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Squat Max Calculator
Estimate your squat one-rep max from a near-failure set. Enter the weight and reps and this calculator runs Epley, Brzycki and Lombardi and averages them into one estimate, keeping your unit (lb or kg). A 315 lb squat for 5 reps estimates to roughly 355 lb; the spread between the three formulas shows how precise the number is. Brzycki is most accurate for 1–6 reps and Epley for 6–10, and Epley is dropped from the average at 1–2 reps because it reads about 3% high on a true single. On big lower-body lifts like the squat, high-rep sets can read a little optimistic, so a low-rep near-failure set gives the most reliable max. You also get a rep-max % training table — the load for 1–12 reps as a percentage of your squat 1RM — for percentage-based programming. This is a fitness estimate: reps must be near-failure and accuracy degrades above about 10 reps.
Squat 1RM = average of Epley, Brzycki and Lombardi (unit preserved)
- Low-rep near-failure sets read most reliably on the squat
- Rep-max % table gives your squat load for 1–12 reps
Frequently asked questions
How do I estimate my squat 1RM?
Take a weight you squatted for a known number of near-failure reps and let the calculator average Epley, Brzycki and Lombardi. For example, 315 lb for 5 reps estimates to about 355 lb. A low-rep set (3–6 reps) gives the most trustworthy squat max.
Why does my squat max look high from a high-rep set?
On big lower-body lifts, high-rep performance leans heavily on conditioning and pain tolerance, so the formulas can overestimate the true one-rep max above about 10 reps. Use a heavier, lower-rep set taken close to failure for a more accurate squat 1RM.