How the Wilks formula works
The Wilks formula calculates a coefficient based on body weight and sex, then multiplies it by your powerlifting total to produce a Wilks score. The Wilks coefficient normalises strength across weight classes so lifters of different sizes can be compared fairly. The formula uses a 5th-degree polynomial: Wilks = Total × 500 / (a + b×BW + c×BW² + d×BW³ + e×BW⁴ + f×BW⁵), where the coefficients a–f differ for men and women.
This calculator uses the classic Wilks formula published by Robert Wilks in 1998 through the International Powerlifting Federation (IPF). The IPF introduced IPF GL Points in 2020 for official competition scoring, while DOTS (Dictionary of Theoretical Strength) offers another alternative. Each formula handles extreme weight classes differently, but the classic Wilks remains the most widely recognised in powerlifting training and informal competition.
How to use the target and sensitivity rows
The next-band row answers a practical question most Wilks score calculators leave to mental maths: how much more total is needed at the same bodyweight. The bodyweight sensitivity table shows how the same total would score if bodyweight changed by 2.5 kg, which helps with weight-class planning while keeping the caveat visible that a lower weigh-in can also reduce performance.
Does the Wilks calculator account for age?
No. The Wilks formula does not include an age variable — it uses only body weight and sex. Age-adjusted comparisons in powerlifting typically use separate formulas such as the McCulloch or Foster coefficients applied on top of the Wilks score.