

1RM Estimator
Type the weight and reps from your hardest set and we’ll do the numbers for you, giving a quick estimate of your true one-rep max.
1RM Percentage Chart


1RM Formula
Epley, Brzycki, Lander, O’Connor, or even an averaged blend—the choice is yours. Tap the Formula menu, pick the equation you trust, and the app recalculates your max on the spot.












