1RM from any set
Enter the weight and reps from a set to estimate your one rep max, in kilograms or pounds.
Calculate your one rep max.
A one rep max calculator for lifters: estimate your 1RM from any set and compare it with bodyweight-based strength standards.
What 1RM Calculator does
Strength standards
Compare your 1RM with bodyweight-based standards and see your class, tier and division.
Rank progress
See how close you are to the next strength rank.
Lift history
Save lifts on your device and follow your estimates over time.
Free tools
A look inside
Questions
Do I need to test a true max?
No. The app estimates your one rep max from a submaximal set of several reps.
Does it support pounds?
Yes. Use kilograms or pounds.
Something else? Get support
Calculate your one rep max. See your strength rank.
Free, with optional upgrades
