Prediction Market to Sports Odds Converter

Append sportsbook-style odds next to prediction market prices (Decimal, American, Fractional) with optional fee adjustment.

As of June 2026, Prediction Market to Sports Odds Converter has 109 users in the Productivity category.

Usersup 147.7 percent+147.7%
109
109
Ratingno change0%
— reviews
Reviewsno change0%
Version
1.2.0
Manifest V3

History

5 snapshots

Tracking since Apr 1, 2026.

114.276.538.8Apr 1, 2026Jun 6, 2026
View as table
DateUsersRatingReviewsVersion
Apr 1, 2026441.2.0
Apr 18, 2026451.2.0
May 3, 2026511.2.0
May 12, 2026621.2.0
Jun 6, 20261021.2.0
Now1091.2.0

Permissions & access

Permissions
None declared
Host access
https://*.polymarket.com/*, https://*.kalshi.com/*, https://kalshi.com/*, https://polymarket.com/*

Screenshots

Prediction Market to Sports Odds Converter screenshot 1Prediction Market to Sports Odds Converter screenshot 2

About

Chrome extension that appends sportsbook-style odds next to prediction market prices on Polymarket and Kalshi. Shows Decimal, American, and Fractional. Optional fee adjustment (in percentage points) to model effective probability before conversion.

- Finds text like `55%` or `$0.55` and computes:
  - Decimal: 1 / p
  - American: if p >= 0.5 → -(p/(1-p))*100, else ((1-p)/p)*100
  - Fractional: (1 - p) / p as a simplified fraction (approx.)
- Works on SPA updates using a `MutationObserver`.
- Avoids duplicate badges via a data-attribute.

Technical

Version
1.2.0
Manifest
V3
Size
13.15KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
clpgallnkfmpjoaodbbpjfjfknghojoa
Developer ID
u3643d51fdc944e263ecf1b4941c0061c
Developer Email
[email protected]
Created
Sep 10, 2025
Last Updated (Store)
Oct 6, 2025
Last Scraped
Jun 6, 2026
Website

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Data sourced from the Chrome Web Store · last verified Jun 6, 2026.