1RM Calculator: Epley Formula

Calculate your 1RM safely using the proven Epley formula. Get instant training percentages for any lift-barbell, bodyweight, or push-ups. No ads. Works offline.

1RM CALCULATOR – YOUR STRENGTH TRAINING COMPANION

Calculate your one-rep max instantly using the proven Epley formula. Get training percentages, and program workouts with confidence.

FREE WEIGHTS CALCULATOR Enter your weight and reps for any barbell or dumbbell exercise. Get your estimated 1RM in seconds.

BODYWEIGHT EXERCISES Calculate max capacity for pull-ups, dips, and other bodyweight movements—with or without added weight.

PUSH-UP VARIATIONS Specialized calculations for elevated, standard, strict, and decline push-ups.

INSTANT TRAINING PERCENTAGES Perfect for planning progressive overload.

KG & LBS SUPPORT Switch between kilograms and pounds instantly. Great for international lifters or anyone who trains at different gyms.

EPLEY FORMULA Uses the scientifically-backed formula: 1RM = weight × (1 + reps ÷ 30). Most accurate with 1-10 reps.

CLEAN INTERFACE Simple, intuitive design.

WORKS OFFLINE No internet required. Calculate anywhere, anytime.

NO ADS, NO SUBSCRIPTIONS Pay once, own forever. No hidden costs.

IDEAL FOR: • Powerlifters planning training cycles • CrossFit athletes tracking benchmark lifts • Personal trainers working with clients • Gym-goers following strength programs • Anyone wanting to estimate max lifts safely

WHY ESTIMATE YOUR 1RM?

Testing your true one-rep max is taxing on your body and carries injury risk. By using submaximal weights (weights you can lift for 2-10 reps), you can accurately estimate your max without the strain. It's safer, smarter, and just as effective for programming your training.

Download 1RM Calculator and take your strength training to the next level.