Calculate Your One-Rep Max!

Enter how much weight and how many reps you did for your last workout to find your approximate one-rep max!

Before beginning any strength-training program, you should determine your one-repetition maximum (1RM) to gauge your current strength level. Knowing your one-rep maximum will give a precise indication of how much weight you're capable of lifting for one repetition across a range of exercises, sport-specific or otherwise.

Related Video Calculating your 1RM
Watch The Video - 03:56

Once you learn your one-lift capacity, you can design your program around these maximal weights. For example, it might be suitable for power-training that 85 percent of a one-rep maximum is used as a training weight for the bench press, squat, and deadlift. For toning, or developing a defined body for the beach, 70 percent or lower might be more appropriate.

Calculate Your One-Rep Max (1RM)

Weight Lifted
Reps Done

= One-Rep Max

 95% 1 RM
 90% 1 RM
 85% 1 RM
 80% 1 RM
 75% 1 RM
 70% 1 RM
 65% 1 RM
 60% 1 RM
 55% 1 RM
 50% 1 RM

Fitness Calculators Main Page

Recommended For You

Women's Fitness: 4 Reasons The Word ''Toned'' Needs To Die

''Toned''—the word litters everything from the covers of women's fitness magazines to ''fitspiration'' memes on Twitter and Instagram. It's time to let it RIP.

Amateur Bodybuilder Of The Week: Daniel Left Sports And Began Bodybuilding

Daniel used the ethics he learned from sports to commit to an exercise regimen that prepared him for the stage!

Women Strength Training: Your
Guide To A Sexy & Fit Body!

Since you know that lifting pink dumbbells isn't going to get you a lean, sexy and fit body, let's discuss what you should be doing in the gym. Find out more.