Odds Converter
Type a price in any format and the rest update instantly, along with the probability the odds imply.
Common odds reference table
Every standard UK price with its decimal, American and implied probability equivalents.
| Fractional | Decimal | American | Implied probability |
|---|---|---|---|
| 1/10 | 1.10 | -1000 | 90.9% |
| 1/5 | 1.20 | -500 | 83.3% |
| 1/4 | 1.25 | -400 | 80.0% |
| 1/3 | 1.33 | -300 | 75.0% |
| 2/5 | 1.40 | -250 | 71.4% |
| 1/2 | 1.50 | -200 | 66.7% |
| 8/13 | 1.62 | -163 | 61.9% |
| 4/6 | 1.67 | -150 | 60.0% |
| 4/5 | 1.80 | -125 | 55.6% |
| 10/11 | 1.91 | -110 | 52.4% |
| 1/1 (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 | +138 | 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% |
| 3/1 | 4.00 | +300 | 25.0% |
| 4/1 | 5.00 | +400 | 20.0% |
| 5/1 | 6.00 | +500 | 16.7% |
| 10/1 | 11.00 | +1000 | 9.1% |
| 20/1 | 21.00 | +2000 | 4.8% |
| 50/1 | 51.00 | +5000 | 2.0% |
How the three odds formats work
Fractional odds are the traditional UK format. The first number is the profit, the second is the stake: at 6/4 you win £6 profit for every £4 staked. They are standard with British bookmakers and in horse racing.
Decimal odds show the total return per £1 staked, stake included. At 2.50, a £1 bet returns £2.50 in total (£1.50 profit). They are the norm in Europe, Australia and on betting exchanges, and the easiest format for comparing prices.
American odds (moneyline) centre on $100. Positive numbers (+150) show profit on a $100 stake; negative numbers (-150) show the stake needed to win $100. Standard across US sportsbooks.
Frequently asked questions
How do I convert fractional odds to decimal odds?+
Divide the first number by the second, then add 1. For example, 6/4 is 6 divided by 4 (1.5) plus 1, which gives decimal odds of 2.50. Both formats describe the same price: a winning £4 stake at 6/4 returns £10 in total, exactly as £4 at 2.50 does.
What is implied probability in betting?+
Implied probability is the chance of winning that a set of odds suggests. It is calculated as 1 divided by the decimal odds. Decimal odds of 2.50 imply a probability of 40%, because 1 ÷ 2.50 = 0.40. If you believe the true chance is higher than the implied probability, the price may represent value.
What is the difference between +150 and -150 in American odds?+
Positive American odds show the profit on a $100 stake: +150 means a $100 bet returns $150 profit (decimal 2.50). Negative odds show the stake needed to win $100: -150 means you must bet $150 to win $100 profit (decimal 1.67). Positive numbers indicate underdogs, negative numbers indicate favourites.
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