RPE calculator

Find working weights for your rep and effort targets.

Calculate your working weights

Choose kilograms or pounds, then enter a known Estimated 1RM or estimate one from a recent Set's weight, reps, and observed RPE. The interactive calculator shows working weights for 1–12 reps at RPE 5–10.

Calculate working weights from an Estimated 1RM

Lift applies an RPE percentage chart to your Estimated 1RM so you can compare loads across rep and effort targets. Use the result as a planning reference, then adjust for the Lift, the day, and your own performance.

RPE calculator questions

What does RPE mean in lifting?

Rate of perceived exertion describes how close a Set is to failure. RPE 10 means no repetitions remain, RPE 9 means roughly one remains, and RPE 8 means roughly two remain.

How does Lift estimate a one-rep max?

This public calculator divides a recent Set's weight by the chart percentage for its completed reps and observed RPE. This is an RPE-chart estimate, not a tested maximum. Lift's tracked Estimated 1RM uses the separate Brzycki formula.

Are calculated working weights prescriptions?

No. The chart is a planning reference, not an automated coaching recommendation. Adjust the load for the Lift, your readiness, available equipment, and how the Set actually feels.

Does the public calculator save my training data?

No. The public calculator works without an account and does not save its inputs. A Lift account connects planned Sets, completed Workouts, and progress across a training Block.