Wilks Score Calculator
The Wilks score, developed by Robert Wilks, allows powerlifters of different body weights to compare their relative strength on a common scale. A heavier lifter can lift more in absolute terms, but the Wilks coefficient adjusts for body weight using a polynomial function so that a 60 kg lifter and a 120 kg lifter can be fairly compared. The score is calculated by multiplying your powerlifting total (squat + bench press + deadlift) by the Wilks coefficient for your body weight. Enter your body weight in kilograms, your total in kilograms, and select your sex to see your Wilks score.
Wilks score formula
Wilks = total × (500 / (a + bx + cx² + dx³ + ex⁴ + fx⁵))
Where x is body weight in kg. The polynomial coefficients differ by sex. For males: a = -216.0475144, b = 16.2606339, c = -0.002388645, d = -0.00113732, e = 7.01863e-6, f = -1.291e-8. For females: a = 594.31747775582, b = -27.23842536447, c = 0.82112226871, d = -0.00930733913, e = 4.731582e-5, f = -9.054e-8. The coefficient increases at lighter body weights and decreases at heavier body weights, normalizing for the diminishing returns of size on strength.
Interpreting your Wilks score
- Under 200: Beginner level.
- 200 to 300: Intermediate. Competitive in local meets.
- 300 to 400: Advanced. Competitive at regional level.
- 400 to 500: Elite. National-level competitors.
- Above 500: World-class. Top international competitors.
Wilks score calculator: frequently asked questions
What is the Wilks score?
The Wilks score is a coefficient used in powerlifting to compare the relative strength of lifters of different body weights. It is calculated as: Wilks = total lifted x coefficient(bodyweight). The coefficient accounts for the non-linear relationship between body weight and strength potential.
What are the Wilks coefficient constants?
For males, the polynomial coefficients are: a = -216.0475144, b = 16.2606339, c = -0.002388645, d = -0.00113732, e = 7.01863e-6, f = -1.291e-8. For females: a = 594.31747775582, b = -27.23842536447, c = 0.82112226871, d = -0.00930733913, e = 4.731582e-5, f = -9.054e-8. The Wilks coefficient = 500 / (a + bx + cx^2 + dx^3 + ex^4 + fx^5) where x is body weight in kg.
Has the Wilks formula been replaced?
The International Powerlifting Federation (IPF) switched to the IPF GL Points system in 2019 for its sanctioned competitions. However, the Wilks score remains widely used in unsanctioned meets and for general comparison purposes, and many federations still use it.
What is a good Wilks score?
As a general guide: below 200 is beginner, 200 to 300 is intermediate, 300 to 400 is advanced, 400 to 500 is elite, and above 500 is world-class. Elite IPF competitors typically score above 450. These thresholds vary by federation and competitive era.
Is the Wilks score the same as Wilks2?
No. The updated Wilks2 (2020 revision) uses different polynomial coefficients that were recalibrated using modern competition data. This calculator implements the original Wilks formula. Check with your federation for which version applies to your competition.
Official sources
- Wilks, R. Wilks Coefficient Formula. Cited in: IPF Formula and Records (powerlifting.sport).
- International Powerlifting Federation: powerlifting.sport.
- National Strength and Conditioning Association: nsca.com.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.