Elo Calculator

Generic single-game logistic Elo update with a shared supplied K. Expected score is not win probability. Does not implement official FIDE/US Chess initial ratings,bonuses,expectancy tables or rating caps.

Your workbenchInputs are not stored

Result

Enter your values and run the tool to see your result.

How to use this tool

Check the units, enter your values, and run the tool. Results follow the assumptions and method below.

Calculation method

A expected score1/(1+10^((ratingB-ratingA)/400))

A updated ratingratingA+k*(score-1/(1+10^((ratingB-ratingA)/400)))

B updated ratingratingB-k*(score-1/(1+10^((ratingB-ratingA)/400)))

References

https://www.usapetanque.org/uploads/3/4/9/7/34979601/ratingsystem_by_albyn_jones.pdf