Relative Index for Streetlifting - 2025 Edition
Created by Waris Radji & Mathieu Ardoin.
The Relative Index for Streetlifting (RIS) is a scoring system that makes fair comparisons possible between athletes of different weights within the same gender. The RIS is created using real competition data from top performers worldwide and shows how strong athletes are relative to their body weight. Each year, the system is updated with new competition results to stay current with how the sport is developing. The score directly shows how an athlete's performance measures up against the very best lifters at the same body weight. This gives athletes, coaches, and fans a reliable way to compare performances, establish records, and determine rankings across weight categories in streetlifting competitions, though it should be noted that current data limitations prevent accurate cross-gender comparisons.
A data-driven approach
The RIS scoring system is built on comprehensive data analysis of elite competition results. Data was collected from the All Things: Streetlifting database, specifically examining the top 10 performers in each weight class who competed before 2025 in the All-4 competition format. Both bodyweight and total performance figures were analyzed using robust regression analysis—a statistical technique that identifies the relationship between these variables by finding the curve that best fits the data points, while taking in account outliers. In simple terms, this process revealed how lifting performance typically scales with bodyweight among top athletes, creating a function that expresses expected total performance based on bodyweight. This function was then normalized to create the RIS Score. A research paper that describe the scientific methodology will be released soon.
This visualization shows the relationship between body weight (x-axis) and total performance score (y-axis) for athletes across different weight classes. The size of each point represents the total score, with larger points indicating higher scores. Hover over points to see detailed athlete information.
Integration
The RIS formula is available for free integration into any platform or application. You are welcome to use this scoring system without prior request for competitions, websites, apps, or analysis tools. We simply ask that you credit the creators of the RIS system in your implementation.
| Constant | Men | Women |
|---|
The formula is:
where BW is body weight in kg, Total is the athlete's total lifted weight in kg, and A, K, B, v, Q are the gender-specific constants defined above.
Microsoft Excel
Copy these formulas directly into Excel to calculate RIS scores. The formula references cells A2 for body weight and B2 for total weight, but you can adjust these cell references as needed.
For Men:
For Women:
Assuming A2 = Body Weight in kg, B2 = Total in kg
Google Sheets
For a more convenient implementation in Google Sheets, you can create custom functions that calculate RIS scores with a single function call:
- Open your Google Sheet
- Go to Extensions → Apps Script
- Paste the following code (constants are automatically filled from the current RIS.js file):
After saving the script, you can use the functions directly in your sheet:
=RIS_MEN(A2, B2)- where A2 is body weight and B2 is total weight for male athletes=RIS_WOMEN(A2, B2)- where A2 is body weight and B2 is total weight for female athletes
Frequently Asked Questions
Special Thanks
We extend our gratitude to the organizations that have made this research and calculator possible through their support and collaboration.
