Kalshi calculators.
Free calculators for Kalshi traders: the fee on any order, a price read as odds and implied chance, and expected value with Kelly sizing for a chance you set. They run in your browser. The math is arithmetic, not advice.
Calculators
Kalshi fee calculator
Work out the Kalshi fee on any trade. Taker and maker fees, rounding to $0.0001, total cost and break-even chance, plus a fee table by price.
Open the calculator02Kalshi odds converter
Convert a Kalshi price in cents to implied probability and American, decimal and fractional odds, with the break-even chance after the taker fee.
Open the calculator03Kelly criterion and EV calculator
Enter your probability, the price and your bankroll to get EV per contract, the Kelly fraction and a contract count, with Kalshi fees included.
Open the calculatorThe guides behind them.
Kalshi fees explained
Kalshi's taker fee is 0.07 × C × P × (1 - P), so the fee on 100 contracts at 50c is $1.75. Fee table by price, maker fees, rounding, deposits.
12 min read02Kalshi odds explained
A Kalshi price in cents is the market's implied chance. How to read YES and NO prices, convert cents to American and decimal odds, and add the fee.
14 min read03The Kelly criterion for Kalshi contracts
Full Kelly on a Kalshi contract is (p - price) / (1 - price) of bankroll. Worked numbers with fees, the NO side, half Kelly and correlated strikes.
12 min read