🏆 One Rep Max Calculator

Estimate your 1RM from a submaximal lift (kg or lbs).

Weight lifted

Reps completed

Unit

About this tool

Estimate your one rep max from a lighter lift. Works in kg or lbs.

For guidance only. Results are estimates. Please speak to your GP or midwife for advice about your health.

Free, friendly health and fitness tools for the UK.

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