One Rep Max Calculator

Calculate your one-rep max (1RM) - the maximum weight you can lift for a single repetition with proper form

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Enter Your Lift Details

Kilograms

Reps completed (1-30)

⚙️ Settings ▼
💡 Tip: For most accurate results, use a weight you can lift 3-10 times. Lower rep counts (closer to 1RM) provide more accurate estimates.
0
Your Estimated 1RM
Epley Formula
Power (50-60%)
0 kg
3-5 reps × 4-6 sets
Endurance (70%)
0 kg
10-15 reps × 4-6 sets
Hypertrophy (75%)
0 kg
7-12 reps × 3-5 sets
Strength (90%)
0 kg
1-3 reps × 3-4 sets
Repetition Percentages of Your 1RM
Reps % of 1RM Weight