Wilks Coefficient Calculator Guide: IPF 2020 Formula, Strength Bands

The formula

bw is bodyweight in kilograms, total is the sum of best squat, bench press and deadlift attempts — also in kilograms. The five constants A–E differ between men and women. The IPF publishes them annually.

Example: 83 kg male lifter, 600 kg total (IPF 2020). Polynomial denominator ≈ 796 → score ≈ 452. That puts the lifter solidly in the Elite band — world-class numbers for the class.

The five strength bands

The bands apply to both sexes because Wilks already adjusts for sex. A 350 score for a woman represents the same "advanced" tier as a 350 score for a man.

Wilks 1994 vs IPF 2020

Robert Wilks published the original polynomial in 1994 — fit to the world records of the time. Over the decades the records grew (especially in women's lifting and super-heavyweight men), and the old coefficients no longer matched. The IPF committee refit the polynomial in 2020.

Practically: lifters in the upper weight classes score slightly higher under Wilks 2020 than under the 1994 version; mid-weight scores are nearly unchanged. When reading historical Wilks comparisons, check which version was used.

What Wilks does not capture

• →Equipment: single-ply and multi-ply gear add kilos. Wilks is intended for raw classic.
• →Age: junior and masters lifters get separate age-adjusted factors (McCulloch / Foster).
• →Training age: a 200 after six months is impressive; the same score after ten years is not. Wilks knows neither.
• →Single-lift athletes: bench-only specialists should use lift-specific scoring like the IPF bench coefficient.

Wilks, DOTS or GL points?

Three scoring systems dominate strength sports:

• →Wilks 2020 (IPF): current official IPF scoring for raw classic.
• →DOTS: similar polynomial form, common in USAPL and North-American federations.
• →GL points (Goodlift): the newer IPF scoring used for equipped lifting.

For most lifters all three return very similar rankings. Differences show up mostly in the extreme weight classes or in equipped vs raw.

Related topics

Raising your Wilks score is about maximal strength. Useful companions: the One-Rep-Max Calculator estimates your true 1RM from multi-rep sets — the foundation for programming squat, bench and deadlift. The Lean Body Mass Calculator returns fat-free mass — Wilks per kilogram of lean mass is often more informative than the raw Wilks score. If you're planning a new weight class, track progress with the BMI Calculator and the Body Fat Calculator .

Takeaway

The Wilks coefficient is the quickest answer to "who lifts the most for their size?". One polynomial, five constants, one score — and lifters from every weight class stand on the same scale.

IPF 2020 is the version that counts today. 400+ is elite, 300+ a seasoned competitor. Tracking the score across years reveals the kind of long-arc progress that weekly training logs hide.