The short version: a Kalshi price is a probability, stated in cents. A contract trading at 63 cents means the market currently prices that outcome at roughly 63%, nothing more mysterious than that arithmetic. Every event contract on the exchange works the same way, priced between 1 and 99 cents, moving continuously as new information and new orders arrive, and settling at exactly 100 cents if the outcome resolves yes or exactly 0 cents if it resolves no. Nothing in between, no partial payout. Buy a contract at 63 cents and hold it to resolution: win, and it pays 100 cents, a 37 cent profit; lose, and it's worth nothing, a 63 cent loss. Higher price, smaller potential gain, smaller potential loss. That asymmetry is the entire mechanism, and the worked example and calculator below make it concrete instead of abstract.
Read the Price as a Percentage, Not as an Odds Line
Skip the mental conversion most people try to do first. A sportsbook hands you odds (plus-money, minus-money, a spread with juice attached) and expects you to translate that in your head into what it actually thinks will happen. Kalshi skips the translation step entirely. The price is the probability. A contract at 30 cents means the market currently prices that outcome at about 30%. A contract at 80 cents means about 80%. There's no vig folded into the number and no house cushion hiding in the quote, because there's no house setting the price at all, just buyers and sellers meeting somewhere in the middle of what they each think is likely.
That's a genuinely different object than a betting line, even when it's pointed at the same underlying event.
A Worked Example (Illustrative, Not a Live Quote)
Picture a contract asking a plain yes/no question: will a specific team win a specific game this weekend. None of the numbers below are pulled from a real, current Kalshi market. They're invented to make the mechanism concrete, the same way a textbook says "assume a train leaves the station at 60 miles per hour" without implying a real train exists anywhere.
Say that contract is trading at 63 cents. Read straight, the market currently thinks there's about a 63% chance that team wins. Buy one contract at that price and exactly two things can happen. If the team wins, the contract resolves at 100 cents, and the 63 cents you paid becomes 100, a 37 cent profit. If the team loses, the contract resolves at 0, and the 63 cents is gone. That's the whole payout structure, with no fine print buried underneath it beyond whatever trading fee the exchange or a broker applies on top (a different page's subject, not this one's).
What Actually Moves the Price
A price like 63 cents isn't set by an exchange employee reading a formula off a sheet. It's set the way a stock price is set: by whoever is willing to trade at that level, continuously, all day. If new information makes the outcome look more likely (an injury report, a weather shift, a polling update, a line from a Fed official's speech, depending on the contract), buyers start bidding the price up and it climbs toward 100. If the opposite happens, sellers push it down toward 0. A contract that opens at 40 cents on Monday and closes at 71 cents by Friday isn't malfunctioning. It's five days of new information getting absorbed into one number, trade by trade.
This is also where the sports-familiar instinct misleads people the most. A sportsbook's line moves to balance its own liability, keeping roughly equal money on each side so the book profits from its built-in margin regardless of outcome. A Kalshi price moves for close to the opposite reason: to reflect what traders actually believe, with no liability to balance and no margin protecting a house that isn't there. Worth sitting with for a second, because it's the actual difference, not a cosmetic one.
Two Outcomes, Nothing In Between
Every Kalshi contract settles at one of exactly two values once the underlying event resolves: 100 cents if the answer is yes, 0 cents if the answer is no. There's no partial credit and no settling at 55 cents because the outcome was almost true. A contract held through resolution either pays out in full or expires worthless, a sharper edge than most new traders expect walking in from a sportsbook, where a push or a partial cash-out can soften an outcome.
You don't have to hold to resolution, either, and most active traders don't. A contract can be sold back into the market at whatever the current price is, days or weeks before the event resolves, the same way a stock can be sold ahead of an earnings call instead of held through it. The 100-or-0 settlement is what happens at the end of the road. It isn't the only way to realize a gain or a loss along the way.
Run the Numbers Yourself
Enter any price between 1 and 99 cents below and see what a yes resolution and a no resolution would each mean at that price, per contract and for an illustrative batch of ten. This tool doesn't pull from Kalshi's live markets, it has no idea what's actually trading right now, and it isn't financial advice. It's the arithmetic from the sections above, made interactive so you can test a few numbers instead of just reading them.
If You're Trading Through a Broker, the Math Doesn't Change
Everything above describes how Kalshi itself prices a contract, and that mechanism doesn't shift depending on how you reach the exchange. The price you see and the 100-or-0 settlement underneath it are the same either way, whether you trade through a direct Kalshi account or through a licensed broker routing your order in on your behalf. How a broker actually gets you onto Kalshi covers that routing mechanism in full, seat, order flow, settlement, for anyone trying to understand how the order reaches the exchange rather than how the price itself behaves.
This page is one piece of a bigger picture. The full tour of what actually trades on Kalshi, sports through weather, sits above this one and is worth reading first if you landed here without that context. Both pages sit under the Forecast Access homepage, which maps the markets question and the access question side by side.