DOTS vs Wilks vs IPF GL: Which Powerlifting Formula Is Fairest?

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By Bikash Roy

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Bikash Roy

Online Research Specialist · SEO Strategist · Web Developer

Bikash personally verifies every calculator against official standards (WHO, NIH, government data). Online research specialist, SEO strategist, and web developer with 10+ years building accurate digital tools.

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· May 29, 2026

Three Formulas, One Goal

Every powerlifting scoring formula tries to answer the same question: how do you compare a 59 kg lifter’s 430 kg total to a 120 kg lifter’s 700 kg total? The answer requires a mathematical model of how strength scales with bodyweight.

Three formulas dominate the sport today. Each uses a different approach, produces different results at extreme bodyweights, and is used by different federations.

Calculate your score in all three with the DOTS Calculator.

Formula Overview

Wilks: The Original Standard

Robert Wilks developed the Wilks formula in the 1990s for the IPF. It became the default bodyweight-normalization tool across virtually every federation globally for nearly three decades.

Formula:

Wilks = Total × 600 / (a + b·BW + c·BW² + d·BW³ + e·BW⁴ + f·BW⁵)

The 5th-degree polynomial fitted well to competition data available at the time, but data coverage at extreme bodyweights (very light < 56 kg, very heavy > 125 kg) was thin in the original dataset.

Known Wilks bias: The formula systematically over-scores lifters in the 82–100 kg bodyweight range and under-scores lifters at the extremes. A 90 kg lifter with the same relative strength as a 60 kg lifter would receive a meaningfully higher Wilks score. This became a growing criticism as the sport expanded and competition data at all bodyweights became more available.

Wilks-2 (2020): An updated version recalibrated with more modern data, correcting some of the extreme bodyweight issues. Still widely used outside IPF.

DOTS: The Corrected 2019 Alternative

DOTS was introduced in 2019 to address the Wilks bias using a more modern dataset covering all weight classes more evenly.

Formula:

DOTS = Total × 500 / (a·BW⁴ + b·BW³ + c·BW² + d·BW + e)

Key design differences from Wilks:

• 4th-degree instead of 5th-degree polynomial (fewer terms, less overfitting risk at extremes)
• Separate male and female coefficients fitted independently
• Bodyweight clamped at upper limits (210 kg male, 150 kg female) to prevent extrapolation

DOTS vs Wilks at various bodyweights (same total):

This table shows how scores diverge when the same raw total is scored by each formula:

Wilks systematically gives higher scores to mid-range bodyweights (74–100 kg). DOTS more evenly distributes scores across the full range.

IPF GL: The Data-Driven Federation Formula

IPF GL (GoodLift) points replaced Wilks at the IPF in 2020. It uses an exponential (not polynomial) structure and was calibrated specifically against large IPF competition datasets.

Formula structure (raw male example):

IPF GL = Total × 100 / (1236.25115 − 1449.21864 × e^(−0.01644 × BW))

Separate formulas exist for: male/female × raw/equipped.

IPF GL design principles:

• Calibrated against IPF-specific competition data, which is the largest drug-tested dataset
• Exponential curve rather than polynomial — better behavior at extreme bodyweights
• Scores are on a 0–100+ scale (not 300–600 like DOTS) making absolute numbers less intuitive

IPF GL weakness: It is calibrated exclusively against IPF competition data. This makes it highly accurate within IPF contexts but potentially less valid for comparing lifters in other federations (USAPL, USPA, CPU, etc.) where drug testing, equipment rules, and judging standards differ.

Federation Usage

If you compete in USAPL or USPA, DOTS is your official formula. If you compete at IPF World Championships or IPF-affiliated internationals, IPF GL is your official formula.

Side-by-Side Comparison: Same Lifter, All Three Formulas

Male, 83 kg, total 560 kg:

Male, 59 kg, total 420 kg:

The difference is most pronounced at lighter bodyweights: a 59 kg lifter scores roughly 16 Wilks points lower than DOTS for the same total — enough to shift federation rankings at national meets.

The IPF’s 2020 Statistical Evaluation

The IPF commissioned an independent evaluation of all major formulas in 2020. Key findings (summarized):

• IPF GL performed best overall in statistical fit against IPF competition data
• DOTS outperformed Wilks at extreme bodyweights
• Wilks-2 improved on original Wilks but remained inferior to both DOTS and IPF GL
• No formula is “perfect” — all are approximations with residual bias

The IPF adopted GL for its own competitions but the evaluation specifically noted DOTS as the best alternative for contexts outside the IPF dataset.

Which Formula Should You Use?

For individual progress tracking and comparing yourself to others regardless of federation, DOTS is the most practical choice — it’s accurate across all bodyweights, stable, and now the standard for two of the three major US federations.

For deeper analysis of the DOTS formula itself, see the DOTS Coefficient Formula Reference. To set goals based on your current DOTS tier, use the DOTS Goal-Setting Guide.

If you pair powerlifting with aerobic conditioning, the Rucking Calorie Calculator quantifies your conditioning workload just as precisely as DOTS quantifies your strength.