Squat One-Rep Max (1RM) Calculator
Enter your squat weight and reps to estimate your one-rep max (1RM).
Input Data
Epley / Brzycki / Lander / Lombardi.
Weight
Reps
Results
Estimated one-rep max.
116.7
Explanatory note about the result.
Epley: 100kg × 5 次 → 1RM ≈ 116.7 kg。
At a glance:Estimate 1RM from a submaximal set. Epley: 1RM = weight × (1 + reps/30). Brzycki: 1RM = weight × 36/(37−reps). Estimates only — test a true 1RM with a rack/safety. Complements bench-1rm and deadlift-1rm.
Formula
Epley: 1RM = weight × (1 + reps/30).
Brzycki: 1RM = weight × 36 / (37 − reps).
How to Use
- Pick a formula.
- Enter the weight you lifted and the reps completed.
- The tool returns the estimated 1RM.
Case Studies
120 kg × 5 reps (Epley)
1RM = 120 × (1 + 5/30) = 140 kg.
FAQ
Which formula is best?
Epley is most common; Brzycki often fits trained lifters; compare both.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.