One-Rep Max Calculator
Estimate your 1RM from any lift and see your full percentage table.
Tip: estimates are most accurate at 1–10 reps. High reps reduce accuracy.
Estimated One-Rep Max
based on × · formula
Formula (tap to use)
% of 1RM · training loads
| % | Weight |
|---|---|
🏋️ Barbell plate loading (per side)
Loads total ( bar + / side) · not loadable with standard plates
1RM is at or below the bar weight — nothing to load. Lower the bar weight to see plates.
Estimates only — actual 1RM varies by exercise, fatigue and technique. Warm up, use a spotter, and progress gradually. Not medical advice.
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