One Rep Max Calculator

Enter any working set and get your estimated 1RM plus a full percentage breakdown for programming your training.

Free, no sign-up. Your numbers in, a clear target out.

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Estimate Your One Rep Max

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Enter your working set

Most accurate for 1-10 reps.

Go deeper

Want to understand how to apply these numbers?Progressive overload is the principle that turns these percentages into long-term strength gains.Read

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