RIS - Relative Index for Streetlifting | 2025 Edition Official Calculator

Relative Index for Streetlifting - 2025 Edition

Created by Waris Radji & Mathieu Ardoin.

The Relative Index for Streetlifting (RIS) provides the definitive method for comparing Streetlifting athletes across weight classes within the same gender. Developed specifically for All-4 competitions, this scoring system normalizes strength performance using comprehensive data from elite competitors. Updated annually to reflect evolving standards, RIS offers a fair benchmark for athletes, coaches, and competition organizers worldwide.

Total (kg)

Body Weight (kg)

Gender

♂ Men ♀ Women

Your RIS Score

0.00

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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.

Constants (2025)	Men	Women

The formula is:

\[ \text{RIS} = \text{Total} \times \frac{100}{A + \frac{K - A}{1 + Q \cdot e^{-B \cdot (\text{BW} - v)}}} \]

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:

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.