Point Spread and Run Line Calculator
A spread bet adds the line to your side's score and compares it with the other side's: higher covers, level is a push, lower loses. At the usual -110 a $110 bet returns $210, and the bet has to win 52.38% of the time to break even. Type a line, a price and a final score to see all of it worked.
Spread bets, graded and priced
A spread bet is settled on the final margin, not on who wins. Type the line, the price and a score to see whether it covers, what it pays and how often it has to win to break even.
Minus is the favorite laying points, plus the underdog taking them. -110 means $110 risked to win $100.
The final score
Overtime counts. Leave the score blank to see the price alone.
Every final margin
The other side's price (optional)
Moneyline
Run line
The defaults are BettingUSA's Rays and Rangers prices, used in our run line guide.
A run line has action only when the game goes 9 innings, or 8.5 with the home side ahead, under DraftKings' house rules; a game called sooner voids it even where the moneyline is graded. Extra innings count.
How is a point spread bet graded?
On the margin, not the winner. The favorite carries a minus number and has to win by more than it; the underdog carries a plus number and covers by winning or by losing by less than it. A final margin that lands exactly on a whole-number line is a push, and the stake comes back. That is how DraftKings' market rules grade it, and other books state the same.
| Line | Your side covers when it | Push |
|---|---|---|
| -3.5 | wins by 4 or more | never |
| -3 | wins by 4 or more | wins by exactly 3 |
| +3.5 | wins, or loses by 3 or fewer | never |
| +3 | wins, or loses by 2 or fewer | loses by exactly 3 |
| -1.5 (run line) | wins by 2 runs or more | never |
| +1.5 (run line) | wins, or loses by 1 run | never |
The half point, the hook, is there so a game cannot land on the number: no game ends with half a point. In the NFL a tie also covers for a plus line, since the underdog lost by nothing. Overtime and extra innings count: the standard wording, as Sports Betting Dime reports it, is "all bets include overtime unless otherwise stated."
How do you calculate a spread bet's payout?
From the price, not the line. A minus price is what you risk to win $100; a plus price is what $100 wins. Most NFL and NBA spreads are -110 on both sides, so $110 wins $100, and Covers.com shows where the book's cut comes from: with $110 on each side it holds $220, pays the winner $210 and keeps $10, about 4.5%, whichever side wins. The chance a price implies is also the rate it must win at to break even.
| Price | $100 wins | Risk to win $100 | Break-even |
|---|---|---|---|
| -105 | $95.24 | $105 | 51.22% |
| -110 | $90.91 | $110 | 52.38% |
| -115 | $86.96 | $115 | 53.49% |
| -120 | $83.33 | $120 | 54.55% |
| -140 | $71.43 | $140 | 58.33% |
| +100 | $100.00 | $100 | 50.00% |
| +120 | $120.00 | $83.33 | 45.45% |
| +150 | $150.00 | $66.67 | 40.00% |
A push pays nothing and costs nothing: the stake is returned and the bet is as if it was never made.
What does a 1.5 run line mean in baseball?
Baseball's spread is almost always 1.5 runs. The favorite at -1.5 has to win by two or more; the underdog at +1.5 covers if it wins or loses by one. Because a one-run game is common, the favorite's run line pays more than its moneyline, and the underdog's costs more. The second panel above works out how much of that gap is the book's price on a one-run favorite win. With BettingUSA's Rays and Rangers prices, the Rays at -170 to win imply 63.0% and at +120 on -1.5 imply 45.5%: about 17.5 points of the Rays' chance is a one-run win, and the Rangers' side of both markets gives the same figure.
A run line also settles differently in a short game. Under DraftKings' house rules, filed with the Massachusetts Gaming Commission, it has action only if the game goes 9 innings, or 8.5 with the home side ahead, while a moneyline can be graded earlier. A rain-shortened game can grade the moneyline and void the run line.
Read more
The guides behind the calculator: NFL point spreads explained, NBA point spreads for beginners, run lines explained, run line or moneyline on a big favorite and alternate run lines and how they pay.
Sources: DraftKings, market rules and house rules (18 Aug 2025); Covers.com; Sports Betting Dime; BettingUSA. Each book's own rules decide how a bet is settled; read them before you bet. The calculator works only from what is typed in and nothing leaves the page. Betting is for adults where it is legal in your state (where live betting is legal). If gambling stops being fun, call or text 1-800-MY-RESET.