Is the Odds Converter free to use?

Yes, the Odds Converter is completely free. There is no sign-up, no account required, and no limit on how often you can use it.

How accurate is the Odds Converter?

The Odds Converter uses standard mathematical formulas and produces results accurate to standard precision. For critical applications, always verify with an authoritative source.

What devices does the Odds Converter work on?

The Odds Converter works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.

🔢 Number Tools

Betting Odds Converter

Convert between fractional, decimal, American (moneyline) and implied probability betting odds. Free.

The Odds Converter is a free online tool that helps you convert between fractional, decimal, american (moneyline) and implied probability betting odds. free It runs in your browser with no sign-up, downloads, or installation needed. All processing happens locally — your data stays on your device.

Odds format

Odds value

Stake (£)

How to use the Odds Converter

Three odds formats

Decimal (Europe/Australia): 2.5 means you get £2.50 back for every £1 staked, including your stake. Fractional (UK): 3/2 means you win £3 profit for every £2 staked. American (US): +150 means £100 stake wins £150 profit; -200 means you must stake £200 to win £100.

Implied probability

Every odds format implies a probability. Decimal odds of 2.0 imply a 50% probability. Bookmakers add a margin (the "overround"), so the implied probabilities of all outcomes typically sum to more than 100%. The difference is the bookmaker's edge.

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