Win Probability Calculator

Win Probability Calculator

Understanding the true probability behind the odds is one of the biggest edges a bettor can gain. Bookmakers frame prices to protect their margin, meaning the headline odds seldom reflect the real chance of a selection winning. By converting odds into implied win percentages—and vice versa—this tool allows you to instantly identify whether a price offers genuine value or is simply market noise. When you can see the “fair odds” versus the odds being offered, you gain the ability to spot overpriced and underpriced selections, refine your staking approach, and avoid emotionally-driven bets. This is the foundation of professional betting: evaluating risk in numerical terms, not instinct. With this tool, every bet becomes a calculated decision rather than a guess, helping you build a consistent, long-term value-based strategy.

Odds ⇄ Win Probability Value Tool

1. Convert odds to implied win %

Implied win chance:

2. Convert win % to fair odds

Fair decimal odds:
Fair fractional odds:
Fair American odds: