One Rep Max from Reps

Free One Rep Max from Reps calculator with clear step-by-step results.

About One Rep Max from Reps

The Epley formula estimates a one-rep max from a submaximal set.

1RM ≈ weight × (1 + reps ÷ 30)

Estimates are general guidance — consult a healthcare professional for personal medical advice.

How does this calculator work?

The Epley formula estimates a one-rep max from a submaximal set.

Why does this matter?

Estimate only — test 1RM safely with a spotter.

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Free One Rep Max from Reps calculator with clear step-by-step results.

The Epley formula estimates a one-rep max from a submaximal set.

1RM ≈ weight × (1 + reps ÷ 30)

Estimates are general guidance — consult a healthcare professional for personal medical advice.

How does this calculator work?

The Epley formula estimates a one-rep max from a submaximal set.

Why does this matter?

Estimate only — test 1RM safely with a spotter.