One Rep Max Calculator
Calculate one rep max with Calculator 360 using the available inputs.
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How to use this calculator
Compare Epley and Brzycki one-rep-max estimates from a weight in pounds or kilograms and 1–12 repetitions. The estimates are not recommended loads to lift.
Choose the relevant mode and units, enter the needed values, and review the result and its stated limits.
Epley and Brzycki are separate estimates; neither prescribes a load to lift. References: Review of 1RM estimation equations ·
Frequently asked questions
What does this tool calculate?
Compare Epley and Brzycki one-rep-max estimates from a weight in pounds or kilograms and 1–12 repetitions. The estimates are not recommended loads to lift.
Which inputs are used?
The calculation uses the values and units you enter in this form.