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Free Calculator

1 Rep Max Calculator

Estimate your max strength from a set you've already done. Enter the weight and reps (2-12 reps work best).

Estimated One-Rep Max

— kg

Training Load Chart

%1RMWeightRepsTraining Zone
Most accurate with 2-10 reps. Single reps (true 1RM testing) requires proper warm-up and a spotter. These are estimates.
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