Point Spreads Explained: How to Read and Bet Them

The point spread exists to make a lopsided game a fair bet. Instead of just picking a winner, you're betting on the margin of victory. The favorite has to win by more than the spread; the underdog can lose by less than the spread — or win outright — and still cash your ticket. It's the most popular way to bet football and basketball for exactly that reason: it turns a blowout mismatch into a roughly 50/50 proposition you can actually price and attack.

Reading the number

A spread looks like this: Chiefs −6.5, Broncos +6.5. The minus sign marks the favorite giving points; the plus sign marks the underdog getting them.

• Bet the Chiefs −6.5 and they must win by 7 or more to "cover" the spread.
• Bet the Broncos +6.5 and you win if they lose by 6 or fewer — or win the game outright.

That trailing half-point — the "hook" — matters enormously. A −6.5 can't push (tie); a −6 can. If the Chiefs win by exactly 6, a −6 bet refunds your stake while a −6.5 bet loses outright. Half-points aren't decoration. They quietly decide a huge number of tickets, and understanding them is step one to betting spreads well.

Covering, and the price you pay

Most spreads are priced at −110 on both sides. That means a $110 bet wins $100 — the extra $10 is the sportsbook's juice. Because of that tax, to beat the spread over the long run you have to win about 52.4% of your bets just to break even. That number should live rent-free in your head, because it's the bar every spread bettor is actually clearing (or failing to clear). Hitting 55% isn't a rounding error away from 52% — it's the difference between a profitable season and a losing one.

Key numbers: why 3 and 7 rule the NFL

In football, points come in chunks — field goals (3) and touchdowns (7). So games land on certain final margins far more often than others. The single most common winning margin in the NFL is 3, followed by 7. That's why moving a line from −2.5 to −3.5 is a much bigger deal than moving from −5.5 to −6.5: you're crossing a key number where a large share of games actually finish. Sharp bettors will happily pay a little extra juice to get onto the right side of the 3 (say, buying +3.5 instead of +2.5), and they'll pass on prices that sit on the wrong side of it. If you take one habit from this article, make it "respect the 3 and the 7."

Spreads in basketball

Basketball spreads behave differently. Scoring is continuous and high, so there are no dominant key numbers the way there are in football — a final margin of 7 isn't meaningfully more common than 6 or 8. That makes individual half-points less pivotal, but it makes other factors bigger. Pace matters (fast teams create more possessions and bigger swings), and so does garbage time: a team up 12 with two minutes left might empty the bench or stop fouling, and that alone can flip a −9.5. Late-game coaching decisions decide more NBA covers than most bettors realize.

Why the line moves

A spread isn't fixed. It opens at the book's number and then moves as money comes in and as news breaks. Two things push it: sharp money (a big, informed bet can move a line instantly) and public money (lots of small bets on a popular team). When a line moves against the side most tickets are on — say 70% of bets are on the favorite but the line drops from −7 to −6 — that "reverse line movement" is a tell that sharp money is on the other side. You don't have to chase it, but you should notice it.

Always shop the number

Two books might hang the same game at −6.5 and −7. If you're on the favorite, −6.5 is strictly better; if you're on the dog, +7 is. Over a full season those half-points are the difference between a winning and a losing record — they're free equity you leave on the table by betting the first line you see. Keep two or three books and take the best available number every single time. It is the lowest-effort edge in all of betting.

The bottom line

The point spread turns any game into a roughly even-money proposition by handicapping the favorite. Read the hook, respect the −110 math and the 52.4% break-even, know your key numbers in football, understand what moves a line, and shop every price. Do those things consistently and you're already ahead of the vast majority of people clicking bets on a Sunday afternoon.