Odds to Probability Text Changer

Name: Odds to Probability Text Changer
Rating: 5 (1 reviews)
Author: dannyhines5

Click this extension to convert all American odds on a webpage to implied probability.

As of June 2026, Odds to Probability Text Changer has 123 users and a 5.00/5 rating from 1 reviews in the Entertainment category.

dannyhines5 Entertainment★ Featured

Chrome Web Store ↗.crx

Users+0.8%

123

Rating0%

5.00

1 reviews

Reviews0%

Version

3.3

Manifest V3

History

3 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	122	5.00	1	3.3
May 2, 2026	129	5.00	1	3.3
Jun 1, 2026	127	5.00	1	3.3
Now	123	5.00	1	3.3

Permissions & access

Permissions: storage
Host access: None declared

Screenshots

Odds to Probability Text Changer screenshot 1

About

This extension looks for American odds (such as "+140" or "-350") on the page, calculates the implied probability, and displays it as a percentage. For example, "+140" becomes "+140 (41.7%)"

Assuming the odds are "fair", the implied probability is the percentage chance that the bet is supposed to win. 

Because sportsbooks charge a fee or "vig" for placing bets, this number will appear slightly higher than the actual probability. 

This implied probability is simpler way to look at sports betting: a "good bet" is one where you believe the percentage chance is higher than the implied probability.

This project is open-source and available on Github: https://github.com/danielchines/odds-converter-extension