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Parlay
Calculator.
Parlay Calculator: What does a parlay pay, and what chance does the price give it? Enter six figures and this page returns total return on the parlay, with every line of the arithmetic printed rather than hidden. The worked example below answers 70.19 for the figures it states. Free to embed. Checked 2026-08-23.
Run it on your numbers70.19
01Run it on
Run it on
your numbers.
The fields open holding the worked example below, and the answer changes as you change them. Every line of the arithmetic is printed under the result, and the formula under that — so the answer can be checked rather than trusted.
Total return on the parlay70.19The arithmetic,
The arithmetic,
line by line.
| Step | Value |
|---|---|
| Combined odds — 1.91 × 2.10 × 1.75 | 7.0193 |
| Total return, stake included | 70.19 |
| Profit | 60.19 |
| Implied probability of all legs landing | 14.25% |
| Longest leg alone, for comparison | 47.62% |
combined odds = leg₁ × leg₂ × … × legₙ return = stake × combined odds profit = return − stake implied probability = 100 ÷ combined odds
02The worked example,
The worked example,
in plain HTML.
| Input | Value | What it is |
|---|---|---|
| Stake | 10 | Any currency or coin. The return comes back in the same unit. |
| Leg 1 — decimal odds | 1.91 | Use the odds converter first if the book quotes fractions or American prices. |
| Leg 2 — decimal odds | 2.10 | A parlay needs at least two legs; that is what makes it a parlay. |
| Leg 3 — decimal odds | 1.75 | Leave the rest blank for a shorter parlay. |
| Leg 4 — decimal odds | left blank | Optional. |
| Leg 5 — decimal odds | left blank | Optional. |
| Total return on the parlay | 70.19 | Computed by the same function the calculator above runs. The build refuses to publish this page if the two disagree. |
Three legs at 1.91, 2.10 and 1.75 combine to 7.0193, so 10 returns 70.19 for a profit of 60.19. The number worth reading is the one underneath: the price gives all three landing a 14.25% chance, against 47.62% for the longest leg on its own. Each leg you add multiplies the return and divides the chance, and the book's margin is compounded at every step.
WHAT THIS CANNOT TELL YOUWhere the answer
Where the answer
stops being one.
Every calculator on this site ends here, because the number at the top is only as good as what it leaves out — and what it leaves out is never nothing.
| Limit | What it means |
|---|---|
| What this cannot see | Implied probability is derived from the price, which already contains the book's margin — so the true chance of the parlay landing is lower than the figure shown, not higher. The arithmetic also assumes the legs are independent. They very often are not: two markets on the same fixture move together, which is exactly why books either refuse to combine them or price the combination themselves rather than multiplying it. Same-game parlays are not this calculation. |
| What it is not | Arithmetic, not advice. Nothing on this page recommends gambling, gambling more, or taking any particular bet, and no calculator turns a negative expectation into a positive one. |
03Put this on
Put this on
your own site.
Free, no account, no charge and no script of ours on your page. The snippet loads the calculator on its own in an inert frame, and keeps an attribution link outside it in your markup.
05Questions about
Questions about
this calculator.
What does a parlay pay, and what chance does the price give it?
Three legs at 1.91, 2.10 and 1.75 combine to 7.0193, so 10 returns 70.19 for a profit of 60.19. The number worth reading is the one underneath: the price gives all three landing a 14.25% chance, against 47.62% for the longest leg on its own. Each leg you add multiplies the return and divides the chance, and the book's margin is compounded at every step.
What can the parlay calculator not tell me?
Implied probability is derived from the price, which already contains the book's margin — so the true chance of the parlay landing is lower than the figure shown, not higher. The arithmetic also assumes the legs are independent. They very often are not: two markets on the same fixture move together, which is exactly why books either refuse to combine them or price the combination themselves rather than multiplying it. Same-game parlays are not this calculation.
Is the parlay calculator free to use and embed?
Yes. There is no account, no sign-up and no charge, the page works with JavaScript switched off, and the embed snippet on this page may be pasted into any site. The only thing asked in return is that the attribution link outside the frame is left in place.
Where this arithmetic comes from, and what it is worth.
The formula is printed in full on this page so it can be checked rather than taken. Solaspins asserts no figure of its own here: every number is either one you typed or one derived from it, and the worked example is generated by the same function the form runs. Last checked 2026-08-23. This is arithmetic — not financial, legal or gambling advice.