Betting Odds Converter
Convert between decimal, fractional and American odds, and see the implied probability behind any price. Type into any one field, and the others update instantly.
Written by Ziv Mor · Last updated: 2 November 2026
This is the bookmaker's implied chance of the outcome happening, not a prediction. It includes the bookmaker's margin, so it's always a little higher than the "true" probability.
How the Conversions Work
| Format | Common where | Formula to decimal |
|---|---|---|
| Decimal (European) | Most South African bookmakers | Used directly — stake × decimal odds = total payout |
| Fractional (UK) | Some racing and older UK-style markets | decimal = (numerator ÷ denominator) + 1 |
| American (Moneyline) | US sportsbooks, sometimes shown on international platforms | positive: decimal = (odds ÷ 100) + 1 · negative: decimal = (100 ÷ |odds|) + 1 |
South African bookmakers mostly quote decimal odds, so if you're used to reading “3/2” or “+150” from overseas content, this tool is the fastest way to see what that actually means in the format you'll see on your app.
What “Implied Probability” Actually Means
Every price a bookmaker offers bakes in their margin (sometimes called the “overround” or “vig”). Implied probability is simply 1 ÷ decimal odds, expressed as a percentage. It tells you what chance the bookmaker's price implies, not what the real-world chance is. Comparing implied probability across two or three bookmakers on the same market is a quick way to spot which one is offering better value on a specific bet.
FAQ
What odds format do South African bookmakers use?
Decimal odds are the norm. Some sites let you switch format: EasyBet’s header, for example, shows an odds-format selector set to Decimal (seen on 2 November 2026). Check the settings on your own bookmaker’s site or app.
Do higher decimal odds always mean better value?
Not necessarily. Higher odds mean a lower implied probability of that outcome, which usually means the bookmaker (and the market generally) rates it less likely. "Value" comes from comparing a price against your own honest assessment of the real chance, not from the size of the number alone.
Why do odds change before an event starts?
Odds move with betting volume, team news, and other market information. This is normal and isn't something an app or predictor can reliably anticipate in advance.