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One Rep Max Calculator

1RM from a lifted weight and reps.

One rep max

Estimated 1RM
213.8 lb
Epley
215.8 lb
Brzycki
208.1 lb
Lombardi
217.3 lb
One Rep Max Calculator · Generated 4/27/2026 · calcly.app/calculators/health/one-rep-max

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About the One Rep Max Calculator

MethodologyHome

1RM from a lifted weight and reps. Use this free one rep max calculator to get instant results. All calculations run in your browser — nothing is sent to a server.

Frequently asked questions

What does this One Rep Max Calculator do?

1RM from a lifted weight and reps.

Is it free?

Yes — every calculator on Calcly is free, with no sign-up or account required.

Does it work offline?

The site is a Progressive Web App — after your first visit, most pages work without an internet connection.