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One Rep Max Calculator
Estimate your one-rep max from a submaximal set using 6 proven formulas. Get a percentage chart for programming.
Your Lift
Estimated 1RM (Average)
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lbs
Results by Formula
Epley
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Brzycki
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Lander
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Lombardi
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Mayhew
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O'Conner
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Percentage Chart
| % | Weight | ~Reps | % | Weight | ~Reps |
|---|
About This Calculator
These formulas estimate your theoretical one-rep max from submaximal efforts. They are most accurate with 2-10 reps. The Epley and Brzycki formulas are the most widely used. Always use a spotter when attempting true maximal lifts.