Estimate your one-repetition maximum (1RM) from any weight and rep count. Uses five published formulas and shows your full percentage-based training weight table.
Enter weight and reps
Enter the weight you lifted and how many reps you completed. The calculator estimates your 1RM using five formulas.
| Formula | Result |
|---|
| % of 1RM | Weight | Reps (approx) |
|---|