One Rep Max Calculator
Estimate your maximum lift based on sub-maximal performance using the industry-standard Epley and Brzycki formulas.
Input Data
kg
5
1 RM
10
20 RM
Weight × (1 + 0.0333 × Reps). Tends to be more accurate for lower rep ranges (1-10).
Pro Tip
For the most accurate estimate, use a weight you can lift for 3 to 6 reps. Estimates based on 10+ reps are generally less accurate for true 1RM strength.
Estimated One Rep Max
0
kg
Intensity
0%
Loading Chart (% of 1RM)
| Reps | % of 1RM | Visual | Weight |
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