Decimal odds are common across Europe, Canada, Australia and betting exchanges. They show the total return multiplier, including the original stake. Fractional odds are common in UK racing and traditional bookmaker displays. They show profit relative to stake.
This Decimal to Fractional Odds Converter turns a decimal price into a UK-style fraction. It also shows the American equivalent, break-even probability, profit and total return for your stake.
Quick examples: 1.50 converts to 1/2, 1.91 converts to about 10/11, 2.00 converts to evens, 2.50 converts to 3/2, and 3.00 converts to 2/1.
Decimal to Fractional Odds Converter
Convert decimal odds into UK fractions, moneyline odds, probability, profit and return.
How to Use the Converter
- Enter decimal odds: type a price such as 1.50, 1.91, 2.50 or 3.00.
- Add your stake: the calculator shows profit and total return for that stake.
- Read the UK fraction: this is the profit ratio shown in traditional fractional format.
- Check the extras: the tool also shows American odds and break-even probability.
Decimal to Fractional Formula
Decimal prices include the returned stake. Fractions show only the profit part. That is why the first step is always to subtract 1.
Fractional Odds = Decimal Odds – 1
Then express the profit number as a fraction and simplify it.
| Decimal price | Profit part | Fractional result | Meaning |
|---|---|---|---|
| 1.50 | 0.50 | 1/2 | 1 unit profit for every 2 units staked |
| 2.00 | 1.00 | 1/1 or evens | Profit equals stake |
| 2.50 | 1.50 | 3/2 | 3 units profit for every 2 units staked |
| 3.00 | 2.00 | 2/1 | 2 units profit for every 1 unit staked |
Worked Example: Convert 2.50 to a Fraction
Decimal odds of 2.50 mean a winning 1-unit bet returns 2.50 units total. The profit part is:
2.50 – 1 = 1.50
Convert 1.50 into a fraction:
1.50 = 150/100 = 3/2
So decimal 2.50 is 3/2 in simplified fractional form.
Worked Example: Convert 1.91 to a Fraction
Decimal odds of 1.91 are commonly used as an international equivalent of the US -110 spread or total price.
The profit part is:
1.91 – 1 = 0.91
The exact mathematical fraction is close to 91/100. Traditional UK bookmaker boards usually approximate this as 10/11, which equals about 1.91 decimal.
Exact Mathematical Fraction vs Standard Bookmaker Fraction
Some decimal prices convert cleanly into familiar UK fractions. Others produce awkward mathematical fractions that are not normally used by bookmakers.
| Decimal price | Exact fraction | Common bookmaker display | Note |
|---|---|---|---|
| 1.50 | 1/2 | 1/2 | Exact match |
| 1.91 | 91/100 | 10/11 | Common approximation |
| 2.38 | 69/50 | 11/8 | Close standard ladder price |
| 2.50 | 3/2 | 6/4 or 3/2 | Equivalent fractions |
The calculator shows a simplified mathematical fraction and, where useful, a nearby standard bookmaker fraction. This matters because close-looking prices can still have different payouts and different break-even probabilities.
Common Conversion Table
| Decimal odds | Fractional odds | American odds | Break-even probability |
|---|---|---|---|
| 1.20 | 1/5 | -500 | 83.33% |
| 1.50 | 1/2 | -200 | 66.67% |
| 1.67 | 2/3 | -150 | 60.00% |
| 1.91 | 10/11 | -110 | 52.38% |
| 2.00 | Evens / 1/1 | +100 | 50.00% |
| 2.50 | 3/2 | +150 | 40.00% |
| 3.00 | 2/1 | +200 | 33.33% |
| 4.00 | 3/1 | +300 | 25.00% |
| 5.00 | 4/1 | +400 | 20.00% |
| 11.00 | 10/1 | +1000 | 9.09% |
When This Converter Is Useful
- UK racing: racecards and traditional bookmaker boards often use fractions.
- Exchange comparison: exchanges usually use decimal odds, while UK racing media may quote fractional prices.
- Payout checks: fractions make it easy to see profit relative to stake.
- Line shopping: converting formats helps compare prices across different sportsbooks.
Common Mistakes
Forgetting to subtract 1
Decimal odds include the returned stake. Fractional odds show profit only. Decimal 2.00 is not 2/1; it is 1/1 or evens.
Confusing exact and standard fractions
Some decimal prices produce exact fractions that are not common on UK boards. A close standard fraction may be shown by a bookmaker, but it can represent a slightly different price.
Assuming the format changes value
The format does not change the underlying payout. Decimal 3.00 and fractional 2/1 represent the same price.
Important Limitation
This converter only changes the odds display format. It does not tell you whether a bet has value. To judge value, compare the break-even probability from the price with your own estimate of the outcome’s real chance.
Frequently Asked Questions
How do I convert decimal odds to fractional odds manually?
Subtract 1 from the decimal odds to isolate the profit part. Then express that number as a fraction and simplify it. For example, 3.50 – 1 = 2.50, which becomes 5/2.
What is 1.50 in fractional odds?
Decimal odds of 1.50 convert to 1/2. This means 1 unit of profit for every 2 units staked.
What is 2.00 in fractional odds?
Decimal odds of 2.00 are evens, also written as 1/1. A winning bet profits the same amount as the stake.
What is 2.50 in fractional odds?
Decimal odds of 2.50 convert to 3/2 in simplified fractional form. Some UK displays may show the equivalent fraction 6/4.
Why does my bookmaker show a different fraction?
Bookmakers often use a standard odds ladder. Some decimal prices convert to exact mathematical fractions that are not common on that ladder, so the displayed price may be a nearby standard fraction instead.
Are decimal and fractional odds different prices?
No, not when they are exact equivalents. They are different formats for the same underlying price. However, rounded or nearby standard fractions can represent slightly different prices.