Home/Tools/Squat Calculator

Squat Calculator: Estimate Your 1RM

Paul Hummel Last reviewed October 6, 2026 3 min read
Calculator

Calculate your squat 1RM

Brzycki and Epley equations.

Estimated squat 1RM
0kg
Brzycki
–
Epley
–
Per body weight
–
RepsWeight% 1RM
Log every set via chat – get GymLog AI →
Average of the Brzycki and Epley equations, rounded to 0.5 kg. The table uses the Brzycki equation.
Quick answer

Your squat 1RM can be estimated from one heavy set: enter weight and reps, and the calculator uses the Brzycki and Epley equations and shows training loads for 1 to 12 reps plus strength relative to body weight.

How the calculator estimates your squat 1RM

Instead of a true max attempt, you enter a weight and the number of clean reps from a heavy set. The calculator estimates your 1RM with two equations: Brzycki (1993) uses weight × 36 ÷ (37 − reps), Epley uses weight × (1 + reps ÷ 30). The average is shown. Kravitz et al. (2003) concluded that in powerlifters, 1RM in the bench press, squat and deadlift can be predicted from submaximal tests with an acceptable degree of accuracy.

Training loads from your 1RM

The table below the result shows roughly which weight fits 1 to 12 reps to failure. For sets with reps in reserve – say two reps “left in the tank” – use the RPE calculator. To load the bar, use the plate calculator.

When does a squat count?

Under IPF rules, a squat counts when the top surface of the legs at the hip joint is lower than the top of the knees. The lift starts and ends upright with knees locked; double bouncing at the bottom or any downward movement during the ascent is not allowed.

Strength relative to body weight

With body weight, the calculator also shows relative strength (1RM ÷ body weight). For a score across all three lifts, use the DOTS & Wilks calculator.

The result is an estimate. It is most accurate with few reps (about 2 to 6) and good technique. Only attempt a true max with warm-up sets and spotting.

More free calculators

1RM calculatorOne-rep max from weight and reps Bench press calculatorBench 1RM and IPF points Deadlift calculatorDeadlift 1RM and training loads RPE calculatorTraining load by RPE and RIR

Capture every personal best

GymLog AI logs sets via chat. Your last numbers are already there at your next workout.

Download on the App StoreGet it on Google Play

Related questions

Sources

  1. Brzycki, M. (1993). Strength Testing—Predicting a One-Rep Max from Reps-to-Fatigue. Journal of Physical Education, Recreation & Dance, 64(1), 88–90. DOI
  2. Kravitz, L., Akalan, C., Nowicki, K. & Kinzey, S. J. (2003). Prediction of 1 repetition maximum in high-school power lifters. J Strength Cond Res, 17(1), 167–172. PubMed
  3. International Powerlifting Federation (IPF) (2021). Technical Rules Book. powerlifting.sport (PDF)
This content is for general informational purposes only. Max attempts should only be performed with proper technique, a warm-up and spotting.