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Free fitness tool

One Rep Max (1RM) Calculator

Estimate your one-rep max for bench, squat or deadlift from any set of 2–12 reps, plus a percentage chart for programming.

70.8kg
Estimated 1RM
% 1RMWeight≈ Reps
95%67.3 kg2
90%63.7 kg4
85%60.2 kg6
80%56.6 kg8
75%53.1 kg10
70%49.6 kg12
65%46 kg15
60%42.5 kg20

Estimates for healthy adults — not medical advice. Consult a doctor if you have a medical condition.

Frequently asked

Is it safe to test a true 1RM?+

Only with experience and a spotter. Estimating from a 3–8 rep set is safer and accurate enough for programming.

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