Training & Performance
One-Rep Max
Calculator
Calculate your estimated maximum lift without the risk of a maximal effort. Our 1RM tool uses the Epley formula for precise strength estimation.
1RM Calculator
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Estimated 1RM (kg)
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What Is a One-Rep Max?
A One-Rep Max (1RM) is the maximum amount of weight you can lift for a single repetition of a given exercise. It is widely considered the gold standard for measuring absolute strength in exercises like the squat, bench press, and deadlift.
Why Use a Calculator?
Testing your 1RM can be physically demanding and carries a higher risk of injury, especially for beginners. A 1RM calculator allows you to estimate your max based on sub-maximal efforts (e.g., how many reps you can do with a lighter weight). This information is crucial for programming percentage-based training blocks.