Decimal, fractional and American odds explained
The same odds can be written in three formats, and each one can be turned into an implied probability.
Fractional odds UK / Ireland
Show profit relative to stake. 5/2 means £5 profit for every £2 staked, plus your £2 back. Total return on a £2 bet: £7.
7/4 on a £10 bet returns £17.50 in total
Decimal odds Europe / Australia
Show total return per unit staked, stake included. Multiply decimal odds by your stake to find total return. Simpler to compare than fractions.
2.75 x £10 stake = £27.50 total return
American / moneyline United States
Positive odds show profit on a $100 bet. Negative odds show how much you must bet to profit $100. +200 and -200 are not mirror images.
+175 wins £175 on a £100 bet. -200 requires £200 to win £100
Implied probability All formats
Converts odds to a percentage probability. Useful for identifying value: if you think a team has a 40% probability but odds imply 30%, there may be value in the bet.
Decimal 3.33 = (1 ÷ 3.33) x 100 = 30%
Why odds formats matter for football bettors
Bookmakers show odds in the format of their home market: fractional in the UK and Ireland, decimal in most of Europe and Australia, American in the US and Canada. Most betting sites let you switch, but tipsters, odds comparison sites and posts on social media often don't.
To find the best odds for a match, you need every bookmaker's odds in one format. Decimal odds are the easiest to compare: higher is better. The implied probability tells you what the odds say about the match, so you can check it against your own view.
How to use the odds converter
- 1
Type the odds in the format you have. 7/4, evens, 2.75, +175 or a probability like 36.4 all work.
- 2
Read the other formats. The other three fields update as you type.
- 3
Enter a stake. The converter shows the returns and the profit if the bet wins.
- 4
Copy what you need. Every format has a copy button, and Copy link saves the odds in the link.
How to convert betting odds
Every conversion goes through decimal odds. Turn the odds you have into decimal first, then into the format you want.
Fractional to Decimal = (Numerator ÷ Denominator) + 1
Decimal to Fractional = Decimal - 1, then simplify
Decimal to American (+) = (Decimal - 1) x 100
Decimal to American (-) = -100 ÷ (Decimal - 1)
American (+) to Decimal = (American ÷ 100) + 1
American (-) to Decimal = (100 ÷ |American|) + 1
Decimal to Implied % = (1 ÷ Decimal) x 100
Implied % to Decimal = 100 ÷ Probability %
| Conversion | Example |
|---|---|
| Fractional to Decimal | 7/4: (7 ÷ 4) + 1 = 2.75 |
| Decimal to Fractional | 2.75 - 1 = 1.75 = 7/4 |
| Decimal to American (+) | 2.75: (2.75 - 1) x 100 = +175 |
| Decimal to American (-) | 1.5: -100 ÷ 0.5 = -200 |
| American (+) to Decimal | +200: (200 ÷ 100) + 1 = 3.0 |
| American (-) to Decimal | -150: (100 ÷ 150) + 1 = 1.67 |
| Decimal to Implied % | 4.0: (1 ÷ 4) x 100 = 25% |
| Implied % to Decimal | 25%: 100 ÷ 25 = 4.0 |
Odds conversion table
The most common odds in every format. Choose a row to load it into the converter.
| Fractional | Decimal | American | Implied |
|---|---|---|---|
| 1/100 | 1.01 | -10000 | 99.0% |
| 1/5 | 1.20 | -500 | 83.3% |
| 1/4 | 1.25 | -400 | 80.0% |
| 1/3 | 1.33 | -300 | 75.0% |
| 2/5 | 1.40 | -250 | 71.4% |
| 1/2 | 1.50 | -200 | 66.7% |
| 4/7 | 1.57 | -175 | 63.6% |
| 4/6 | 1.67 | -150 | 60.0% |
| 4/5 | 1.80 | -125 | 55.6% |
| 10/11 | 1.91 | -110 | 52.4% |
| Evens | 2.00 | +100 | 50.0% |
| 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 | +137 | 42.1% |
| 6/4 | 2.50 | +150 | 40.0% |
| 13/8 | 2.63 | +163 | 38.1% |
| 7/4 | 2.75 | +175 | 36.4% |
| 15/8 | 2.88 | +188 | 34.8% |
| 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 | 25.0% |
| 7/2 | 4.50 | +350 | 22.2% |
| 4/1 | 5.00 | +400 | 20.0% |
| 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% |
| 9/1 | 10.00 | +900 | 10.0% |
| 10/1 | 11.00 | +1000 | 9.1% |
| 14/1 | 15.00 | +1400 | 6.7% |
| 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 | 2.0% |
| 100/1 | 101.00 | +10000 | 1.0% |
Fractional odds show profit relative to stake. Decimal odds include the stake in the return. American odds are relative to a 100 unit stake.
Examples
Load any example into the converter to change the odds or the stake.
Fractional to decimal: 7/4
A UK bookmaker offers 7/4 on a home win. In decimal that is 2.75, so a 10 stake returns 27.50.
| Fractional | Decimal | American | Implied | Returns on 10 |
|---|---|---|---|---|
| 7/4 | 2.75 | +175 | 36.4% | 27.50 |
American to decimal: -150
A US site shows -150 on the favorite. You need to stake 150 to win 100, which is 1.67 in decimal and 4/6 as a fraction.
| Fractional | Decimal | American | Implied | Returns on 10 |
|---|---|---|---|---|
| 4/6 | 1.67 | -150 | 60.0% | 16.67 |
Decimal to implied probability: 1.91
Over 2.5 goals and under 2.5 goals are both 1.91. Each side implies 52.4%, so the two add up to 104.7%. The 4.7% above 100% is the bookmaker's margin.
| Fractional | Decimal | American | Implied | Returns on 10 |
|---|---|---|---|---|
| 10/11 | 1.91 | -110 | 52.4% | 19.10 |
Common mistakes when converting odds
- Reading 2/1 as 2.00. 2/1 is 3.00 in decimal. Fractional odds show the profit, decimal odds include your stake.
- Dropping the minus sign. -150 and +150 are very different odds: 1.67 against 2.50.
- Taking implied probability as the real probability. Bookmakers build a margin into their odds, so the implied probabilities in one market add up to more than 100%. How to devig odds
- Comparing rounded odds. 10/11 is 1.909 in decimal, which bookmakers show as 1.91. Small gaps like this add up over many bets.