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.
Back more than one outcome
Dutching calculator
Split one stake across several selections so every winner pays the same.
Selections 2 of 12
Decimal odds, one price per outcome.
Example loaded. Replace it with your own prices.
Equal return if any selection wins
56.00
Every selection returns 56.00. Profit whichever wins.
- Total stake
- 30.00
- Profit whichever wins
- 26.00
- Market total
- 53.57%
Stakes are rounded to two decimals; tiny differences in return between selections are rounding, not error.
How dutching works
Each stake is the equal return divided by that selection's odds, and the equal return is your total stake divided by the sum of the implied probabilities. Every winner then returns the same amount.
Dutching only profits when the prices you cover add up to less than 100% implied probability. Covering two of many runners can do that; covering a whole market at one bookmaker never does, because the margin sees to it. Across bookmakers, use the arbitrage calculator.
This calculator does not judge whether your selections are good. It only divides the stake.
Compare bookmakers
Arbitrage calculator
Enter the best price on each outcome, wherever you found it, and see whether they add up below 100%.
Outcomes 2 of 12
Best decimal price on each outcome. Cover the whole market.
Example loaded. Replace it with your own prices.
Locked-in return
103.73
Below 100%. Staked as shown, every outcome returns 103.73.
- Market total
- 96.40%
- Profit whichever wins
- 3.73
- Return on stake
- 3.73%
Stakes are rounded to two decimals; tiny differences in return between outcomes are rounding, not error.
What makes it an arbitrage
Add 100 ÷ odds for every outcome. Below 100% and the outcomes can be covered for a guaranteed return; the gap is the profit. Above 100% and there is no arb, whatever the stakes.
Real arbs are small, short-lived and come with practical risk: a price moves before your second bet lands, a bookmaker voids one side, or an account gets restricted. Getting money to the right book fast, without paying twice in fees, is most of the edge; that is what the wallet guides cover.
Prices from different bookmakers must be for the same market with the same settlement rules.