Odds conversion, de-vigging, and Kelly staking. Every result below is computed live by the open-source betting_math_kit Python library running in a locked-down, no-egress container.
Convert between American and decimal odds, and see the implied win probability the price is charging you.
Enter both sides of a market to strip the bookmaker's margin and recover the fair, no-vig probabilities.
Given your model's win probability and the book's price, how much of your bankroll should you actually bet?
betting-math-kit is MIT-licensed, pure Python, zero deps. This demo container is read-only with no network egress. Educational only, not betting advice.
A OneTwoLoop demo