Health Tools

One Rep MaxCalculator

Calculate your one rep max (1RM) based on weight lifted and reps performed. Estimate your maximum strength safely.

1RM Calculation

Your One Rep Max

Estimated 1RM208lbs
Training Weight (85%)177lbs

Rep Max Chart

2 RM (95%)198 lbs
3 RM (93%)193 lbs
5 RM (87%)181 lbs
8 RM (80%)166 lbs
10 RM (75%)156 lbs

Safety Warning

Never test 1RM without proper warmup and spotter. Use calculated estimates for training. Work up gradually to test true max.

Formulas

  • Brzycki: Weight/(1.0278-0.0278×Reps)
  • Epley: Weight×(1+Reps/30)
  • Best for under 10 reps

Related Tools