Free odds converter
Different bookmakers and countries quote odds in different formats. This converter switches instantly between decimal (2.50), fractional (3/2) and American (+150) odds, and shows the implied probability so you can compare prices and spot value.
The three odds formats
- Decimal (European): the total return per £1 staked, including your stake — 2.50 returns £2.50 for every £1.
- Fractional (UK): profit relative to stake — 3/2 means £3 profit per £2 staked.
- American (US): +150 means £150 profit on a £100 stake; −200 means you stake £200 to win £100.
Odds and implied probability
Implied probability is the chance the odds suggest, calculated as 100 ÷ decimal odds. Decimal 2.50 implies a 40% chance. Comparing implied probability with your own estimate is the core of finding value — see our value betting guide.
Work out returns with the bet calculator, or combine selections with the accumulator calculator.
Fractional to decimal odds conversion table
The most common UK fractional prices with their decimal, American and implied-probability equivalents. Decimal odds are 1 + (numerator ÷ denominator); implied probability is 100 ÷ decimal odds. For any price not listed, type it into the converter above.
| Fractional | Decimal | American | Implied probability |
|---|---|---|---|
| 1/10 | 1.10 | -1000 | 90.9% |
| 1/5 | 1.20 | -500 | 83.3% |
| 1/4 | 1.25 | -400 | 80% |
| 1/3 | 1.33 | -300 | 75% |
| 2/5 | 1.40 | -250 | 71.4% |
| 1/2 | 1.50 | -200 | 66.7% |
| 4/7 | 1.57 | -175 | 63.6% |
| 8/13 | 1.62 | -162 | 61.9% |
| 4/6 | 1.67 | -150 | 60% |
| 4/5 | 1.80 | -125 | 55.6% |
| 5/6 | 1.83 | -120 | 54.5% |
| Evens (1/1) | 2.00 | +100 | 50% |
| 11/10 | 2.10 | +110 | 47.6% |
| 6/5 | 2.20 | +120 | 45.5% |
| 5/4 | 2.25 | +125 | 44.4% |
| 11/8 | 2.38 | +138 | 42.1% |
| 6/4 | 2.50 | +150 | 40% |
| 7/4 | 2.75 | +175 | 36.4% |
| 2/1 | 3.00 | +200 | 33.3% |
| 9/4 | 3.25 | +225 | 30.8% |
| 5/2 | 3.50 | +250 | 28.6% |
| 11/4 | 3.75 | +275 | 26.7% |
| 3/1 | 4.00 | +300 | 25% |
| 7/2 | 4.50 | +350 | 22.2% |
| 4/1 | 5.00 | +400 | 20% |
| 9/2 | 5.50 | +450 | 18.2% |
| 5/1 | 6.00 | +500 | 16.7% |
| 6/1 | 7.00 | +600 | 14.3% |
| 7/1 | 8.00 | +700 | 12.5% |
| 8/1 | 9.00 | +800 | 11.1% |
| 10/1 | 11.00 | +1000 | 9.1% |
| 12/1 | 13.00 | +1200 | 7.7% |
| 16/1 | 17.00 | +1600 | 5.9% |
| 20/1 | 21.00 | +2000 | 4.8% |
| 25/1 | 26.00 | +2500 | 3.8% |
| 33/1 | 34.00 | +3300 | 2.9% |
| 50/1 | 51.00 | +5000 | 2% |
| 66/1 | 67.00 | +6600 | 1.5% |
| 100/1 | 101.00 | +10000 | 1% |
Odds konvertering: desimalodds, brøkodds og amerikanske odds
Norske og danske spillselskaper viser som regel desimalodds (for eksempel 2,50): tallet er hele utbetalingen per krone du satser, innsatsen inkludert. Britiske sider bruker brøkodds (3/2 betyr 3 kroner i gevinst per 2 kroner satset), og amerikanske sider bruker plus/minus-odds (+150 er gevinsten på 100 satset, −200 er innsatsen som trengs for å vinne 100).
Slik regner du om: desimalodds = 1 + teller ÷ nevner, så 3/2 blir 2,50. Implisitt sannsynlighet = 100 ÷ desimalodds, så 2,50 tilsvarer 40 %. Skriv inn oddsen i et av feltene over, så konverteres de to andre formatene og sannsynligheten automatisk — gratis, uten registrering.