Chess Elo Calculator icon

Chess Elo Calculator

by Chessdom · calendar.chessdom.com · Games
Manifest V3 Free
View in Chrome Web Store Data as of 12 Nov 2026

Calculate FIDE rating performance, rating changes, and expected scores

Users
9
0 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#202K
#179K among extensions
Version
1.2
updated 3 Aug 2025

Users

monthly, 16 months
049Aug 2025Apr 2026Nov 2026
Latest, 12 Nov 2026: 9 usersMove the mouse over the chart for any month

Ratings count

monthly, 16 months
001Aug 2025Apr 2026Nov 2026
Latest, 12 Nov 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Chess Elo Calculator

Calculate your rating performance, rating changes and expected score from FIDE rated chess tournaments

Growth

WindowUsersChangeRatingsRating
7 days+1+12.5%00.00
30 days0+0.0%00.00
6 months+2+28.6%00.00
1 year+3+50.0%00.00

Version history

2 versions recorded
1.23 Aug 2025
1.12 Aug 2025

Details

Category
Games
First seen
2 Aug 2025
Size
48 KB
Languages
en
Pricing
Free
Privacy policy
calendar.chessdom.com
Extension ID
akkooejamnkieceflcepfkfokcnjebde

Permissions and risk

Minimal riskimpact 0, likelihood 2

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