One-Rep Max Calculator
Estimate your weightlifting one-rep max
Weight Lifted
What is One-Rep Max Calculator?
The One-Rep Max Calculator estimates the heaviest weight you can lift for one rep, based on a lighter set you've already done. It runs your numbers through Epley, Brzycki, and Lombardi formulas so you don't have to risk a true max attempt.
How to use
- Enter the weight you lifted and the number of reps you completed in your set.
- Select your preferred estimation formula or compare results across all formulas.
- View your estimated 1RM along with percentage-based training loads for programming your workouts.
Result
You bench pressed 185 lbs for 6 reps. Using the Epley formula, your estimated 1RM is approximately 216 lbs. You can then plan training sets at 70% (151 lbs) for hypertrophy or 90% (194 lbs) for strength.
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