Estimated 1RM.

Tillen estimates your one-rep max from your working sets using the Epley formula:

1RM = weight × (1 + reps / 30)

For example, a set of 100 kg × 5 reps yields an estimated 1RM of roughly 117 kg.

For bodyweight exercises such as pull-ups and dips, your bodyweight is added to the load. For assisted exercises, the assist weight is subtracted instead. Both calculations rely on a current bodyweight value, which you can log in Profile → Measurements → Bodyweight.

Estimated 1RMs appear in stats and trigger 1RM PRs at the end of a workout. Toggle the display in Settings → Training → Show 1RM estimates.