LiftCalc - 1RM Calculator

Estimate your one-rep max for bench, squat, and deadlift in seconds, then plan today's warm-up sets and barbell plate loading in one place.

1RM estimation
- Calculate estimated 1RM from weight and reps
- Multiple estimation formulas, your choice is remembered
- kg/lb units

Warm-up and plates
- Plan warm-up sets from a target weight
- Load the bar using the plates you actually own

History
- Keep up to 100 recent calculations on your device
- Units, formula, and theme preferences are saved
- Light and dark themes

Offline, no account
All calculations and history stay on your device. There is no sign-up, and the app does not ask for your name, email, or health data. LiftCalc is free and shows a banner ad at the bottom of the screen.

Important notice
LiftCalc is a calculator, not a source of training, medical, or rehabilitation advice. Estimated 1RM values are approximations. Use a spotter and proper safety equipment for heavy attempts, and train within your own limits.