Decimal
2.50Includes your stake. 100 × 2.50 = 250 returned, with 150 in profit.
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See a worked example Odds converter
One bet, different formats. Enter the odds you know and see every equivalent instantly.
| Format | BackFor the outcome | LayAgainst the outcome |
|---|---|---|
| DecimalEuropean | A number greater than 1, such as 2.50. | ≈A number greater than 1, such as 2.50. ≈ means rounded. Calculations use the original input without intermediate rounding. |
| AmericanMoneyline | +100 or higher, or −100 or lower. | +100 or higher, or −100 or lower. |
| FractionalEnglish | Two positive integers, such as 3/2. | Two positive integers, such as 3/2. |
| Hong KongHong Kong | A number greater than 0, such as 1.50. | ≈A number greater than 0, such as 1.50. ≈ means rounded. Calculations use the original input without intermediate rounding. |
| MalayMalay | ≈Between −1 and +1, excluding 0. ≈ means rounded. Calculations use the original input without intermediate rounding. | ≈Between −1 and +1, excluding 0. ≈ means rounded. Calculations use the original input without intermediate rounding. |
| IndonesianIndonesian | +1 or higher, or −1 or lower. | +1 or higher, or −1 or lower. |
| Probability, %Implied probability | Greater than 0 and less than 100, such as 40%. | Greater than 0 and less than 100, such as 40%. |
≈ means rounded. Calculations use the original input without intermediate rounding.
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01 / Back & Lay
Follow the money
Choose a side and a result. This example uses the decimal odds from the selected column above.
Your stake is at risk. A win returns it plus profit: stake × (odds − 1).
Worked example · one outcomeBet accepted ✓
Back · For the outcome
Sinner to win the match
Odds2.50
Units greater than 0, up to 1 billion.
✓ Won
- Your risk
- 100.00
- Return including your stake
- 250.00
- Net result
- +150.00
02 / Format
Seven ways to write one price
Every format below corresponds to decimal odds of 2.50. The notation changes; the return does not.
American
+150Positive odds show profit for a 100 stake. Negative odds show the stake needed to make 100 profit.
Fractional
3/23/2 means 3 profit for every 2 staked. The original stake is returned separately.
Hong Kong
1.5Net profit per unit staked. Add 1 to get decimal odds.
Malay
≈ -0.666667Positive values show profit per unit staked. Negative values show the risk needed for 1 profit. At decimal 2.50, this is −2/3.
Indonesian
+1.5Like American odds, based on 1 rather than 100: +1.50 means 1.50 profit for each 1 staked.
Probability, %
40%100 / 2.50 = 40%. This is a probability implied by the price, not proof of a 40% chance.
Common questions
Can I use a decimal comma?
Yes: 2,50 and 2.50 mean the same thing. Use a slash for fractional odds: 3/2. A minus sign pasted from another app is also accepted.
Why are the Lay odds different?
The columns link opposite positions. Back odds D are equivalent to laying the same outcome at D / (D − 1), when comparing profit relative to your own risk. This is not a live exchange quote.
Does this include exchange commission?
No. This tool converts odds without commission, taxes or stake rounding. These affect the actual profit and need a separate calculation.
What about −100, −1 and +1?
At even money, American +100 and −100 both mean 2.00. Malay and Indonesian +1 and −1 are also equivalent. Both signs are accepted; the converter displays the positive convention.
Why is a value marked ≈?
Decimals are usually rounded to six places. More precision is retained near the supported limits so values remain valid when entered again. Fractional denominators are limited to one million. Calculations retain the original input; re-entering a rounded value can slightly change the result.
Got your odds? Work out your stakes.
Use decimal odds in the arbitrage calculator to split your bankroll and compare outcomes.