DWZ

Deutsche Wertungszahl — the German chess rating system.

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

K-Factor

Player Name

Player Rating

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 preliminary calculation for DWZ changes. The official DWZ system may take into account age, game history, development coefficient, and other evaluation parameters. As a result, the value shown in this tool may differ from the official DWZ record.

For Players Without DWZ

For players without a DWZ value, the tool can show a starting performance based on results against rated opponents. The official first DWZ value is determined according to the German Chess Federation's applicable calculation and publication conditions.

How DWZ Works

Expected Score:

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

New Rating:

R'a = Ra + K × (S - E)

Simplified development coefficients used in this tool: E=30 for new players, E=15 for experienced players rated 2400 and above. The official DWZ system calculates dynamic coefficients based on game history and age.

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.