One Rep Max Calculator
Calculate your one-rep max for weightlifting
kg
Formula
Brzycki: 1RM = W × 36/(37-R)
Estimates the maximum weight you can lift for one repetition based on submaximal performance.
Examples
100kg × 5 reps
1RM ≈ 112-117 kg.
Frequently Asked Questions
About One Rep Max
Calculate your one-rep max from submaximal lifting performance.
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