Odds calculators

Free, no sign-up, nothing leaves your browser. For what the terms mean, see the Glossary.

Odds converter

Enter any one format; the other two fill in. American odds look like -110 or +150.

No-vig (fair) odds

A book's two prices add up to more than 100%. The extra is the vig. Enter both sides to see the fair chance of each and how much the book keeps.

Parlay payout

Enter each leg's American odds, separated by commas.

Expected value and Kelly

Your own estimate of the chance of winning against the price on offer. A positive EV only means your estimate beats the price, not that the bet will win.

For information only. ArchivePicks does not take bets and does not tell you which side to take.