Our Wilks calculator uses the official Wilks formula developed in 1994 to calculate normalized strength scores across weight classes. The calculation applies polynomial coefficients to produce a normalized score that allows fair comparison across all weight classes.

Understanding Wilks Scores

The Wilks formula was the international standard for comparing powerlifting strength from 1994 to 2020, when it was replaced by DOTS in many federations. Wilks scores normalize strength across weight classes, allowing fair comparison between lifters of different bodyweights. Higher scores indicate greater relative strength.

• Wilks coefficient adjusts based on bodyweight - lighter lifters get higher coefficients
• The formula uses a 6th-degree polynomial to model strength-to-weight relationships
• Male and female lifters use different coefficient sets for accuracy
• Wilks became less accurate for very light (<52kg) and very heavy (>120kg) lifters
• Many federations now use DOTS, though Wilks is still used in some competitions
• Wilks scores are useful for historical comparisons and legacy rankings

Sources & References