Kalshi does not offer native parlays, but you can replicate one by rolling the proceeds of one winning contract into the next. This calculator shows the combined probability and payout of stacking up to four legs, so you can see what a Kalshi parlay would actually pay before you try to build it. To build one from real live markets instead, use the Parlay Builder at contracttax.com/parlay-builder.
Enter each contract's price in cents. Only the legs you fill in are counted. The result assumes the legs are independent and that you reinvest the full proceeds at each step.
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A parlay only pays if every leg hits, so the combined probability is the product of the individual probabilities. Because a Kalshi price is roughly the implied probability of yes, multiplying the prices (as decimals) gives the combined chance of the whole parlay landing.
The payout multiplier is one divided by that combined probability. Three 50-cent legs each are a coin flip, so they combine to a 12.5 percent chance and roughly an 8x payout before fees.
Kalshi has no one-click parlay ticket. To build this yourself you would buy the first contract, wait for it to settle, then put the proceeds into the next, paying a trading fee at each step. Those fees compound and pull the real payout below the figure shown here.
The math also assumes the legs are independent. Correlated markets, like two outcomes in the same game, do not multiply cleanly, and stacking them can be far riskier than the numbers suggest.