Calculate parlay from your inputs, with a result breakdown and worked steps.
Parlay Formula and Method
Combined odds = 1.8 × 2 × 1.5
Enter one decimal price for each leg and the cash stake for the entire ticket. Product-priced parlays multiply leg prices, then multiply that combined price by the stake for the all-win return. Subtract the original stake once to find net profit on the complete ticket.
How to Use This Calculator
Enter a cash stake and 1–12 decimal leg prices, separated by commas, spaces or new lines. Choose one currency label; it does not convert exchange rates. Select Calculate for the all-win return and profit. Decimal prices must be 1.000001–10,000 and the stake 0.01–1,000,000,000 in the selected currency; these are calculator bounds, not sportsbook acceptance limits.
Worked Example
With 100 USD and decimal prices 1.8, 2 and 1.5, the combined price is 5.4. Total return is 540.00 USD, including the 100.00 USD stake; net profit is 440.00 USD. The break-even joint win probability before charges is 1/5.4 ≈ 18.518519%. This does not estimate true win likelihood.
Return = stake × combined odds
Input and Example Guide
| Input or category | Example or weight | Entry guidance |
|---|---|---|
| Money unit | U.S. dollars (USD) | Currency label only; no exchange-rate conversion. |
| Cash stake (selected currency) | 100 | Use the stated unit; retain available precision. |
| Decimal odds, one per leg (decimal prices) | 1.8, 2, 1.5 | Use decimal prices separated by commas, spaces or new lines. The price range is 1.000001–10,000; at most 12 legs are accepted. |
Interpreting the Result
The quoted payout rule matters. Correlated selections, same-game products, boosts and special settlement can use a price different from a simple product. The reciprocal of the combined price is a break-even joint probability; it is not evidence that the component outcomes are independent or likely to win.
Use the sportsbook’s final quoted price for correlated same-game combinations. Multiplying separate leg prices is valid only when that payout rule applies; it does not establish independent win probabilities.
Assumptions and Common Input Errors
The return includes the original cash stake. This is an all-win cash-stake product model, without void/loss settlement, free-bet rules, boosts, fees or taxes. Confirm the accepted combined price and payout limits. Displayed currency amounts round to two decimals; arithmetic retains input precision. The currency selector changes only the label. A single leg is allowed for comparison.
Saving and Revising a Scenario
A successful calculation is saved in this browser and can be restored on the next visit. Editing an input marks the prior result as stale; select Calculate to update it. Reset clears personal inputs and this calculator’s saved result. Restoration does not count as a new calculation or take focus.
Sources
Betfair: How odds work defines decimal returns including stake. Betfair: Multiples betting describes product-priced multiples and checking the available price. Its legacy interface limits are not this calculator’s 1–12 leg range. Arithmetic and excluded settlement scenarios are specified above.
