Do the math
before the pick.
Seven calculators for sports picks and prediction markets. They work with American, decimal, fractional, cents and percentage prices, run in your browser, and save nothing.
Arbitrage and hedge calculator
Split a stake across two or three outcomes so every result pays the same, or hedge a pick you already made.
Open →Prediction market calculator: Novig %, Kalshi and Underdog cents
Turn a Novig percentage or a Kalshi or Underdog contract price into sportsbook odds and a payout, fees included.
Open →Parlay calculator
Combined odds, payout and the real chance of hitting, for up to 12 legs. Pushes drop out.
Open →Odds converter and implied probability
American, decimal and fractional odds side by side, with the win chance each price needs.
Open →No-vig fair odds and hold calculator
Strip the house edge out of a two- or three-way market to see the fair price and the hold.
Open →Expected value (EV) calculator
What a pick is worth on average, from your price and your own win chance or a fair line.
Open →Bonus and free-pick value calculator
What a first-purchase match, bonus cash or free pick is worth once the playthrough is done.
Open →Calculators do math, not predictions, and no price is a sure thing. Never treat picks or trading as a way to make money. 21+. Play responsibly. Looking for where to play? See sweepstakes sportsbooks and prediction markets.