The same price, made clear
Odds converter
Enter a price in the format you have.
Enter a price above 1, such as 2.50.
Example loaded. Replace it with your own price.
Implied probability
40.00%
A price of 2.50 implies a 40.00% chance.
- Decimal
- 2.50
- Fractional
- 3/2
- American
- +150
Implied by the price. It is not a forecast of the outcome.
How the conversion works
Implied probability = 100 ÷ decimal odds. Decimal 2.50 therefore implies 40%. Fractional 3/2 and American +150 express the same price.
Decimal odds include the original stake. Fractional odds describe profit relative to the stake. Positive American odds show profit on a stake of 100; negative odds show the stake required to profit 100.
Displayed conversions are rounded. This calculator does not remove the bookmaker margin or estimate a team's true chance.
See the whole ticket
Accumulator calculator
Enter your stake and the decimal price of each selection.
Selections 2 / 12
Example loaded. Replace it with your own selections.
Potential total return
37.80
If both selections win.
- Your stake
- 10.00
- Potential profit
- 27.80
- Combined odds
- 3.78
Total return includes your stake. Amounts use the same currency as your stake.
How returns are calculated
Multiply each selection's decimal odds, then multiply by your stake. A stake of 10 at 1.80 × 2.10 gives a potential return of 37.80, including 27.80 profit.
Every selection must win. A losing selection loses the accumulator. Remove a void selection to recalculate using the remaining selections; bookmaker settlement rules still apply.
This is a standard accumulator calculation. It excludes boosts, free bets, each-way terms, taxes and fees. Related selections may have a different combined price.
Understand the market price
Margin calculator
Use every outcome from the same bookmaker and market.
Decimal odds. Include all possible outcomes.
Example loaded. Replace it with your bookmaker's prices.
Bookmaker overround
5.94%
The market adds 5.94 percentage points above 100%.
- Total implied probability
- 105.94%
- Reference total
- 100.00%
- Outcomes included
- 3 of 3
Overround is a pricing measure, not your expected loss or the bookmaker's guaranteed profit.
What the margin means
Add 100 ÷ decimal odds for every outcome, then subtract 100. The amount above 100% is the market's overround, commonly called its margin.
Compare complete markets with the same settlement rules. A lower overround does not mean every individual selection has a better price.
If the total is below 100%, check for missing outcomes, mismatched markets, stale prices or prices from different bookmakers. A negative result alone does not establish a usable arbitrage.