Skip to content

One Rep Max Calculator

Estimate a one-repetition maximum from a lift weight and reps using three common equations.

Weight unit
Estimated one-rep max
215.8 lb
Epley formula
95% (2–3 reps)205 lb
90% (4–5 reps)194.3 lb
85% (6–8 reps)183.5 lb
80% (8–10 reps)172.7 lb

One-rep max estimates are approximations. Do not attempt a maximal lift without appropriate training and supervision.

About the One Rep Max Calculator

Estimate a one-repetition maximum from a lift weight and reps using three common equations.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

Common searches

Related calculators

Calories Burned CalculatorEstimate energy used during an activity from body weight, intensity, and duration.BMI CalculatorBody mass index with category and your healthy weight range for your height.

Browse more inHealth & Fitness.