E1RM Calculator - RPE Based

E1RM Calculator is a powerful training tool for strength athletes. Using the scientifically-backed RPE (Rate of Perceived Exertion) method developed by Mike Tuchscherer and popularised by Barbell Medicine,
it gives you accurate one rep max estimates and helps you plan complete training sessions.

CALCULATE YOUR 1RM
Enter the weight you lifted, the number of reps, and how hard it felt on the RPE scale. The app instantly estimates your one rep max using a precise lookup table that accounts for both rep count and
perceived exertion.

TRAINING PERCENTAGES
See your estimated working weights at 95%, 90%, 85%, 80%, 75%, 70%, 65%, and 60% of your 1RM at a glance. Use the custom percentage calculator to find the weight for any percentage you need.

SETS PLANNER
Plan your full training session before you walk into the gym. Configure your opening set, then add follow-up sets using RPE targets, percentage reductions or increases, or specific weights. Generate your
complete session and copy it to your clipboard to share or reference during training.

FLEXIBLE SETTINGS
Choose between kg and lbs. Configure weight rounding to match your available plates — round to the nearest 0.5 or 2.5, and choose whether to round up, down, or to the nearest increment.

SIMPLE AND FOCUSED
No account required. No ads. Works completely offline. Your settings are saved locally on your device.