Wilks Calculator

Calculate Your Wilks Score

Enter your details below to calculate your Wilks score, a key metric for comparing strength levels in powerlifting.

Your Wilks Score Is:

331.45

This score is calculated using the official Wilks formula, which standardizes your powerlifting total against your body weight and gender.

Wilks Formula Coefficients

Variable	Men	Women
a	-216.0475144	594.31747775582
b	16.2606339	-27.23842536447
c	-0.002388645	0.82112226871
d	-0.00113732	-0.00930733913
e	7.01863E-06	4.731582E-05
f	-1.291E-08	-9.054E-08

The coefficients used in the polynomial Wilks formula for men and women.

What is the Wilks Calculator?

The Wilks Calculator is a specialized tool used in the sport of powerlifting to measure the relative strength of lifters. Developed by Robert Wilks, the CEO of Powerlifting Australia, it provides a standardized score that allows for the comparison of athletes across different body weight categories and genders. Before the Wilks formula, it was nearly impossible to definitively say whether a 120 kg male lifter was “stronger” than a 60 kg female lifter. The Wilks Calculator solves this by generating a score that levels the playing field. This makes the Wilks Calculator an indispensable part of powerlifting competitions and for personal progress tracking.

Essentially, anyone involved in strength training can use the Wilks Calculator. While it’s a staple in competitive powerlifting, amateur lifters and coaches also use it to gauge progress beyond raw weight increases. A common misconception is that a higher Wilks score always means a better lifter overall. While it denotes superior pound-for-pound strength, factors like technique, experience, and performance on meet day are also crucial. The Wilks Calculator is a mathematical tool, not a final judgment on an athlete’s entire career.

Wilks Calculator Formula and Mathematical Explanation

The core of the Wilks Calculator is a 6th-order polynomial formula. It takes the total weight lifted and multiplies it by a coefficient that is derived from the lifter’s body weight. The formula itself is:

Score = (500 * Total_Weight_Lifted_kg) / (a + b*x + c*x² + d*x³ + e*x⁴ + f*x⁵)

Where ‘x’ is the lifter’s body weight in kilograms. The variables a, b, c, d, e, and f are specific coefficients that differ for men and women, reflecting physiological differences in strength potential. This sophisticated approach ensures that the Wilks Calculator provides a fair and accurate relative strength score. For a detailed breakdown of your lifting potential, you might also consider using a one rep max calculator.

Variables Table

Variable	Meaning	Unit	Typical Range
x	Lifter’s Body Weight	kg	40 – 200+
Total Weight Lifted	Sum of max Squat, Bench, and Deadlift	kg	100 – 1200+
a, b, c, d, e, f	Wilks Coefficients	Dimensionless	Fixed values (see table above)
Score	Calculated Wilks Score	Points	100 – 650+

Practical Examples (Real-World Use Cases)

Understanding the Wilks Calculator is best done through examples. Let’s compare two lifters.

Example 1: Male vs. Female Lifter

• Lifter A (Female): Body weight 60 kg, Total lifted 350 kg.
• Lifter B (Male): Body weight 90 kg, Total lifted 550 kg.

Using the Wilks Calculator, Lifter A achieves a Wilks score of approximately 391. Lifter B achieves a score of approximately 358. Despite lifting 200 kg less, Lifter A is considered stronger on a pound-for-pound basis according to the Wilks Calculator. This demonstrates how the calculator enables fair competition.

Example 2: Tracking Personal Progress

• Lifter C (Male): Meet 1: Body weight 85 kg, Total lifted 500 kg.
• Lifter C (Male): Meet 2 (six months later): Body weight 83 kg, Total lifted 510 kg.

In Meet 1, his Wilks score is 336. In Meet 2, after losing some weight and increasing his total, his score jumps to 350. The Wilks Calculator clearly shows his relative strength has significantly improved, more than the raw 10 kg increase on his total might suggest. This is a powerful motivator. Understanding your body fat percentage calculator can also help optimize body composition for better scores.

How to Use This Wilks Calculator

This Wilks Calculator is designed for simplicity and accuracy. Follow these steps to get your score:

1. Select Your Units: Choose between ‘Metric (kg)’ or ‘Imperial (lbs)’. The calculator handles conversions automatically.
2. Choose Your Gender: Select ‘Male’ or ‘Female’ to apply the correct coefficients for the Wilks Calculator.
3. Enter Your Body Weight: Input your precise body weight in the selected unit.
4. Enter Total Weight Lifted: Input the sum of your best squat, bench press, and deadlift.
5. Read the Results: The calculator instantly provides your Wilks score, the coefficient used, and your body weight in kg. The chart will also update to show where you stand.

A higher score from the Wilks Calculator indicates greater pound-for-pound strength. Comparing your score over time is an excellent way to track progress. For more advanced comparisons, some federations are transitioning to a new IPF points calculator.

Key Factors That Affect Wilks Calculator Results

Several factors influence your final score from the Wilks Calculator. Understanding them can help you strategize your training and competition approach.

1. Total Weight Lifted: This is the most direct factor. Increasing your squat, bench, or deadlift will always increase your Wilks score, assuming body weight stays constant.
2. Body Weight: A lower body weight results in a higher (more favorable) coefficient. This means that if two people lift the same total, the lighter person will have a higher score. This is the core principle of the Wilks Calculator.
3. Gender: Men and women have different coefficient sets, reflecting inherent physiological differences in muscle mass and strength potential.
4. Training Technique and Efficiency: Improving your lifting form can allow you to lift more weight without gaining mass, directly improving your Wilks Calculator score. This is a key focus for competitive lifters.
5. Body Composition: A lifter with lower body fat at the same body weight as another lifter typically has more muscle mass, and thus a higher potential for strength. Managing diet with a calorie intake calculator is crucial.
6. Federation Standards: While the Wilks Calculator is standard, rules on equipment (e.g., raw, wraps, equipped) can affect the total you can lift, which in turn impacts your score.

Frequently Asked Questions (FAQ)

1. What is a good Wilks score?

A “good” score is subjective, but generally, 300 is considered solid for a regular gym-goer, 400 is a mark of a strong, competitive lifter, and 500+ is typically elite, national, or international level.

2. Does the Wilks Calculator use different formulas for men and women?

Yes. The formula’s structure is the same, but the six coefficients (a, b, c, d, e, f) are completely different for men and women to ensure a fair comparison.

3. How can I improve my Wilks score?

You can either increase your total lifted weight or decrease your body weight while maintaining your strength. The most effective method is to get stronger through consistent training. This is why many use a dedicated Wilks Calculator to track progress.

4. Is the Wilks formula still used in all powerlifting federations?

While historically the standard, some federations like the International Powerlifting Federation (IPF) have transitioned to newer formulas like IPF GL Points. However, the Wilks formula is still widely used and understood in the community.

5. Why does my Wilks score differ slightly between calculators?

Minor differences can arise from rounding of coefficients or using older versions of the formula. This Wilks Calculator uses the most widely accepted and modern coefficients for maximum accuracy.

6. Can I use the Wilks Calculator for a single lift?

Traditionally, the Wilks Calculator is used for the three-lift total (squat, bench, deadlift). However, it can be used to compare single lifts, though this is a less common application.

7. Does age affect the Wilks score?

The standard Wilks formula does not factor in age. However, separate age-adjusted formulas (like the McCulloch or Foster formulas) do exist for masters-level lifters.

8. What is the Wilks Coefficient?

It is the multiplier derived from your body weight using the polynomial formula. This coefficient is then multiplied by your lifting total to get the final score. Lighter lifters get a higher coefficient from the Wilks Calculator.