Estimated 1RM
0
Weight x (1 + (reps + RIR) / 30)
Free strength training tool
1RM and RIR calculator
Estimate one-rep max from weight, reps, and reps in reserve. Then reverse the math to find a target training load for the reps and effort you want.
Calculator
Enter a recent set.
| Use pounds or kilograms. The output uses the same unit. | ||
| Use the reps you actually completed. | ||
| Use 0 if the set was taken to failure. | ||
| For the suggested training load. | ||
| For the suggested training load. |
Suggested load
0
Estimated 1RM / (1 + (target reps + target RIR) / 30)
Totality
Use this during training
Totality uses strength context, workout history, and editable suggestions inside the app.
Limits
This is a useful estimate, not a command.
The formula is helpful for comparing sets, but technique, fatigue, exercise selection, and inaccurate RIR can change the real load. Totality keeps suggestions editable so the lifter or coach can adjust.