One Rep Max (1RM) Estimator

Calculate your maximum lifting capacity without the risk of actual max effort testing.

Weight Lifted

Reps Performed

Estimated 1RM

95% (2 Reps) --

90% (3 Reps) --

85% (5 Reps) --

80% (8 Reps) --

Brzycki Formula: Weight / (1.0278 - (0.0278 * Reps))

Note: 1RM estimates are most accurate when based on a rep count of 10 or fewer.