Brzycki: 1RM = w · 36/(37 − r). Lombardi: 1RM = w · r^0.10.
Common questions
Should I actually try my 1RM?
No — estimating from a 3–6 rep set is safer and nearly as accurate. Use these numbers to plan working sets at percentages of 1RM.
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