Wilks, DOTS & IPF GL: How Powerlifting Scores Compare Lifters Across Weight Classes

A 130 kg lifter deadlifts 300 kg and a 60 kg lifter deadlifts 240 kg. Who is stronger? In raw kilograms the answer is obvious, but it’s also the wrong question. The smaller lifter is moving four times their body weight; the larger lifter is moving a little over twice theirs. Powerlifting has spent forty years building coefficients to answer the real question — pound for pound, who put up the better number — and the three that survive today are Wilks, DOTS and IPF GL points. They disagree often enough that knowing which one a meet uses, and why, changes who wins a “best lifter” award.

Why raw totals can’t rank a field

Strength does not scale linearly with body weight. A lifter who is twice as heavy is not twice as strong, because muscle force grows roughly with cross-sectional area (a squared term) while body weight grows with volume (a cubed term). That mismatch is the whole reason heavyweights post bigger absolute totals but lighter lifters dominate any “strength per kilo” measure. To compare a 59 kg lifter against a 120 kg lifter fairly, you need a curve that says “here is the expected total at every body weight,” then scores each lifter against that curve.

Every formula on this page does the same three things. It takes your competition total — the sum of your best squat, bench press and deadlift — multiplies it by a fixed scaling constant, and divides by a body-weight polynomial (or, for IPF GL, an exponential) tuned separately for men and women. The output is a unitless score where higher is better and where, by design, an elite lifter lands somewhere around 450–500 regardless of their weight class. The disagreements live entirely in the shape of that body-weight curve.

Wilks 2020: the long-running standard, recalibrated

The original Wilks coefficient, designed by Robert Wilks in the 1990s, was the sport’s lingua franca for two decades. In 2020 it was refit against a much larger, more modern dataset and re-centred so that a top score sits near 500 rather than the old ~500-but-drifting scale. The version most calculators now use — including this one — is Wilks 2020:

Wilks = total × 600 / (a + b·x + c·x² + d·x³ + e·x⁴ + f·x⁵)

where x is body weight in kilograms and a through f are sex-specific coefficients. The fifth-degree polynomial is what lets Wilks bend gently at the extremes — it’s flexible enough to avoid badly over- or under-rewarding the very lightest and very heaviest competitors. The single most important practical detail: body weight is always in kg. If you train in pounds you must convert first (divide by 2.20462), which the Wilks, DOTS & IPF GL Calculator does for you when you switch the unit toggle — get this wrong and your score is off by more than a factor of two.

DOTS: a simpler curve that’s kinder to the lightest lifters

DOTS (sometimes written D.O.T.S.) was developed as an open, transparent alternative and is now the default in several federations. Its formula is structurally similar but uses a fourth-degree polynomial and a scaling constant of 500:

DOTS = total × 500 / (a + b·x + c·x² + d·x³ + e·x⁴)

The lower-order curve behaves a little differently at the tails. In practice DOTS tends to be slightly more generous to very light lifters and to women than Wilks 2020, while the two agree closely through the middle weight classes where most lifters sit. Neither is “more correct” in an absolute sense — they are different statistical fits to different populations — but if you are a 52 kg or 56 kg competitor, you’ll usually post a marginally higher DOTS than Wilks, and that gap can decide a close best-lifter placing.

IPF GL points: the federation’s own exponential

The International Powerlifting Federation moved away from polynomial Wilks to its own Goodlift formula, now branded IPF GL points. Instead of a polynomial it uses an exponential decay curve:

IPF GL = total × 100 / (A − B·e^(−C·x))

with A, B and C calibrated per sex (and, in the official tables, per equipment and per lift type — raw “classic” versus single-ply “equipped”). The calculator here uses the raw classic coefficients as a close approximation. The exponential shape means the expected-total curve flattens out hard at the heavy end: beyond roughly 120 kg of body weight, adding mass buys you very little expected total, so super-heavyweights are scored against an almost flat ceiling. That is a deliberate policy choice — the IPF wanted a curve that didn’t reward simply getting heavier — and it’s why a 140 kg lifter’s GL points can look low relative to their Wilks.

Reading a head-to-head comparison

Because the three formulas use different curves, two lifters can swap places depending on which one you read. Consider a 75 kg man with a 600 kg total against a 110 kg man with a 760 kg total. The lighter lifter usually wins on all three pound-for-pound scores, but the margin shrinks under IPF GL (which is less punishing to the heavier lifter at that weight) and widens under DOTS. The calculator’s compare mode puts both lifters’ Wilks, DOTS and IPF GL side by side in one table precisely so you can see whether your advantage is robust across all three systems or an artefact of the one your meet happens to use.

A few honest caveats worth keeping in mind. None of these scores account for age — masters and sub-junior lifters use separate age-adjustment factors (McCulloch / Foster) layered on top. None of them distinguish raw from equipped lifting unless you’re using the equipment-specific IPF coefficients. And all of them are population fits, so they encode the body-composition and selection biases of the dataset they were built on. They are tools for ranking a field on the day, not verdicts on who has the better genetics.

How to actually use the score

If you’re prepping for a meet, find out which coefficient that federation scores best-lifter on — it is increasingly DOTS or IPF GL, less often Wilks 2020 — and track that number across your training blocks so your target is the one that counts. If you’re just chasing a personal milestone, pick one formula and stay consistent; the absolute value matters less than watching it climb as your total rises faster than your body weight. A score that goes up while you stay in the same weight class is the cleanest single proof that you got stronger rather than just bigger.

Enter your squat, bench, deadlift and body weight into the Wilks, DOTS & IPF GL Calculator to see all three scores at once, then flip on compare mode to settle the pound-for-pound argument with a training partner. Pair it with the One Rep Max Calculator to turn your latest top sets into the maxes that feed your total, and the Barbell Plate Loading Calculator to dial in the exact plates for your next attempt. Strength is personal, but once you correct for body weight it’s finally comparable — and these coefficients are how the sport does it.