Ballwise · free tool
Is this line a good price?
Free price-check math. Enter the odds you see and get the fair price with the book's margin taken out, or the hit rate a pick'em payout really asks of every leg.
Over / under odds
Both sides of one market, in American odds (for example -115 and -105).
How it is calculated
Each American price converts to an implied chance: a negative price -A gives A / (A + 100), a positive price +B gives 100 / (B + 100). The two implied chances add up to more than one whole; the extra is the book's margin (overround). Removing it proportionally gives the fair chance per side (multiplicative devig). The power method instead raises both chances to the same exponent until they sum to one, which shifts a little more margin onto the longer price.
Pick'em payout
Every leg must hit. Enter the number of legs and the payout multiplier.
How it is calculated
If every leg must hit and the entry pays M times the stake over L legs, the entry breaks even when each leg hits at the L-th root of 1 / M. If your fair chance per leg is above that, the payout is better than break-even; below it, the price is worse than fair.
Math tool for entertainment & information. Not a sportsbook. 21+. 1-800-GAMBLER. Results are arithmetic on the numbers you enter, not predictions.