Odds Converter
Convert decimal ↔ fractional ↔ American ↔ implied probability instantly. Type in any field — the others update live.
How the odds converter works
Every odds format describes the same thing: the implied probability of an outcome and the payout multiple on a winning bet. We normalise everything to decimal odds internally, then re-derive the other three formats.
Format cheat sheet
- Decimal — payout per $1 staked (incl. stake). 2.50 means $1 returns $2.50.
- Fractional — profit-to-stake ratio. 3/2 means $2 staked returns $3 profit + $2 stake.
- American — +X means $100 stake wins $X; −X means stake $X to win $100.
- Implied probability — 1 / decimal odds × 100. The break-even win rate.
FAQ
- What odds format do Australian bookmakers use?
Decimal odds are standard at every Australian bookmaker — Sportsbet, TAB, Ladbrokes, Bet365 AU, Neds and PointsBet AU all display decimal by default. Fractional is mostly a UK convention and American (moneyline) is dominant in the US.
- How do I convert decimal odds to implied probability?
Implied probability = (1 / decimal odds) × 100. So 2.50 decimal = 40% implied. This is the break-even probability — you need to win more than 40% of bets at 2.50 to be profitable.
- How do I convert decimal to American odds?
For decimal ≥ 2.00, American = (decimal − 1) × 100 (e.g. 3.00 → +200). For decimal < 2.00, American = −100 / (decimal − 1) (e.g. 1.50 → −200).
- Why does odds format matter?
It only matters for readability. The implied probability and your payout are identical across formats — 2.00, 1/1 and +100 all mean the same thing. But fluency in all three helps when reading sharp US books, UK tipsters or AU corporate sites.
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