Wilks Formula Calculator
The Wilks Formula is used in powerlifting to compare the strength of lifters across different body weights. Enter your body weight, the weight you lifted (e.g., your one-rep max total for squat, bench, and deadlift), and select your gender to calculate your Wilks score.
Enter your current body weight in kilograms.
Enter the total weight lifted (e.g., your 1RM total) in kilograms.
Select your gender for the correct formula coefficients.
| Body Weight (kg) | Weight Lifted (kg) | Gender | Wilks Score |
|---|---|---|---|
| 60 | 300 | Male | 251 |
| 60 | 200 | Female | 231 |
| 80 | 450 | Male | 320 |
| 80 | 300 | Female | 301 |
| 100 | 600 | Male | 386 |
| 100 | 400 | Female | 364 |
What is the Wilks Formula?
The Wilks Formula is a coefficient-based system used primarily in the sport of powerlifting to compare the strength of lifters of different body weights and genders. It was developed by Robert Wilks of Powerlifting Australia. The formula calculates a “Wilks Score,” which represents a lifter’s relative strength. The higher the Wilks score, the stronger the lifter is considered to be, pound-for-pound. This allows for a fair comparison between a lighter lifter lifting a certain weight and a heavier lifter lifting a proportionally heavier weight. Our Wilks Formula Calculator implements this standard formula.
It’s used in many powerlifting federations to determine the best overall lifter in a competition, irrespective of body weight class. The Wilks Formula Calculator is a valuable tool for athletes wanting to track their pound-for-pound strength progress or compare themselves to others.
Common misconceptions include thinking it directly measures absolute strength (it measures relative strength) or that it’s the only formula available (others like IPF GL points or DOTS score exist, though Wilks is very popular). Our Wilks Formula Calculator uses the standard coefficients.
Wilks Formula and Mathematical Explanation
The Wilks score is calculated by multiplying the weight lifted by a coefficient derived from the lifter’s body weight and gender.
The formula for the coefficient is:
Coefficient = 500 / (a + b*x + c*x² + d*x³ + e*x⁴ + f*x⁵)
where ‘x’ is the lifter’s body weight in kilograms, and a, b, c, d, e, f are coefficients specific to gender.
Wilks Score = Coefficient * Weight Lifted (kg)
The coefficients are different for men and women:
- Men: a=-216.0475144, b=16.2606339, c=-0.002388645, d=-0.00113732, e=7.01863E-06, f=-1.291E-08
- Women: a=594.31747775582, b=-27.23842536447, c=0.82112226871, d=-0.00930733913, e=4.731582E-05, f=-9.054E-08
Our Wilks Formula Calculator uses these exact values.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| x | Body Weight | kg | 40 – 200+ |
| Weight Lifted | Total weight lifted (e.g., 3-lift total) | kg | 50 – 1000+ |
| a, b, c, d, e, f | Coefficients | N/A | Fixed values based on gender |
| Coefficient | Wilks Coefficient | N/A | 0.5 – 1.5 (approx) |
| Wilks Score | Calculated relative strength score | Points | 100 – 700+ |
Practical Examples (Real-World Use Cases)
Let’s see how the Wilks Formula Calculator works with some examples:
Example 1: Male Lifter
- Body Weight: 83 kg
- Total Lifted (Squat + Bench + Deadlift): 600 kg
- Gender: Male
Using the Wilks Formula Calculator, the coefficients for males are applied to the 83kg body weight, resulting in a coefficient of approximately 0.6586. The Wilks Score would be 0.6586 * 600 = 395.16.
Example 2: Female Lifter
- Body Weight: 63 kg
- Total Lifted (Squat + Bench + Deadlift): 350 kg
- Gender: Female
Using the Wilks Formula Calculator, the coefficients for females are applied to the 63kg body weight, giving a coefficient of approximately 1.0776. The Wilks Score would be 1.0776 * 350 = 377.16.
In this case, even though the male lifted much more absolute weight, their Wilks scores are relatively close, indicating comparable pound-for-pound strength according to this formula.
How to Use This Wilks Formula Calculator
- Enter Body Weight: Input your body weight accurately in kilograms (kg) into the “Your Body Weight (kg)” field.
- Enter Weight Lifted: Input the total weight you lifted in kilograms (kg) into the “Weight Lifted (kg)” field. This is typically your one-rep max total for squat, bench press, and deadlift in a competition, but can be any lift you want to score.
- Select Gender: Choose either “Male” or “Female” from the dropdown menu, as the formula uses different coefficients for each.
- View Results: The calculator will automatically update and display your Wilks Score, the calculated Wilks coefficient, and the formula used.
- Reset: Click the “Reset” button to clear the inputs and go back to the default values.
- Copy Results: Click “Copy Results” to copy the score and inputs to your clipboard.
- Interpret Score: A higher Wilks score indicates greater relative strength. You can use it to compare your performance over time or against other lifters of different body weights.
Key Factors That Affect Wilks Score Results
Several factors influence your Wilks score, which our Wilks Formula Calculator helps quantify:
- Body Weight: The formula is designed to adjust for body weight, but your body composition (muscle vs. fat) at a given weight significantly impacts strength.
- Weight Lifted: This is the most direct factor – lifting more weight at the same body weight increases your score.
- Gender: Men and women have different physiological characteristics leading to different strength potentials and thus different coefficients in the formula.
- Training and Technique: Effective training programs and efficient lifting technique directly improve the weight you can lift, thus boosting your Wilks score. See our training programs page for ideas.
- Age: While not directly in the formula, age often correlates with strength potential and recovery, indirectly affecting the weight lifted. There are age-adjusted formulas sometimes used.
- Experience Level: More experienced lifters generally have better technique and higher strength levels for their body weight.
- Federation Standards: While the Wilks formula is common, some federations are moving to other formulas like IPF GL points or DOTS.
Understanding these helps you interpret your score from the Wilks Formula Calculator.
Frequently Asked Questions (FAQ)
- What is a good Wilks score?
- A “good” score is relative. Scores over 300 are generally considered decent for amateur lifters, 400+ is very good, and 500+ is elite. For women, good scores might start slightly lower but scale similarly. Check strength standards for more context.
- Is the Wilks formula the only one?
- No, other formulas like the IPF GL Points, DOTS score, and Schwartz/Malone formulas also exist to compare lifters. Wilks is one of the most well-known and widely used, but some federations are adopting others.
- Can I use the Wilks Formula Calculator for single lifts?
- Yes, you can input the weight of a single lift (like just your squat) to get a Wilks score for that specific lift, though it’s most commonly used for the 3-lift total.
- Does the Wilks formula account for age?
- The standard Wilks formula does not directly include age. However, there are age-adjusted formulas (like the McCulloch or Foster formulas for masters lifters) that can be applied to the Wilks score.
- Why are the coefficients different for men and women?
- The coefficients are based on statistical analysis of lifting performances and reflect physiological differences between men and women, leading to different strength-to-bodyweight ratios on average.
- How accurate is the Wilks Formula Calculator?
- Our calculator is accurate based on the standard Wilks formula and coefficients. The formula itself is a model and, like all models, has limitations but is widely accepted in powerlifting.
- Is a higher body weight always better for a higher Wilks score?
- Not necessarily. While heavier lifters lift more absolute weight, the Wilks coefficient decreases as body weight increases, balancing it out. The goal is to maximize strength relative to body weight.
- Where can I find more powerlifting resources?
- You can explore our section on powerlifting resources for more information and tools.
Related Tools and Internal Resources
- One-Rep Max Calculator: Estimate your 1RM based on reps performed at a lower weight.
- Body Fat Calculator: Estimate your body fat percentage, which can relate to strength potential.
- Powerlifting Resources: A collection of articles and tools for powerlifters.
- Training Programs: Find strength training programs to help increase your lifts and Wilks score.
- Strength Standards: See how your lifts compare to different strength levels.
- Meet Preparation Guide: Tips for preparing for a powerlifting competition.