# Odds formats

> How fractional, decimal and evens odds convert: the formulas, six worked pairs with implied chance and where the setting sits in an app.

Source: https://beforeyouinstall.com/guides/odds-formats-explained/
Updated: 2026-11-07

Odds show what a winning bet returns for each unit staked. Fractional odds such as 5/1 show profit per 1 staked. Decimal odds such as 6.00 show the full return per 1, stake included. Evens is 1/1, or 2.00. To convert, add 1 to the fraction. This site writes fractional odds first and decimal in brackets.

## The conversions

- Decimal = 1 + (top number ÷ bottom number).
- Fractional = decimal − 1, written as a fraction.
- Implied chance = 1 ÷ decimal.
- Return = stake × decimal.

Back from decimal: 3.75 − 1 = 2.75, which is 11/4.

**In short:** One formula links the formats: decimal is the fraction plus 1.

## Six pairs side by side

**Six conversions. Source: our own calculation, decimals rounded to two places · checked 7 November 2026**

| Fractional | Decimal | Implied chance | Return on €10 (stake included) |
|---|---|---|---|
| 1/2 | 1.50 | 66.7% | €15.00 |
| 10/11 | 1.91 | 52.4% | €19.09 |
| 1/1 (evens) | 2.00 | 50.0% | €20.00 |
| 2/1 | 3.00 | 33.3% | €30.00 |
| 11/4 | 3.75 | 26.7% | €37.50 |
| 5/1 | 6.00 | 16.7% | €60.00 |

The percentage is a conversion of one price. It is not a forecast. The 10/11 return is €10 × 1.909 = €19.09.

**In short:** Fractional profit plus the stake gives the decimal return.

## Switching format in the app

An app may let you choose how odds are shown; we have not verified this for any operator. Where each app puts the setting: Not checked. The dated entries will come from the operators' own help pages.

The [acca calculator](https://beforeyouinstall.com/tools/accumulator-calculator/) accepts both formats: enter odds like 5/1 or 6.00.

**In short:** The setting is per app and still to be recorded.

## Related terms

- [Each-way](https://beforeyouinstall.com/guides/each-way-meaning/): place odds are a fraction of the win odds.
- [Starting price](https://beforeyouinstall.com/guides/starting-price-meaning/): the price when a race starts.
- [Reading a bet slip](https://beforeyouinstall.com/guides/read-your-bet-slip-in-a-betting-app/): where the price and return appear.

**In short:** Three terms use the same arithmetic.

## How we checked

Checked on 7 November 2026: each formula and each row of the table, recalculated by hand.

Not checked: the odds-format setting in any operator's app. We did not place bets or open accounts. Terms follow the glossary of the country brief.

**In short:** Only the dated items above were checked; everything marked Not checked is still open.

## Related questions

### What does evens mean?

Evens is 1/1 in fractional odds and 2.00 in decimal. A winning €10 bet returns €20, stake included.

### Is 5/1 the same as 6.00?

Yes. 5/1 returns 5 profit per 1 staked; 6.00 returns 6 in total, which is the same 5 plus the 1 stake.

### Does a lower decimal number mean a likelier outcome?

The implied chance from a price is 1 ÷ decimal, so a lower price implies a higher chance. It is a conversion, not a forecast.

**In short:** Each answer here repeats the definition; operator rules stay Not checked.

## FAQ

**What does evens mean?**

Evens is 1/1 in fractional odds and 2.00 in decimal. A winning €10 bet returns €20, stake included.

**Is 5/1 the same as 6.00?**

Yes. 5/1 returns 5 profit per 1 staked; 6.00 returns 6 in total, which is the same 5 plus the 1 stake.

**Does a lower decimal number mean a likelier outcome?**

The implied chance from a price is 1 ÷ decimal, so a lower price implies a higher chance. It is a conversion, not a forecast.