Calculate your one-rep max (1RM) for any lift. Your one-rep max is the max weight you can lift for a single repetition for a given exercise.

Calculate your one rep max (1RM) for bench press, deadlifts and squats. Your one rep max is the max weight you can lift for a single repetition for a given exercise.

Use our 1RM calculator to calculate your one rep max in any exercise. Your 1RM is the max weight you can lift for a single repetition.

The most accurate 1 rep max calculator using multiple proven formulas. Support for RPE calculations, exercise-specific calculations, and comprehensive rep conversion tables including 5x5 conversions.

Use our one rep max calculator to estimate your 1RM from weight and reps using Epley, Brzycki, and more formulas. Get training percentages for bench press, squat, deadlift, and other lifts.

Estimate your one-rep max using seven scientifically validated formulas. Enter the weight you lifted and the number of reps you completed, and this calculator will predict the maximum weight you could lift …

Use this calculator to estimate your one-repetition maximum a.k.a. one rep max or 1RM, based on how many reps you can do with a given weight, while maintaining proper form. 1RM calculator to …

Calculate your one-rep maximum using three validated formulas: Epley, Brzycki, and Lombardi. Know your 1RM to plan effective strength training program...

The One Rep Max Calculator below will give you an accurate estimate of your 1RM based on how many reps you can do of any particular weight, as well as percentages of 1RM in 5% increments.

Free 1RM calculator for personal trainers. Estimate your client's one-rep max with proven formulas and program precise training loads.