One Rep Max Calculator
Calculate your one rep max lift weight instantly. Free 1RM calculator for strength training.
Estimated 1 Rep Max
Epley Formula (most common)
126.7 kg
Brzycki Formula
124.2 kg
Lombardi Formula
123.1 kg
Training Percentages (based on Epley 1RM)
Recommended weight and rep ranges for different intensity levels:
| % of 1RM | Weight (kg) | Rep Range |
|---|---|---|
| 95% | 120.3 | 1-2 reps |
| 90% | 114.0 | 3-4 reps |
| 85% | 107.7 | 5-6 reps |
| 80% | 101.3 | 6-8 reps |
| 75% | 95.0 | 8-10 reps |
| 70% | 88.7 | 10-12 reps |
| 65% | 82.3 | 12-15 reps |
| 60% | 76.0 | 15-18 reps |
| 55% | 69.7 | 18-20 reps |
| 50% | 63.3 | 20+ reps |
About the Formulas
Epley
Most commonly used formula. Good balance between simplicity and accuracy. Formula: 1RM = weight x (1 + reps/30)
Brzycki
Tends to give slightly lower estimates than Epley, especially for higher rep ranges.
Lombardi
Uses a power function. Often gives higher estimates for lower rep ranges.
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