Enter a set you actually did. The formulas estimate what you could lift once.
How it works. Epley: weight × (1 + reps/30). Brzycki: weight × 36/(37 − reps). Lombardi: weight × reps0.10. The three are shown together because they disagree — treat anything above 8-10 reps as an estimate.
Tools are free and account-free. The saved version is planned — not for sale yet.