All Rating Tools
US

USCF

The official rating system of the United States Chess Federation.

Automatically import your Chess-Results.com tournament games into ELO, FIDE, UKD, USCF, DWZ and other rating calculators. Import from Chess-Results
Games imported from Chess-Results.com. Review ratings before calculating. Import from Chess-Results
Single game calculation is not available with unrated players. Switch to tournament mode and enter multiple games.
Fill in all fields completely for results to appear.

About This Calculator

This tool provides a simplified ELO-based preliminary calculation for USCF rating changes. The official USCF system may include Glicko-based calculations, bonus points, rating floors, and special evaluation rules. As a result, the value shown in this tool may differ from the official USCF record.

For Players Without USCF

For players without a USCF rating, the tool calculates an estimated initial rating using results against rated opponents throughout the tournament: R = Opponent Average + ((Wins − Losses) / Games) × 400. This calculation requires at least 4 games. The official starting rating is determined by US Chess rules on valid game count, provisional rating, bonuses, and other evaluation criteria.

How USCF Rating Works

Expected Score:

E = 1 / (1 + 10^((Rb - Ra) / 400))

New Rating:

R'a = Ra + K × (S - E)

Simplified K factors used in this tool: K=32 for players rated below 2100, K=24 for 2100–2400, and K=16 for players rated 2400 and above. The official USCF system applies different coefficients based on effective game count and special formulas.

Save & Share

Saved tournaments are stored only in this browser. Share links are saved on the server so others can view your result. My Shared Links only shows links created from this browser.