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Wilks Calculator
Calculate your Wilks Score to compare powerlifting strength across bodyweights and genders. Enter your bodyweight and either your three lifts or a combined total, in kilograms or pounds, and get the score, the exact coefficient used, a strength level interpretation and the full polynomial math.
Wilks Calculator
Compare powerlifting totals across bodyweight and gender
Selects the coefficient set
Competition bodyweight in kg
Squat + bench press + deadlift combined
Results
Enter bodyweight and total, then click Calculate Wilks Score
Understanding the Wilks Score
Raw powerlifting totals cannot be compared directly. A heavier lifter has more muscle mass and better leverages, so a 120 kg athlete will almost always out-total a 60 kg athlete even if the lighter lifter is relatively far stronger. The Wilks Score solves this by multiplying your total by a coefficient that shrinks as bodyweight rises.
Developed by Robert Wilks in 1994, the coefficient comes from a fifth-order polynomial fitted to world-record data, with separate constants for men and women. The result is a single number on which a 60 kg and a 120 kg lifter can be ranked against each other — which is why it became the standard for open-class comparison, gym leaderboards and cross-division awards.
Wilks Score Formulas
The calculation has three parts — build the total, evaluate the coefficient, then multiply:
1. Total Lifted
The competition total is the sum of the three best successful attempts:
2. Wilks Coefficient
A fifth-order polynomial in bodyweight, with BW in kilograms:
3. Wilks Score
Finally, scale the total by the coefficient:
4. Unit Conversion
The formula is defined in kilograms, so imperial inputs are converted first:
Original Wilks Coefficient Constants
The six polynomial constants used by this calculator, from the Original Wilks (1994) formula:
| Constant | Male | Female |
|---|---|---|
| a | −216.0475144 | 594.31747775582 |
| b | 16.2606339 | −27.23842536447 |
| c | −0.002388645 | 0.82112226871 |
| d | −0.00113732 | −0.00930733913 |
| e | 7.01863 × 10⁻⁶ | 4.731582 × 10⁻⁵ |
| f | −1.291 × 10⁻⁸ | −9.054 × 10⁻⁸ |
How Bodyweight Shapes the Score
A few properties of the formula are worth understanding before you read too much into a score:
- Lighter Lifters Get a Larger Multiplier: At 60 kg a male lifter's coefficient is about 0.853; at 120 kg it falls to about 0.575. The same 600 kg total is therefore worth 512 points at 60 kg but only 345 at 120 kg.
- Diminishing Returns at the Top End: The curve flattens above roughly 140 kg, so additional bodyweight buys very little coefficient penalty relief. This is why super-heavyweight totals must be enormous to score competitively.
- The Polynomial Turns Upward: Past about 155 kg for women and 200 kg for men, the fifth-order curve reverses and starts rewarding extra bodyweight — a mathematical artefact of the fit, not a real effect. Results beyond those bodyweights are flagged as unreliable.
Wilks Coefficient by Bodyweight
Coefficients at common bodyweights, with the score a 500 kg total would produce:
| Bodyweight | Male Coeff. | Male @ 500 kg | Female Coeff. | Female @ 500 kg |
|---|---|---|---|---|
| 50 kg | 1.02317 | 511.6 | 1.28464 | 642.3 |
| 60 kg | 0.85287 | 426.4 | 1.11489 | 557.4 |
| 75 kg | 0.71256 | 356.3 | 0.95064 | 475.3 |
| 80 kg | 0.68270 | 341.3 | 0.91501 | 457.5 |
| 100 kg | 0.60859 | 304.3 | 0.83258 | 416.3 |
| 120 kg | 0.57492 | 287.5 | 0.79966 | 399.8 |
| 140 kg | 0.55881 | 279.4 | 0.77763 | 388.8 |
Wilks Score Strength Levels
Commonly used interpretation bands. These are conventional guidelines rather than official standards:
| Wilks Score | Level | Typical Context |
|---|---|---|
| Under 200 | Beginner | New to structured barbell training |
| 200–300 | Novice | Consistent training, still progressing linearly |
| 300–400 | Intermediate | Competitive locally, above most gym lifters |
| 400–500 | Advanced | Places at regional and national meets |
| 500–600 | Elite | National and international calibre |
| 600+ | World Class | World-record territory |
Benefits of Using the Wilks Calculator
Example Calculations
Here are three scenarios worked out step-by-step:
Example Scenario 1 — Male Lifter
Gender: Male · Bodyweight: 80 kg · Total: 600 kg (220 squat, 150 bench, 230 deadlift).
Coefficient = 500 / (a + b·BW + c·BW² + d·BW³ + e·BW⁴ + f·BW⁵)
Male constants: a = −216.0475144, b = 16.2606339, c = −0.002388645, …
Denominator at BW 80 = 732.387626
Coefficient = 500 / 732.387626 = 0.6826986
Wilks Score = 600 × 0.6826986 = 409.62
Result: Wilks Score 409.62 — Advanced level
Example Scenario 2 — Female Lifter
Gender: Female · Bodyweight: 60 kg · Total: 350 kg.
Female constants: a = 594.31747775582, b = −27.23842536447, …
Denominator at BW 60 = 448.475994
Coefficient = 500 / 448.475994 = 1.1148869
Wilks Score = 350 × 1.1148869 = 390.21
Note the female coefficient exceeds 1.0 at this bodyweight, so the
score is higher than the raw total
Result: Wilks Score 390.21 — Intermediate level
Example Scenario 3 — Heavyweight Male
Gender: Male · Bodyweight: 120 kg · Total: 750 kg.
Denominator at BW 120 = 869.684110
Coefficient = 500 / 869.684110 = 0.5749214
Wilks Score = 750 × 0.5749214 = 431.19
The heavier bodyweight gives a smaller coefficient (0.575 vs 0.683 at 80 kg),
which is exactly how Wilks offsets the advantage of extra mass
Result: Wilks Score 431.19 — Advanced level
Formula Version Tip
This calculator implements the Original Wilks (1994) formula. Several competing systems now exist — Wilks2 (2020), IPF Points, IPF GL Points and DOTS — and each gives a different number for identical lifts. The IPF itself abandoned Wilks in 2019, so a score here will not match a current IPF result sheet. If you are comparing against another calculator or a leaderboard, always check which version it uses before concluding either figure is wrong.
Frequently Asked Questions
- How is the Wilks Score calculated?
- Multiply your total lifted in kilograms by a coefficient derived from your bodyweight: Wilks Score = Total (kg) × Coefficient, where Coefficient = 500 / (a + b·BW + c·BW² + d·BW³ + e·BW⁴ + f·BW⁵). The six constants a–f differ between men and women and come from the Original Wilks formula published in 1994.
- What is the Wilks Score used for?
- It lets powerlifters of different bodyweights and genders be compared on a single scale. A 60 kg lifter totalling 400 kg and a 120 kg lifter totalling 650 kg cannot be ranked by raw total alone, because heavier lifters have an absolute strength advantage. The coefficient normalises for that.
- What is a good Wilks Score?
- Roughly: under 200 is beginner, 200–300 novice, 300–400 intermediate, 400–500 advanced, 500–600 elite, and above 600 is world-class. A score around 300 already puts a lifter well ahead of most gym-goers, while 500+ is national competition standard.
- Why is the female coefficient higher than the male one?
- Because the two formulas are fitted separately against male and female world-record data. At 60 kg the female coefficient is about 1.11 while the male coefficient at the same weight is about 0.85. This is not a handicap but a normalisation against each gender’s own strength distribution.
- Does the Wilks coefficient always decrease with bodyweight?
- Within the range it was fitted for, yes — heavier lifters get a smaller multiplier. But the 5th-order polynomial turns back upward outside that range, near 155 kg for women and 200 kg for men. Past those points the formula would reward extra bodyweight, so this calculator flags results there as unreliable.
- What is the difference between Wilks and Wilks2?
- Wilks2, introduced in 2020, refits the same polynomial structure against more recent competition data. It shifts scores modestly, generally lowering them for very light and very heavy lifters. This calculator implements the Original 1994 formula, which is still the most widely quoted version.
- Does the IPF still use the Wilks Score?
- No. The International Powerlifting Federation moved to IPF Points in 2019 and then to IPF GL Points, which use a different exponential model and separate coefficients for equipped and raw lifting. Many federations, gyms and online leaderboards still use Original Wilks, which is why it remains the common reference.
- Can I enter my lifts in pounds?
- Yes. Select the imperial unit system and enter bodyweight and lifts in pounds. Both are converted to kilograms internally at 1 lb = 0.45359237 kg before the coefficient is applied, since the Wilks formula is defined only in kilograms.
- Does Wilks work for a single lift instead of a full total?
- It was designed for the three-lift powerlifting total, so a single-lift score is not directly comparable to a full-total score. You can enter a bench-only figure to track your own progress over time, but do not compare that number against three-lift totals.
- Why does my score differ from another Wilks calculator?
- Almost always because of which formula version is in use — Original Wilks, Wilks2, IPF Points and DOTS all produce different numbers from the same lifts. Check which version the other calculator implements. Rounding of the coefficient before multiplying can also shift the result by a fraction of a point.