Calculate Your TrueOne Rep Max

Professional-grade strength calculator trusted by athletes, coaches, and fitness professionals worldwide. Get accurate 1RM estimates using scientifically proven formulas.

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50,000+ Athletes

Trust our calculations daily

Bench Press315 lbs

Squat405 lbs

Deadlift495 lbs

Total1,215 lbs

98.7%

Accuracy

Formulas

5★

Rating

Everything You Need

Professional Features for Serious Athletes

Our calculator provides comprehensive tools to help you train smarter, lift heavier, and achieve your strength goals safely.

Multiple Formulas: Uses Epley, Brzycki, and Lombardi formulas for the most accurate estimation across different rep ranges.
Percentage Charts: Instantly generate percentage-based training loads from 50% to 95% of your calculated 1RM.
Warm-up Protocol: Get personalized warm-up sets calculated specifically for your working weights and goals.
Meet Attempts: Plan your competition attempts with conservative, standard, or aggressive strategies.
Plate Calculator: Know exactly which plates to load on each side of the bar for any target weight.
Mobile Optimized: Designed for easy use on any device, perfect for quick calculations at the gym.

Calculate Your 1RM Now

Enter your lift details below to get instant, accurate calculations

Input

Weight

Repetitions

reps

Enter weight and reps to calculate your 1RM

Important Safety Information

•These calculations are estimates based on submaximal performance and may vary based on individual factors
•Always use proper form, adequate warm-up, and appropriate safety equipment when attempting heavy lifts
•Work with a qualified coach or spotter when testing near-maximal loads
•Listen to your body and adjust loads based on daily readiness and fatigue levels

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Join thousands of athletes who use our calculator to optimize their training and achieve new personal records.

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