Bench Press 1RM Calculator

4 formulas • kg/lb • Live update • Ajax loading

Live

🏋️ Weight lifted

Enter the weight you lifted for a set. Then enter reps.

🔁 Reps

Most formulas are reliable for 1–10 reps (some up to ~12).

Quick summary

Enter weight and reps to estimate your 1RM.

Epley

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Brzycki

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Lombardi

—

O’Conner

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Average estimate

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Average of all formulas (use as a practical single number).

Updating…

Hard reset: cancels pending updates and clears everything on the first click.

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