One-Rep Max Calculator
Estimate your one-rep max from a weight and rep count.
Estimated One-Rep Max
126.7 kg
Formula
1RM = Weight × (1 + Reps ÷ 30) — the Epley formula
This is an estimate based on a standard formula — actual results vary by individual fitness and testing conditions.
Frequently Asked Questions
What is the estimated one-rep max for 100kg for 8 reps?
126.7 kg.