Free training tool
Rep max calculator
Calculate your one-rep max, every training percentage, and recommended loads — in pounds or kilograms.
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Camas, WashingtonRep max calculator
Enter a weight and 1–10 reps to see your estimated maxes.
Rep max table
| Rep max | % of 1RM | Weight | Recommended weight |
|---|---|---|---|
| 1RM | 100.0% | — | — |
| 2RM | 97.5% | — | — |
| 3RM | 95.0% | — | — |
| 4RM | 92.5% | — | — |
| 5RM | 90.0% | — | — |
| 6RM | 87.5% | — | — |
| 7RM | 85.0% | — | — |
| 8RM | 82.5% | — | — |
| 9RM | 80.0% | — | — |
| 10RM | 77.5% | — | — |
About this rep max calculator
How to use it
This free one-rep max (1RM) and rep max calculator helps athletes, lifters, and coaches quickly estimate maximum lifting capacity for bench press, squat, deadlift, and more based on the weight and number of reps performed.
Enter your lifted weight and reps, and the tool calculates your estimated 1RM using formulas such as Brzycki, Epley, Lombardi, and O'Connor, then generates a full rep max table from 1 to 10 reps.
Pick your unit
Select pounds (lbs) or kilograms (kg).
Enter your set
Type in the weight you lifted and the repetitions performed, between 1 and 10 reps.
Adjust the formula
Optionally switch prediction methods in the advanced settings.
Read your numbers
Review your estimated 1RM, rep max percentages, and recommended weights.
Limitations
Rep max formulas provide estimates and may vary depending on your individual training background, muscle fiber composition, and fatigue levels. Predictions are most accurate within moderate rep ranges (typically 3–10 reps). Always use proper form and safety precautions when testing your limits. This calculator is for educational and training guidance purposes only and should not replace professional coaching or medical advice.
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