USCF Rating Calculator
Estimate your US Chess rating after a tournament. Enter your current rating and your opponents’ ratings and results.
Player setup
Enter your current rating, the number of games you have played, and the tournament time control.
Event games
Enter only games played, not byes or unplayed forfeits. Use the same opponent label when you play someone again.
Rating floors
Enter a known floor, or open advanced controls to estimate the OTB floor from rating history.
Advanced controls include the OTB absolute floor, peak established floor, cash-prize floor, and Original Life Master floor.
Your official rating may differ. US Chess recalculates ratings for everyone in the event together; this estimate uses the opponent ratings you enter. See the US Chess rating-system spec and the US Chess rulebook.
Standard formula
For players with more than eight prior games and a mix of results. Players with 9–25 games use this formula too, even though their ratings are still provisional.
Special formula
For players with eight or fewer prior games, or whose prior games were all wins or all losses. The result is capped at 2700.
Floors and conversions
The page includes OTB personal floors, peak established floors, Original Life Master floors, age-based starts, and FIDE/CFC conversions.
How this calculator maps to the US Chess spec
Initialize unrated players from other ratings or age.
Compute effective games N0 from rating and prior games.
Use provisional estimates for unrated opponents when needed.
Calculate intermediate ratings with special or standard formulas.
Repeat using intermediate opponent estimates for final ratings.
To mirror an official event exactly, enter the opponent rating from the rating pass you want to inspect. For most quick estimates with already-rated opponents, pre-event opponent ratings are a useful approximation.
USCF rating calculator FAQ
Is this an official US Chess rating result?
No. US Chess rates the full event in passes, and opponent estimates can change during that process. This calculator implements the published formulas for a single player using the opponent ratings you enter, so it is best for planning, education, and checking the mechanics.
Why can a provisional result use the special formula even with many games?
The US Chess specification says the special formula applies when a rating is based on eight or fewer games, and also when all prior rated games were wins or all prior rated games were losses.
Which rating rules does this calculator use?
This page follows the April 6, 2026 specification, including the bonus multiplier of 10 introduced in 2025. It estimates ordinary tournament results, not individual matches or foreign FIDE rating adjustments.
Planning a rated event?
Pair this calculator with Chess67 tools for registration, event pages, and tournament operations.