One-Rep Max Calculator

Estimate your 1RM from a recent set — and see your training-percentage targets from 50% to 95%.

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Weight lifted Reps performed

Unit

Round to nearest

Estimates are most accurate at 1–10 reps. Always warm up, use a spotter for heavy attempts, and treat predictions as starting points — not goals to hit on a bad day.

Estimated 1RM

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average

Epley

—

Brzycki

—

Lombardi

—

O'Conner

—

Wathen

—

% of 1RM	Weight	Suggested reps