Bench Rep Calculator
Use this free bench rep calculator to estimate your max and the weight for a target number of reps.
Health information notice: Results are estimates based on general formulas and may not reflect individual circumstances. This tool is not a diagnosis or substitute for personalized advice from a qualified healthcare professional.
How the bench rep calculator works
1RM (Brzycki) = weight × 36 ÷ (37 − reps). Weight for N reps = 1RM × (37 − N) ÷ 36.
Frequently asked questions
How accurate is it?
Best for 10 reps or fewer. Fatigue and technique change real performance.
Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.