Wilks 2020 Score Calculator
Powerlifting Wilks 2020 score. Normalizes a powerlifting total across body weights so lifters of different sizes and sexes can be compared.
Enter sex, body weight, and the sum of squat, bench, and deadlift. Wilks 2020 coefficient is applied to the kg total.
How is this calculated?
Wilks 2020 coefficient = 600 / (a + b·x + c·x² + d·x³ + e·x⁴ + f·x⁵) where x is body weight in kg. Score = coefficient × total (kg). Sex-specific polynomial constants are from the published 2020 update.
About this tool
A Wilks score calculator normalises a powerlifting total (squat plus bench plus deadlift) against the lifter's bodyweight and sex so that a 60 kg woman and a 120 kg man can be ranked on the same scale. The 2020 update refits the original 1994 polynomial to modern competition data.
How it works
Wilks 2020 applies a sex-specific fifth-order polynomial in bodyweight (kg). The coefficient is multiplied by the total in kilograms to produce the final score. Lighter and very heavy lifters get a larger coefficient, since the curve recognises they have less leverage advantage than mid-range competitors.
Wilks 2020 coefficient = 600 / (a + b*x + c*x^2 + d*x^3 + e*x^4 + f*x^5) Wilks 2020 score = coefficient x total (kg) where x = body weight in kg, and (a, b, c, d, e, f) are sex-specific constants from the 2020 update.
| Coefficient | Male value | Female value |
|---|---|---|
| a | 47.46178854 | -125.4255398 |
| b | 8.472061379 | 13.71219419 |
| c | 0.07369410346 | -0.03307250631 |
| d | -0.001395833811 | -0.001050400051 |
| e | 7.0767e-6 | 9.3877e-6 |
| f | -1.2080e-8 | -2.3335e-8 |
Worked example
A male lifter weighs 83 kg and totals 500 kg (squat 180, bench 120, deadlift 200). What is his Wilks 2020 score?
- Inputs: sex = male, body weight = 83 kg, total = 500 kg.
- Plug bodyweight into the male polynomial denominator: 47.46 + 703.18 + 507.84 + ... = roughly 1010.6.
- Coefficient: 600 / 1010.6 = approximately 0.5938.
- Wilks score: 0.5938 x 500 = 296.9.
- Interpretation: 296.9 sits at the upper end of the Intermediate tier and just below Advanced (300+).
Wilks score interpretation tiers
Indicative ranges for drug-tested powerlifting. Use as a directional benchmark; federation rankings and qualifying totals are the official ladder.
| Tier | Wilks 2020 | Description |
|---|---|---|
| Untrained | under 150 | First few months of structured lifting |
| Novice | 150 to 200 | Newer lifter, basic strength foundation |
| Intermediate | 200 to 300 | Consistent gym-goer, 1 to 3 years training |
| Advanced | 300 to 400 | Competitive amateur, local meet podium |
| Elite | 400 to 500 | National-level competitor, regional records |
| World class | 500+ | International elite; world records often 550 to 600 |
Common mistakes and limitations
- Wilks 1994 vs 2020. Pre-2020 scores used the older formula. Recalculate before comparing.
- Mixing equipped and raw. Wilks does not adjust for suits, shirts, or wraps. Compare equipped to equipped only.
- Using lb without converting. The polynomial is in kg. Convert via x 0.45359237 first.
- Universal strength reading. It is calibrated to powerlifting (squat, bench, deadlift). Use Sinclair for Olympic lifting.
- Sex parity gospel. The female curve still produces lower elite scores in some studies. IPF GL Points and DOTS refine the picture.
When to use Wilks 2020 versus other coefficients
Wilks 2020 is one of several strength-normalising coefficients, and each fits a different context. Pick the one your federation or meet uses, because absolute scores are not interchangeable.
| Coefficient | Year | Best for |
|---|---|---|
| Wilks 2020 | 2020 | Powerlifting meets that prefer the familiar Wilks scale |
| IPF GL Points | 2020 | Official IPF competition rankings |
| DOTS | 2019 | Open online meets and casual leaderboards |
| Sinclair | updated per Olympiad | Olympic weightlifting (snatch and clean and jerk) |
For powerlifting specifically, Wilks 2020, DOTS, and IPF GL Points all rank a field similarly; the main practical difference is which one the scoring table at your meet is built on. For Olympic weightlifting, use Sinclair instead, since the Wilks polynomial was never fitted to snatch and clean and jerk totals.
Related tools
Frequently asked questions
What is the difference between Wilks (1994) and Wilks 2020?
Robert Wilks built the original formula in 1994 from drug-tested IPF data of the time. By 2020, lifter performance, especially at lighter female bodyweights and at the super-heavyweight male end, had outgrown the curve. The 2020 update refit the polynomial against modern competition data, giving lighter and very heavy lifters a fairer score. The IPF officially moved to IPF GL Points in 2020, but Wilks 2020 is widely used in federation and online meets that prefer the familiar 600-and-up scale.
What is a good Wilks score?
As a rough scale: under 200 is novice, 200 to 300 is intermediate, 300 to 400 is advanced amateur, 400 to 500 is national-level, and 500-plus is international elite. World-record holders in tested powerlifting often hit 550 to 600. The 2020 update shifted a few percent versus the original Wilks, so historical scores need to be recalculated to compare directly.
Why does my Wilks score drop after I gained weight?
The Wilks coefficient penalises bodyweight gain that does not produce a proportional total gain. The polynomial reflects that heavier lifters historically out-total lighter ones, so the formula expects you to lift more in absolute terms when you weigh more. If you put on 5 kg and your total only went up 5 kg (rather than the 10 to 15 kg the curve expects), your Wilks score falls.
Are Wilks 2020, IPF GL Points, and DOTS the same thing?
No, but they all do the same job: normalise powerlifting totals across bodyweight and sex. IPF GL Points (2020) is the current official IPF score and uses a different formula tuned to GL data. DOTS (2019) is a popular alternative based on Wilks data refit by Tim Konertz. Wilks 2020 is the updated version of the original Wilks. All three give similar rankings, but absolute values are not comparable across systems.
Sources
- Wilks, Robert (1994) The Wilks Formula, original IPF coefficient paper.
- Wilks, Robert (2020) Wilks 2020 Update, refit polynomial coefficients for modern data.
- International Powerlifting Federation (2020) IPF GL Coefficients - current official formula used at IPF events.
- Konertz, Tim (2019) DOTS Score - alternative refit of Wilks data, popular in open online meets.
- USAPL / USA Powerlifting (2024) Rulebook - reference for category and weight class definitions.