Fair Price Checker: is your parlay price fair?
Your book quoted you a parlay price. This checker works out what the ticket is really worth: enter each leg's price for your side and the other side of the same market, and it removes the book's cut from every leg, multiplies the fair chances together, and puts the fair payout next to the one you were offered. Neutral numbers, no lecture — what you do with them is your call.
Checking a league ticket? NFL version → · NBA version → · NHL version → · MLB version →
Your legs
American odds (for example -110 or +200). Use prices from one book for the whole ticket — a parlay is placed at a single book, so its fair price is read from that book's own market.
The headline
This ticket's real odds, from the market's fair price
| Your book | Fair price | |
|---|---|---|
| Parlay odds | ||
| Chance it implies | ||
| Payout on your stake |
The book's cut is the gap between the two payouts, as a share of the fair payout. It is information about the price, not a prediction about the ticket. Lines move — re-check with current prices before you bet. Same-game parlays are repriced by books for correlation, so this multiplication does not describe them. Legs with no two-sided market (some alt lines and touchdown props) cannot be checked this way; their fair chance is an estimate, not a market price.
How it works, in 20 seconds
- Each price hides a chance. -150 implies 60%; +200 implies 33.3%.
- Both sides add to more than 100% — the extra is the book's cut. Scaling the two sides so they add to exactly 100% leaves the market's fair price for your side.
- Fair chances multiply. Three true coin flips: 0.5 × 0.5 × 0.5 = 12.5%, or 1 in 8 — a fair payout of +700. A book paying +596 on that ticket keeps about 13% of the fair payout.
- Compare. The checker puts your book's price and the fair price side by side, on your stake.
Want the machine to do the shopping?
Moonshot Parlays builds a ticket from real sportsbook lines — all checked against the market's fair price — and shows its real odds and what each book pays, at one picked book so the ticket can actually be placed there. Free, no sign-up.
Price a parlay in 3 seconds →