Tools › Kalshi parlay calculator
Example legs from Kalshi games, snapshot September 25, 2026 at 13:49 UTC · runs in your browser
A Kalshi combo pays $1 only if every leg wins, so for independent legs its fair chance is the product of the leg prices. This week's two most traded games, Kimberly Birrell to beat Katie Volynets (66%) and Talia Gibson to beat Maria Sakkari (52%), combine to 34.9%, a fair combo price of 34.9¢ or +186 in American odds. A quote above that asks you to pay for the bundling; legs from the same game are correlated and do not multiply.
Legs counted: 2
Chance all legs win (independent): 34.91%
Fair combo price: 34.9¢ · American odds +186
Quote vs fair price: -
Empty legs are ignored. Fees are not included.
Each leg's price is the market's chance for that outcome. If the outcomes do not affect each other, the chance that all of them happen is the product: three legs at 80%, 75% and 70% give 0.80 x 0.75 x 0.70 = 42%. Every leg you add lowers the chance and raises the payout. Kalshi combos are separate markets quoted on request; a filled combo cannot be canceled, so check the quote against the fair price first.
Related: what a combo is on Kalshi · odds converter · no-vig calculator · TENNIS games · all tools
Multiply the chances of the legs: two legs at 70% and 60% give 0.70 x 0.60 = 42%, so the combo is worth about 42 cents a contract before fees. That only holds when the legs are independent, such as results of different games.
Combos are quoted on request by other traders, and a quote above the product of the leg prices means you pay extra for the bundle. Compare the quote with the calculator's fair price before you accept it.
They are correlated: a team winning big and the total going over tend to happen together, so their joint chance is not the product of the two prices. The calculator's number is only a guide for independent legs.
No. The trader who accepts a combo quote pays the equivalent of a taker fee; see the combo entry in the glossary and the fee calculator.