Kalshi Parlay Calculator: Combo Odds & Payout
Updated October 17, 2026
Multiply your legs into a fair payout, then paste Kalshi's quote to see what the market maker is keeping — fee included, free.
A Kalshi parlay (also called a combo or multi-leg) ties two or more prediction market contracts together so every leg must resolve YES for the parlay to pay. For independent legs the joint probability is the product of each leg's price. Kalshi does not price a combo that way: a market maker quotes you a payout when you request it, and that quote is usually shorter than the legs multiplied. This free calculator gives you the fair number and your break-even before you request, then grades the quote that comes back. To read a single leg first, convert Kalshi cents to American odds.
Stacking legs from the same match? This calculator assumes the legs are independent (it multiplies them), which misprices a same-game combo. Use the free Combo Edge Builder instead — it prices the correlation-aware joint probability and grades the quote your platform gives you. The model is explained there. →
Which one? Combo Builder = joint probability and fair price for independent legs; Combo Edge Builder = correlation-aware same-game edge on a quoted price.
Quick Answer
PredictionMarketsPicks' Combo Builder computes the joint probability and combined payout for a multi-leg Kalshi parlay, with break-even and EV comparison. For independent legs the joint probability is the product of each leg — two legs at 70% and 65% give 45.5% — a 2.20x fair payout. Kalshi's combo quote comes from a market maker and usually pays less; the gap is the maker's margin, and the calculator shows it next to your break-even multiplier with the taker fee included.
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Chain multiple Kalshi markets together like a parlay
What is this?
Think of Kalshi Combos like parlays — you link multiple YES/NO predictions together and the payout multiplies. The catch: Kalshi's combo price comes from a market maker's quote, not the legs multiplied.
The Combo Builder gives you the fair payout and your break-even number before you request, then grades the quote that comes back, so you know what the maker is keeping.
Real-World Example
→ Your 3-Leg Combo
Three legs from different games: Chiefs win at 62¢, Celtics win at 55¢, a third game over at 70¢ (illustrative prices).
Multiplied out: 0.62 × 0.55 × 0.70 = 23.9%, a fair payout of 4.19x. Kalshi's maker quotes 3.6x, so the maker is keeping about 14% of the fair payout. At the market's own odds, that is a decline.
✅Action: Know your number before you request. Only take a quote that clears it, which means you think a leg is underpriced.
Bottom line: Legs multiplied is the fair price. The quote is what you actually get. This tool shows you the gap.
Full guide →1 · Your legs (3/6)
Enter the Kalshi price of the side you are taking. “Your %” is optional — leave it blank to use the market's number.
Legs multiplied
23.9%
23.9¢ fair price
Fair payout
4.19x
if priced off the legs
Your odds
23.9%
market — add your %
Your number
4.42x
break-even · +10% at 4.86x
Request the combo on Kalshi and type the payout the market maker quotes back. Anything under 4.42x loses money at the market's odds, fee included.
This calculator treats legs as independent. Legs from the same game move together — a team's win and its points over usually hit together — so multiplying them is wrong. For same-game combos use the free Combo Edge Builder, which prices the correlation.
How Kalshi Combos Work
A Kalshi combo (also called a multi-leg or parlay) ties several contracts into one ticket that pays $1.00 only if every leg resolves your way. For independent legs the fair price is the legs multiplied: 70¢ and 65¢ make 45.5¢, a 2.20x payout. Four 60¢ legs make about 13¢, a 7.7x payout.
Kalshi does not sell you the combo at that number. When you build a combo, Kalshi requests a quote from market makers (an RFQ), and the payout that comes back is usually shorter than the legs multiplied. That gap is the maker's margin, and the taker fee comes on top. So at the market's own prices, most combo quotes are slightly negative-EV. That does not make combos bad. It means you should know your number before you request.
A combo quote is only worth taking if you think at least one leg is underpriced. Type your own probability on that leg and the calculator re-grades the quote. If the quote comes back short, decline and request again. Quotes refresh and a different maker may answer. You can also buy the legs separately and skip the margin.
Compare Kalshi parlays to sportsbook parlays
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Frequently Asked Questions
How do you calculate the odds of a Kalshi combo?
Multiply the price of each leg. Two legs at 70¢ and 65¢ give a joint probability of 0.70 × 0.65 = 45.5%, a fair price of 45.5¢ and a fair payout of 2.20x. That is only right when the legs are independent — different games, different events. Legs from the same game move together, so for those use the free Combo Edge Builder, which prices the correlation from a scoreline model.
Is Kalshi's combo price just the legs multiplied?
No. A Kalshi combo is priced by a market maker who quotes you a payout when you request it (an RFQ), and that quote is usually shorter than the legs multiplied — the gap is the maker's margin. Paste the quote into the calculator (3.6x, +260 or 28¢ all work) and it shows the share of the fair payout the maker is keeping, your all-in cost with Kalshi's taker fee, and whether the quote clears break-even at your odds.
How do I know if a Kalshi combo quote is worth taking?
Check it against your number — the lowest payout that breaks even at your odds with the fee included. If you think the legs are priced right, a quote under the legs-multiplied payout loses money by construction. A quote only clears when you believe at least one leg is underpriced: enter your own probability in the Your % box and the calculator re-grades the quote as Clears your number, Thin or Decline. If it is thin or a decline, decline and request again — quotes refresh and a different maker may answer.
Is the Kalshi combo calculator free?
Yes. Every number on the page — joint probability, fair payout, your number, the quote verdict and the maker's cut — is free with no account, for up to 6 legs.
When should I use a combo instead of separate Kalshi trades?
Use a combo when the quote clears your number and you want one ticket that pays only if everything hits. Use separate trades when you have an edge on one market and want to size it with the Kelly Criterion, or when the combo quote keeps coming back short — buying the legs individually avoids the maker's margin, though each leg then settles on its own.
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