Parlay Payout Calculator

Leave Odds 1 at 1.9, Odds 2 at 1.85, Odds 3 at 0, and Stake at $100. Calculate. Total Payout is $351.50, Profit is $251.50, and Combined Odds are 3.52. A two-leg parlay multiplies the decimals: 1.9 × 1.85 = 3.515, which the combined field rounds to 3.52, then payout = 100 × 3.515 = 351.50 exactly. Profit is payout minus stake. Odds 3 stays at 0 to mean "unused"; the engine skips any leg at or below zero rather than treating it as a dead multiplier.

Add a third leg by setting Odds 3 to 2.0. Combined becomes 1.9 × 1.85 × 2.0 = 7.03, payout $703.00, profit $603.00. That is the entire product rule. There is no hidden "parlay juice" inside this calculator; any extra vigorish lives inside the three prices you typed. A book that posts a two-team parlay at +150 when 1.9 × 1.85 said 3.515 (about +252) is not using this product; they are using a posted parlay card. Compare the two.

Stake scales linearly. $25 on the default two-leg returns $87.875, displayed according to the currency formatter as $87.88. The combined odds figure does not change with stake. Use Combined Odds to compare tickets; use Total Payout to size a hedge (hedge stake ≈ payout / opposing odds).

Odds are decimal. Convert American +150 to 2.50, −110 to 1.909, +100 to 2.00 before you type. A 1.9 and a 1.85 are roughly −111 and −118, a typical football / basketball two-side parlay. Same-game parlays (SGPs) that correlate the legs are still multiplied here as if independent; the payout is still the product of the posted SGP prices, which already embed correlation. Do not multiply raw singles prices to "check" an SGP; the book did not price it that way.

This is a payout calculator, not a probability calculator. Nothing in the output says the ticket is 1/3.515 ≈ 28.4% likely. That conversion would be valid only if the odds were fair. They are not. For a probability-of-winning figure, use the parlay probability tool with your own p estimates, then compare to 1/combined.

A parlay (accumulator, multi, combo) is a single stake that is sequentially at risk on every listed leg. If any leg loses, the stake is gone. If all win, the stake is multiplied by every decimal price. The attraction is obvious: two ordinary 1.90 prices become 3.61, three become 6.86, and a $100 ticket starts to look like a future. The cost is equally obvious: the book's margin compounds. Independent 4.5% overrounds on two 1.91 prices do not add; they multiply, and the parlay's expected value is worse than either single.

This calculator implements the product that a modern decimal-odds book uses for a straight multi: combined = o1 × o2 × (o3 if o3 > 0 else 1), payout = stake × combined. It does not implement the American parlay-card table that paid 13/5 on two 6-point football sides regardless of the true moneyline, nor the teaser card (that is a different tool). If your ticket was built on a posted 2-team / 3-team / 4-team grid, type those grid prices as if they were o1 with o2 = 1 and o3 = 0, or simply ignore the product and treat the card as a one-number payout.

Same-game parlays, which exploded in the 2020s, are priced by a correlation engine, then displayed as a single decimal. You can still drop that decimal into Odds 1 and leave the others at 0 / unused if you only want payout on a known SGP price. Multiplying the three underlying legs' standalone prices will usually overstate the SGP payout (positive correlation, e.g. quarterback passing yards with team moneyline) or understate it (negative correlation). The product rule here is mechanical, not a correlation model.

History: British accumulators and American parlays are the same algebraic object with different juice traditions. A UK acca on football often allows five 1.50 prices to become 7.59; the UK operator's overround per 1X2 market is already large, and five stacked markets are a factory. US sportsbooks historically sold parlay cards with worse-than-product payouts and then, under exchange and app competition, moved toward multiplicative pricing on built-your-own parlays while keeping the juice inside each leg.

Limits: three legs maximum in this form, skip-zeros, no each-way acca, no "if cash" / "if win" sequence, no dead-heat reduction, no rule-4, no partial void (a voided leg should be treated as odds 1.0, which you can type). Profit assumes all listed positive-odds legs win. Combined Odds of 3.52 on the default is 3.515 rounded to two decimals; payout uses the unrounded product.

A parlay, also called an accumulator, multi, or combo, is a single stake that is sequentially at risk on every listed leg. If any leg loses, the stake is gone. If all win, the stake is multiplied by every decimal price. The modern decimal-odds identity is the product rule. Combined odds equal the product of the included legs. Payout equals stake times combined odds. Profit equals payout minus stake. A third price of zero means unused: it is omitted from the product rather than multiplied as a zero, which would annihilate the ticket. There is no hidden parlay juice inside this product; any extra vigorish already lives inside the prices you typed.

The published defaults are 1.90 and 1.85 on two legs, a third leg of 0, and a stake of 100. Combined odds equal 1.90 × 1.85 = 3.515, displayed as 3.52 after ordinary two-decimal rounding. Payout equals 100 × 3.515 = 351.50. Profit equals 351.50 − 100 = 251.50. Add a third leg of 2.00 and the product becomes 3.515 × 2.00 = 7.03, payout 703.00, profit 603.00. Stake scales linearly: 25 on the default two-leg returns 87.875 before display rounding. A book that posts a two-team football parlay at American +150 when 1.90 × 1.85 already said 3.515 (about +252) is not using this product; they are using a posted parlay card. Compare the two.

Independence is the modelling assumption, not a fact about Sunday. If each price were a fair 1/p_i, the fair parlay price would be 1 over the product of the p_i, which is exactly the product of the fair decimals. Real prices satisfy an overround: implied probabilities on a two-way sum to more than one. The multiplicative parlay then has expected value equal to stake times (p1 p2 … pn times combined minus 1), which is more negative than a single leg whenever each (p_i times o_i) is less than one. Margin compounds. Two independent 4.5 percent overrounds do not add; they multiply. That is the cost of the attractive 3.52 quote.

History of the ticket is older than decimal screens. British accumulators, American parlays, and Australian multis are the same object. Same-game parlays break independence because a quarterback passing yardage and a team total share a sample space; the product then overstates the fair combined price if the legs are positively correlated on the winning path you need. This worksheet does not know correlation. It multiplies the decimals you type. Teasers are a different contract: spreads move in your favour and the payout card is worse than the raw product. Use the teaser worksheet for that card.

Assumptions: all listed positive legs must win, voids are not modelled, odds are decimal and net, the unused third field is dropped. A four-leg ticket needs you to fold the fourth price into one of the three fields or to multiply by hand. The worksheet reports combined odds, total payout, and profit. It is the product rule, not a forecast that all three sides will land.