Sports All tools

Implied Probability Calculator

Turn odds into win probability and reverse probability into fair odds.

Result

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Worked result from default inputs (server-side math).

Decimal odds	Implied probability	Fair decimal check
1.91	52.36%	1.910

Educational maths only. Not betting advice. Confirm live odds and terms with the operator. 18+.

Does implied probability include vig?

Yes—the raw conversion from a single price includes the book’s margin. Use the vig tool for two-way no-vig estimates.

Convert American, decimal, and fractional odds with implied probability.

Check if a sports bet is +EV using your win probability and the odds.

Size a stake from edge, odds, and bankroll (full and fractional Kelly).