Kalshi arbitrage calculator
Drop in Kalshi's YES and NO best-ask prices (in cents like 42, or decimal like 0.42) and see whether the binary contract has a guaranteed edge. Switch to multi-outcome mode for events like "Speaker of the House" or "Fed rate band" where three or more mutually-exclusive YES legs sum to less than $1.00.
Kalshi charges a contract fee that scales with price. Use 1–3% as a working estimate.
Result
Enter a price for every outcome. Use cents (42) or dollars (0.42).
Kalshi contracts settle at $0 or $1. Edge is theoretical at displayed prices — actual fills depend on order book depth and your speed to the second leg.