Health & Fitness
One Rep Max Calculator
Estimate your 1RM from a lift and reps, with a full percentage-of-max training table.
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About the One Rep Max Calculator
The One Rep Max Calculator is an online tool from Mytulify. Estimate your 1RM from a lift and reps, with a full percentage-of-max training table. It runs entirely in your browser — fast, private, and unlimited on the Free plan. No account or installation needed.
Frequently asked questions
Is the One Rep Max Calculator free to use?
Yes. One Rep Max Calculator is free on our Free plan — unlimited use, no signup, and no watermark. Browser tools never require payment.
Is my data safe with the One Rep Max Calculator?
Absolutely. One Rep Max Calculator runs entirely in your browser — your data is never uploaded to any server.
How does the One Rep Max Calculator work?
Estimate your 1RM from a lift and reps, with a full percentage-of-max training table. Just enter your input and the result is generated instantly on your device.