One-Rep Max (1RM) Calculator

Enter the weight you lifted and the number of reps to see your estimated 1RM and working weights for hypertrophy, strength and endurance.

Weight lifted80 kg

10 kg300 kg

Clean reps completed8 reps

1 reps12 reps

Epley formula101.3 kg

Brzycki formula99.3 kg

Estimated 1RM (average)100.3 kg

Endurance (60% ≈ 15+ reps)60.2 kg

Hypertrophy (70% ≈ 8-12 reps)70.2 kg

Strength (85% ≈ 3-6 reps)85.3 kg

Write a programme with a coach

Estimation formulas lose reliability above 10 reps. Always attempt maximums with a spotter and a proper warm-up; beginners should use this calculation instead of a true 1RM test. If you have health problems, consult your coach and doctor.

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