Understanding how to convert between decimal and fractional odds is crucial for betting. Most UK bookmakers allow you to switch between the two, and using decimal odds is recommended for matched betting due to their simplicity and clarity. Here, we'll explain the differences, how to convert odds manually, and provide a quick reference table for common odds conversions.
Fractional odds (e.g., 5/1, 2/5) are the traditional format used by UK bookmakers. The first number represents potential profit per unit stake, while the second is the stake itself.
For example: 5/1 means a £1 bet returns £5 profit plus your £1 stake.
Decimal odds (e.g., 6.00, 1.40) include both the stake and profit in one figure.
For example: 6.00 means a £1 bet returns £6 total (£5 profit + £1 stake).
| Fractional | Decimal |
|---|---|
| 1/5 | 1.20 |
| 2/5 | 1.40 |
| 1/1 (evens) | 2.00 |
| 5/2 | 3.50 |
| 10/1 | 11.00 |
Divide the fraction and add 1.
Example: (5 ÷ 1) + 1 = 6.00
Subtract 1 and convert to a fraction.
Example: 3.50 - 1 = 2.50 → 5/2
To make things easier, we have an Odds Converter Tool, which allows you to switch between decimal and fractional odds instantly.
Decimal odds simplify calculations and are the standard format on betting exchanges.
Yes, most UK bookmakers allow you to toggle between decimal and fractional odds in your account settings.
While UK bookies traditionally use fractional odds, international sites and exchanges prefer decimal.