What this calculator does
Wilks score (powerlifting) works out bodyweight-adjusted strength score for comparing lifters across weight classes. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaWilks = (500 / (a+bx+cx²+dx³+ex⁴+fx⁵)) × total lifted, x = bodyweight kg, coefficients differ by sex
The inputs explained
| Field | What to enter |
|---|---|
| Bodyweight (kg) | A number, measured in kg. Starts at 83. |
| Total lifted (kg) | A number, measured in kg. Starts at 500. |
| Sex | Choose from Male, Female. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with bodyweight
Every other input is held at the calculator’s starting values while bodyweight varies. Select any row to load that scenario into the calculator.