Estimate a single-match USATT table tennis rating change from the two pre-match ratings and the match result.
Table Tennis Rating Formula or Method
The current USATT points-exchange chart assigns a discrete point gain or loss from the absolute rating difference and whether the higher- or lower-rated player won.
How the Calculation Works
The calculator applies the displayed relationship or published lookup directly to the visible required inputs and reports one defined result with supporting details.
How to Use This Calculator
- Keep the listed result selected in the Solve for menu.
- Enter or select every visible required input.
- Select Calculate and review the primary result, supporting values, and steps.
- Use Reset before starting a new sample.
Worked Example
A 1500 player beating a 1550 opponent is a 50-point upset and gains 13 points, producing an estimated rating of 1513.
Input and Result Guide
| Item | How to use it |
|---|---|
| Player rating | Enter the pre-event rating for the player being estimated. |
| Opponent rating | Use the opponent’s rating from the same system and processing date. |
| Result | Choose win or loss from the player’s perspective. |
Interpreting the Result
Keep the sport, record scope, equipment setup, units, and source definitions consistent when comparing results.
Assumptions and Limitations
Official USATT event processing can include multiple passes and adjustments for unrated or underrated players. Treat this as a single-match estimate, not an official post-event rating.
Common Questions
Why is there only one Solve for option?
This tool has one defined output. The selector keeps the page consistent with Calculator Academy’s standard calculator layout.
Will my last successful calculation be restored?
Yes. The calculator saves enabled source values and the successful result in this browser. Reset clears that saved state.
Sources
USATT Ratings System Explained, updated August 7, 2025, and the ratings changes effective December 22, 2025.