One Rep Max Calculator
Free One Rep Max Calculator — calculate and compare options instantly. No signup required.
Epley Formula
158 lbs
Most commonly used 1RM estimate
Brzycki Formula
152 lbs
Lander Formula
154 lbs
Average 1RM
154 lbs
100% of 1RM
154 lbs
95% of 1RM
147 lbs
90% of 1RM
139 lbs
85% of 1RM
131 lbs
80% of 1RM
123 lbs
75% of 1RM
116 lbs
70% of 1RM
108 lbs
65% of 1RM
100 lbs
60% of 1RM
93 lbs
How to Use the One Rep Max Calculator
- 1. Enter your values — fill in the input fields with your numbers.
- 2. Adjust settings — use the sliders and selectors to customize your calculation.
- 3. View results instantly — calculations update in real-time as you change inputs.
- 4. Compare scenarios — adjust values to see how changes affect your results.
- 5. Share or print — copy the link, share results, or print for your records.
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