DOTS Calculator

Two lifters step on the platform. One weighs 59 kg and totals 450 kg. The other weighs 110 kg and totals 620 kg. Who is the stronger athlete, pound for pound? Without a scoring formula, that question has no objective answer.

This guide breaks down every major powerlifting scoring system, explains the math behind each one, and shows you which federations use which formula.

Historical Evolution of Powerlifting Scoring Systems

The earliest attempts at cross-weight comparison used the Schwartz formula for men and the Malone formula for women.

Both were developed before personal computers made large-scale regression analysis practical, so they relied on limited datasets.

The Wilks formula changed that in 1995. It became the dominant standard for roughly 24 years across dozens of federations worldwide.

Then the criticisms accumulated until the IPF replaced it in 2019 and 2020, triggering a split in the sport between federations that followed the IPF and those that turned to Dots.

Limitations of the Wilks Formula in Modern Competition

The Wilks formula was the standard for relative scoring in powerlifting for over two decades, but it carries well-documented mathematical biases that produce unfair outcomes at specific body weights.

Key problems with the Wilks formula:

• The dataset was drawn from equipped single-ply lifting, not raw competition. Raw lifting grew to dominate participation numbers from 2010 onward.
• The women’s sample was too small to produce reliable coefficients. The Wilks formula had been developed with a much smaller women’s sample size than what later became available in modern databases.
• Heavy male athletes received a systematic scoring advantage. The preference given to particularly heavy male athletes was often criticized.

These biases meant that meet directors and federation programmers could not rely on Wilks to produce neutral results across all weight classes simultaneously.

Development of the Dots Coefficient by Tim Konertz

The Dots formula was created by Tim Konertz, a German powerlifter and statistician affiliated with the German Powerlifting Federation (BVDK).

Konertz developed the formula in 2019 with a specific goal: build a coefficient system from a modern, statistically representative dataset that eliminates the known biases of Wilks.

Konertz used polynomial regression on that data to derive a smoothed curve that best fits modern competitive populations.

The formula uses a fifth-degree polynomial in the denominator, similar in structure to Wilks but with updated constants derived from a much larger and more current pool of results.

Key design decisions behind Dots:

• A 4th-degree polynomial instead of Wilks’s 5th-degree. This reduces sensitivity to outlier data points at the extreme ends of the bodyweight range.
• It uses an updated, simpler polynomial and is built against data from drug-tested raw lifters, as opposed to against data from drug-tested single-ply lifters.
• The formula is drop-in compatible with Wilks in terms of input and output format, making federation adoption technically straightforward.
• Separate polynomials for men and women with coefficients calibrated against modern competition data.

Shift from Wilks to Dots

After Konertz published the Dots formula in 2019, several major non-IPF federations reviewed it and moved away from Wilks relatively quickly.

Timeline of adoption:

1. 2019 – Tim Konertz releases the Dots formula through the BVDK.
2. 2019-2020 – The World Raw Powerlifting Federation (WRPF) and the United States Powerlifting Association (USPA) begin evaluating the formula for official use.
3. 2020 – USPA officially adopts Dots as its primary relative scoring system for ranking and Best Lifter awards.
4. 2020-2021 – WRPF and several AWPC-affiliated organizations transition their rulebooks to Dots, retiring Wilks from official competition scoring.

The IPF did not adopt Dots. Instead, the IPF moved through its own internal formula process, landing on the IPF GL formula in 2020 (covered in a later section).

How to Calculate Dots Score?

The Dots score is calculated by multiplying the athlete’s total weight lifted (in kilograms) by a coefficient derived from their body weight.

In practice: 

A lighter athlete has a higher coefficient, boosting their score to account for the natural disadvantage in absolute load. A heavier athlete has a lower coefficient. The formula’s goal is to make equivalent relative efforts produce approximately equal Dots scores regardless of body weight.

Dots Calculation Algorithm

The Dots coefficient for both male and female athletes is calculated with the same formula structure:

$$ \text{Dots Score} = \text{Total Lifted} \cdot \frac{500}{Ax^4 – Bx^3 + Cx^2 – Dx + E} $$

Where x is the athlete’s body weight in kilograms. The constants differ by gender:

Tim Konertz defined valid body weight ranges for each gender:

• For men 40–210 kg (88–463 lb).
• For women 40–150 kg (88–331 lb).

The upper limit for women is lower because the dataset of competitive female lifters above 150 kg is too sparse to produce a statistically reliable curve.
Using the formula outside these bounds gives a coefficient that is not grounded in real competition data and should not be used for official comparison or ranking purposes.

Wilks and Wilks 2020 Systems

The Wilks formula is the formula that defined relative scoring in powerlifting from the mid-1990s onward.

It was the official standard for the IPF and most major federations for over two decades. In 2020, an updated version  often called Wilks 2020 or Wilks-2 was introduced with recalibrated constants.

Both versions use the same polynomial structure but differ in their underlying datasets and resulting constants.

Original Wilks Polynomial Equation Variables

The original Wilks formula was developed by Robert Wilks of Powerlifting Australia in 1994. The formula uses a fifth-degree polynomial regression, meaning it fits a curve through data using a polynomial with terms up to x⁵.

The general structure of the Wilks coefficient is:

$$\text{Wilks Original} = \text{Total Lifted} \cdot \frac{500}{Ax^5 + Bx^4 + Cx^3 + Dx^2 + Ex + F}$$

Where x is the athlete’s body weight in kilograms, and the constants are:

The formula was built on competitive data from the early 1990s. At that time the dataset of competitive powerlifters was far smaller and less diverse than today’s. This contributed to the formula’s later statistical shortcomings.

Modifications in the Revised Wilks 2020 Formula

The Wilks 2020 revision (also referred to as Wilks-2) was introduced to address the degraded accuracy of the original formula.

The update used a larger and more current dataset to re-run the polynomial regression and produce new constants.

$$\text{Wilks 2020} = \text{Total Lifted} \cdot \frac{600}{Ax^5 + Bx^4 + Cx^3 + Dx^2 + Ex + F}$$

Where x is the athlete’s body weight in kilograms, and the constants are:

The Wilks 2 formula aims to address some of the criticisms of the original Wilks formula, particularly the perceived bias towards extremely light and heavy lifters.

In the 2020 IPF statistical evaluation, Wilks 2 ranked third overall across the combined scoring criteria, behind IPF GL in first and Dots in second.

IPF and IPF GL Scoring Systems

The International Powerlifting Federation (IPF) has used multiple scoring systems since retiring Wilks after the 2018 season. The current IPF system is the GL formula, introduced in May 2020. 

Before GL, the IPF used a transitional formula from 2018 to 2020 that was criticized for its mathematical complexity and poor practical properties.

2018 IPF Formula

The 2018 IPF Formula uses a logarithmic equation. For a given competition type, the score is calculated as:

$$\text{IPF 2018} = 500 + 100 \cdot \text{$\frac{Total\,Lifted\,- (A \cdot Ln(Bw)\,- B)}{C \cdot Ln(Bw)\,- D}$}$$

Where ln is the natural logarithm, Total Lifted is the sum of best squat, bench press, Bw is the athlete’s body weight, and deadlift in kg, and C1–C4 are competition-specific constants from the table below.

In the 2020 IPF evaluation, the original IPF formula placed last overall across all scoring criteria, behind GL, Dots, Wilks 2, and original Wilks.

2020 IPF GL Points Calculations

The IPF GL formula was announced and adopted from May 1, 2020. The “GL” designation stands for Goodlift, the name of the official IPF scoring software system developed by the team that created the formula.

The IPF GL formula uses the following structure:

$$\text{IPF GL} = \text{Total Lifted} \cdot \frac{100}{A – B \cdot e^{-C \cdot Bw}}$$

Where Bw is the athlete’s body weight, e is the base of the natural logarithm, and A, B, C are constants specific to the competition category.

The constants are determined for all combinations of competitions that are officially used in the IPF.

The full table of constants:

Cross System Formula Comparison

No single formula is universally adopted across all powerlifting federations. Each system reflects different mathematical assumptions and different source datasets. This section breaks down how the formulas compare in practice.

Weight Class Bias Analysis Across Formulas

Every relative scoring formula carries some degree of bias. The question is how much and where it appears on the body weight curve.

The IPF’s own statistical evaluation from March 2020 tested all five major formulas against real competition data using two metrics:

1. Coefficient of variation (how consistently the formula scores equivalent efforts across weight classes).
2. Rank correlation (how reliably the formula orders lifters by actual performance level).

Lower coefficient of variation and higher rank correlation both indicate a more neutral formula.

Results across all eight competition categories (men’s/women’s, raw/equipped, total/bench):

Key findings from the data:

• Wilks systematically overscores male middleweights and female super-heavyweights due to the shape of its 1994 regression curve.
• Wilks-2 reduces this bias but does not eliminate it.
• Dots produces a flatter curve across body weights and outperforms both Wilks versions on both metrics.
• IPF GL scores best overall but is calibrated exclusively against IPF competition data, which limits its validity outside that context.
• The 2018 IPF formula performed worst of all five systems despite being the official IPF standard at the time of the evaluation.

Federation Adoption Overview for Each System

The IPF and all its national affiliates (including USAPL, IPF Canada, British Powerlifting, etc.) use IPF GL exclusively.

All other major open federations have either adopted Dots or are in transition. Wilks is still in use in some smaller or older federations.

FAQ

• What is a good Dots score for an intermediate powerlifter?

Dots classifications generally align with: under 200 (beginner), 200-300 (intermediate), 300-400 (advanced), 400-500 (elite), and 500+ (world-class). An intermediate competitive lifter typically falls in the 250-350 range depending on weight class and sex.

• Why did many federations replace Wilks with Dots?

The Wilks formula systematically overscored male middleweights and female super-heavyweights due to the shape of its regression curve. Dots was built on modern competition data and produces more neutral curve across body weights. Federations switched to reduce structural bias in Best Lifter awards and ranking systems.

• Is the Dots formula biased toward specific bodyweights?

Dots is currently the most statistically neutral polynomial formula available for non-IPF use. According to the IPF’s own 2020 evaluation, Dots outperformed both Wilks versions on coefficient of variation and rank correlation metrics. That said, any polynomial formula fitted to real-world data carries residual noise. At extreme body weights (below 50 kg or above 140 kg) the curve may not perfectly represent the population, since data is sparse at those ranges.

• Can Dots be used to compare raw and equipped lifting results?

The Dots formula is primarily designed for raw (unequipped) lifting and total scores. The standard Dots formula does not factor equipment type into the calculation. Comparing raw and equipped results using Dots is possible numerically but is not methodologically recommended, since equipped lifting produces higher totals by design.

• Does the Dots calculator account for athlete age?

The standard Dots formula does not include an age correction. It uses bodyweight and sex as the only inputs. For age-adjusted scoring, federations typically apply a separate age coefficient (such as McCulloch) on top of the base formula.

• Which powerlifting federations currently use the Dots system?

Dots is used by USAPL, USPA, and numerous non-IPF federations. The BVDK and Swiss Powerlifting adopted Dots in 2020 for both individual and team competitions. The IPF and its direct affiliates use IPF GL Points instead.

References:

• https://www.powerlifting.sport/fileadmin/ipf/data/ipf-formula/Models_Evaluation-I-2020.pdf
• https://www.powerlifting.sport/fileadmin/ipf/data/ipf-formula/IPF_GL_Coefficients-2020.pdf
• https://pmc.ncbi.nlm.nih.gov/articles/PMC7523908/
• https://journals.lww.com/acsm-msse/fulltext/1999/12000/validation_of_the_wilks_powerlifting_formula.27.aspx
• https://www.powerlifting.sport/rules/codes/info/ipf-formula
• https://www.powerlifting.sport/fileadmin/ipf/data/ipf-formula/Announcement_IPF_GL_Formula_2020_1_.pdf
• https://de.wikipedia.org/wiki/DOTS-Relativwertung