Free tool

Deadlift 1RM Calculator

Estimate deadlift 1RM without max testing. Compare 5 validated formulas for conventional or sumo deadlift and get percentage tables you can program from immediately.

How to use this calculator

Enter the load used, reps completed, and deadlift style. The calculator estimates 1RM with 5 formulas, averages them, and returns a percentage table you can use for programming.

Deadlift estimates are usually most useful from heavy sets of 3-6 reps. Higher-rep sets can fail from grip or back fatigue before they reflect true max strength.

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Frequently asked questions