Parlay X-ray
Every price a book offers carries its cut, and a parlay multiplies the cuts. Type in each leg's price and see what the market itself thinks each leg is worth with the cut taken out, what the whole parlay should pay, and what the book keeps of every $100 you bet on it.
The other side is the opposite bet in the same market at the same book (the other team, the under). It is optional, but with it the cut is measured instead of assumed.
Leave blank to multiply the legs, as a book does for legs from different games.
This is an example parlay. Type in yours.
The book keeps $13.77 of every $100 (cut assumed on 1 of 3 legs).
A $100 bet at +616 wins $615.91 if all 3 legs land. The market's own prices, with the cut taken out, with a standard cut assumed on 1 of 3 legs, put that at 12.0% (about 1 in 8.3), so a fair price would be +730. On those chances, bet parlays like this again and again and you get back about $86.23 of every $100, on average.
| Leg | Price | Fair chance | Cut / $100 |
|---|---|---|---|
| 1vs −110 | −110 | 50.0% | $4.55 |
| 2vs −180 | +150 | 37.9% | $5.36 |
| 3cut assumed | −200 | 63.6% | $4.55 |
Each leg's cut is what you would pay betting it alone. Multiplied into one parlay they compound to $13.77 of every $100.
“Cut assumed”: with only one price, we assume the standard cut of a −110/−110 market, $4.55 of every $100. Player props and long shots usually charge more, so on those legs the real cut is likely larger than shown; a heavy favourite's market often charges less. Type the other side's price to measure it instead.
Results of different games have little to do with each other, so multiplying the legs' chances is close to the truth. If two legs come from the same game, switch to “Some share a game”.
Taking the cut out
At −110 on both sides, each side needs 52.4% to break even, and the two add up to 104.8%. That extra is how the book gets paid: on every $100 bet at −110 it keeps $4.55 on average, its cut. Remove it and each side's fair chance is 50%.
Why parlays cost more
A parlay multiplies the prices, and with them the cuts. Three −110 legs keep $4.55 of $100 each when bet alone; multiplied into one parlay they keep $13.03. Every leg you add takes another bite.
Long shots pay for it most
Betting markets tend to charge long shots more of the cut than favourites. We remove it with Shin's method (the favourite-longshot bias's best-known model), which for two sides takes an equal share off each: at +1000 against −2000 the long shot gets 6.9%, where removing it in proportion to each price would give 8.7%. Some methods give it even less, so on long shots the real cut may be larger than shown.
“Fair” is what the book's own prices say once the cut is out, not a promise of what will happen. We make no pick on any leg; this page only shows what the price charges you. Why it matters: in a handful of states that report parlays separately, parlays are 60-75% of sportsbook revenue from only 25-35% of the money bet, and the bettors it studied are “especially uninformed” about what parlays cost them on average (Stanford policy brief, April 2026; its revenue figures are from the Washington Post).
We take no referral money from any book, and our own model's picks are logged before tip-off and graded in public, whether the answer flatters us or not.
See the track recordIf parlays have stopped being fun, the National Problem Gambling Helpline is free and confidential, any time: 1-800-GAMBLER. More help.