Health & Fitness
Intermediate

One-Rep Max (Brzycki)

Estimated one-rep max, an alternative to Epley.

Formula

1RM=w×3637−r1RM = w \times \frac{36}{37 - r}

Variables

wWeight lifted
rReps performed

Example

100 kg × 5 reps ⇒ 112.5 kg

Did You Know?

Brzycki's formula gives slightly lower numbers than Epley's at high rep counts, so lifters often compare both.

1rmstrengthbrzycki