Free gym calculators

Quick answers for the numbers you need between sets. No sign-up.

Enter the weight and reps of a hard set to estimate your 1RM, with a chart of weights from 50 to 100 percent.

Enter your target weight and bar to see exactly which plates go on each side, in kilograms or pounds.

Enter your working weight to get warm-up sets that ramp from the empty bar, so you feel ready without getting tired.