Fractional odds to decimal odds
Fractional odds state profit against stake, so 5/2 means 5 profit for every 2 staked. See the same odds in the other formats here.
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How to use it
- Enter profit (first number) and stake (second number).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Decimal = a/b + 1. American = +100 × a/b when a/b ≥ 1, otherwise −100 × b/a. Implied probability = b ÷ (a + b).
Example
Inputs: Profit (first number) = 5, Stake (second number) = 2. Result: Decimal odds: 3.5; Implied probability: 28.5714%.
Limits and caveats
- Implied probability reflects the quoted price, including the margin of whoever set it, not the true chance of the event.
- American odds are rounded to 2 decimal places.
Questions about this tool
What do odds of 1/1 mean?
Profit equal to the stake, which is 2.00 in decimal, +100 in American and a 50% implied probability.
Why add 1 for decimal odds?
Decimal odds include the returned stake as well as the profit, while fractional odds show the profit only.
How do I read 4/6?
4 profit for every 6 staked: about 1.67 decimal, −150 American and a 60% implied probability.