One Rep Max Calculator
Estimate your one-repetition maximum (1RM) for weightlifting
One Rep Max Calculator
Enter your details below and get instant results
One Rep Max Calculator
Calculate your estimated one-rep max based on the weight you can lift for multiple reps. Uses the Epley formula.
How to Use
- Enter the weight you lifted
- Enter the number of reps performed (1-12)
- Click Calculate to see your estimated 1RM
Formula
1RM = W × (1 + R/30) [Epley Formula]
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