Wilks Calculator

Calculate wilks — strength training calculator.

lbs
lbs
Estimated 1RM
Strength Ratio
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What Is Wilks?

Wilks estimates your one-rep max from submaximal lifts using the Epley formula.

Formula

1RM = Weight × (1 + Reps/30)

Frequently Asked Questions

How accurate is this?

The Epley formula is most accurate for 1-10 reps. Higher rep ranges are less reliable.