Squat 1RM Calculator 🏋️
Estimate your one-rep maximum (1RM) for the squat based on a completed sub-maximal set.
1RM Formulas Explained
The One-Rep Max (1RM) is calculated by multiplying the weight lifted ($W$) by a factor derived from the number of repetitions ($R$).
Epley Formula (Most Popular)
$$ 1RM = W \times \left(1 + \frac{R}{30}\right) $$
Brzycki Formula
$$ 1RM = W \times \frac{36}{37 - R} $$
Lander Formula
$$ 1RM = W \times \frac{100}{101.3 - 2.67123 \times R} $$
Lombardi Formula
$$ 1RM = W \times R^{0.1} $$
Note: These formulas are **estimates** and may deviate significantly from your true 1RM, especially at higher rep counts (10+ reps) or for less experienced lifters.