One rep max calculator

Estimate your one-rep max from a working set

Use this one-rep max calculator to estimate strength from a recent set, then plan training loads without testing a true max every week.

Estimated one-rep max

93 kg

These estimates are starting points, not medical advice. Adjust based on real progress, recovery, and guidance from a qualified professional when needed.

Useful for planning loads

Estimated one-rep max values help set training percentages for strength blocks, top sets, and back-off work.

Best with lower rep sets

The estimate is usually more useful when reps are moderate or low. Very high-rep sets are less precise for max strength.

Track changes over time

Use estimates consistently and watch the trend instead of treating one calculation as a perfect number.