Wilks Calculator

What a powerlifting coefficient score actually does

Strength does not scale in a straight line with bodyweight. Double a lifter's mass and you do not double what they can squat, because muscle cross-section grows roughly with the square of a linear dimension while body mass grows with the cube. That is why a 60 kg woman totalling 400 kg and a 120 kg man totalling 700 kg cannot be ranked by their totals alone. A coefficient formula fixes the problem by fitting a curve to thousands of competition results, then dividing each total by the value that curve predicts for that bodyweight. The output is a single number: how far above or below the expected total for your size you lifted.

This calculator gives you two of them. DOTS is the current default at most federations and in most meet software. Wilks-2 (the 2020 refit of the original 1994 Wilks formula) is shown alongside it because plenty of gyms, coaches and old spreadsheets still speak Wilks. Both take the same three inputs: sex, bodyweight and total.

Worked example: an 82.5 kg man with a 500 kg total

That is 181.9 lb bodyweight and roughly a 175 kg squat, 120 kg bench and 205 kg deadlift. The DOTS denominator is a fourth-order polynomial in bodyweight; at 82.5 kg it evaluates to 738.12. The score is total × 500 ÷ 738.12 = 500 × 500 ÷ 738.12 = 338.70 DOTS.

The Wilks-2 denominator is a fifth-order polynomial and comes out at 745.86, giving 500 × 600 ÷ 745.86 = 402.22 Wilks-2. The same lifter under the original 1994 Wilks formula scores 334.95. Notice what happened: Wilks-2 is not a small correction to Wilks, it is roughly 20 percent higher across the board because the 2020 refit changed the numerator from 500 to 600. Never compare a Wilks-2 number to a classic Wilks number, and never compare either to DOTS. Within one formula the comparison is fair; across formulas it is noise.

Second example: a 60 kg woman with a 400 kg total

Her DOTS denominator is 451.04, so 400 × 500 ÷ 451.04 = 443.42 DOTS, and her Wilks-2 works out to 527.61. She lifted 100 kg less than the man in the first example and scores more than a hundred DOTS points above him. That is the whole point of the exercise — pound for pound she is doing considerably more with the frame she has, and a best-lifter award decided on totals alone would never show it.

Reading the level bands honestly

The band shown with your result splits DOTS at 200, 300, 400 and 500: novice, intermediate, advanced, elite, world class. These are gym-culture shorthand, not official classifications. No federation issues a "DOTS 400 certificate", and the same number means slightly different things in raw versus equipped divisions, in tested versus untested feds, and across age brackets. As a rough calibration for raw, drug-tested lifters: a first meet often lands somewhere in the 200s, a few serious years of training push into the 300s, national-level competitors cluster in the low-to-mid 400s, and the podium at a world championship generally starts above 500. Use the band as orientation, not identity.

Where these formulas came from

Robert Wilks built the original coefficient in the early 1990s from IPF results, and it ran the sport for two decades. By the 2010s its shortcomings were well known: it treated the heaviest and lightest classes unevenly, and the men's and women's curves had drifted apart from actual results as the sport grew. Two answers appeared almost at once. The 2020 Wilks refit kept the same five-term polynomial shape and re-estimated the constants. DOTS, derived by Tim Konertz, re-fitted a fourth-order polynomial to a far larger modern data set and produced a curve most people find better behaved at the extremes. Meanwhile the IPF moved to its own GL points system for its sanctioned meets. If your federation names a formula, use that one; if nobody has told you, quote DOTS.

Limits worth knowing before you post the number

A coefficient is a scoreboard, not a training program. It says nothing about whether your bench is lagging your squat, whether your technique will survive heavier weight, or what to do next Monday. It also does not adjust for age, equipment, drug-testing status or federation standards, so an untested equipped total and a tested raw total scoring the same DOTS are not the same performance. Junior and masters lifters typically apply an additional age coefficient on top.

One last practical note: enter your weigh-in bodyweight, not your walking-around weight. In most federations that is your weight at the official weigh-in, two hours or twenty-four hours before you lift depending on the rules, and it is usually the lowest number you will see all week. Using a scale reading from a random Tuesday can move your score by several points in either direction, which matters when qualifying standards are written in DOTS.