Free tools
Do the price math before you bet.
Nine free calculators for the numbers behind a price: convert odds, remove the vig, size a stake, hedge a position or split an arb. No account needed.
Informational, not betting advice. 21+.
Odds Converter
American, decimal, fractional and implied probability, in any direction.
Free, no account needed
Implied Probability Calculator
One price to a win probability, or a probability to fair odds.
Free, no account needed
No-Vig Fair Odds Calculator
Fair odds and true probability for a two- or three-way market, four methods.
Free, no account needed
Vig Calculator
What a two-sided market charges and what the fair price is.
Free, no account needed
Expected Value Calculator
Offered price plus a fair probability in; EV %, EV $ and a quarter-Kelly stake out.
Free, no account needed
Kelly Calculator
Size a wager from your edge and bankroll, full Kelly down to an eighth.
Free, no account needed
Parlay Calculator
Combine 2 to 10 legs into one price, payout and probability.
Free, no account needed
Hedge Calculator
The same result whichever side wins, or just the stake back.
Free, no account needed
Arbitrage Calculator
Two books, two prices. See if the split pays no matter who wins.
Free, no account needed
How these fit a price check
A check prices your betslip screenshot against the listed sportsbooks and a fair market price. These tools do the same math by hand, one number at a time. Use them when you already have a price and want to convert it, size a stake, hedge or sanity-check it.
Now check a real price.
Screenshot a betslip and EdgeFast compares your price with the listed sportsbooks and a fair market price.
Informational, not betting advice. 21+.