What does it mean to cover the spread?

Covering the spread means the team you bet on won against the point spread. If you bet Chiefs -3.5, the Chiefs must win by 4 or more points to cover. If you bet Bills +3.5, the Bills must either win outright or lose by 3 or fewer points to cover.

Why do point spreads move?

Spreads move for several reasons: heavy betting on one side (the book adjusts to balance action), injury news, weather changes, or sharp bettor activity. Tracking line movement can provide valuable information about where the smart money is going.

What are key numbers in NFL betting?

Key numbers are the most frequent margins of victory. In NFL: 3 (occurs ~15% of games), 7 (~9%), 6, 10, 14, 1, 4. Games are often decided by a field goal (3) or touchdown (7). Spreads that cross these numbers have significantly different win probabilities, which is why buying points through 3 or 7 can be valuable.

Should I buy points on a spread?

Buying points is worth it when the spread crosses a key number, especially 3 and 7 in NFL. Moving from -3 to -2.5 is valuable because many games end with a 3-point margin. However, buying through non-key numbers is usually a bad deal because the vig increase outweighs the small probability gain.

What is a pick'em in spread betting?

A pick'em (PK) is when neither team is favored, so the spread is 0. You simply pick the winner. Both sides are typically priced at -110. Pick'em games are essentially moneyline bets at standard juice.

Point Spread Explained: How Spread Betting Works

A comprehensive guide to point spread betting, including how spreads are set, why lines move, key numbers, and when to buy points.

What is a Point Spread?

A point spread is a number set by oddsmakers that represents the expected margin of victory. It handicaps the favorite and gives the underdog a head start, creating a roughly equal betting market on both sides.

Favorite: Chiefs -7.5 (-110)

Must win by 8+ points to cover. Subtract 7.5 from their final score - if still ahead, bet wins.

Underdog: Bills +7.5 (-110)

Can lose by up to 7 points and still cover. Add 7.5 to their final score - if ahead, bet wins.

Why Lines Move

Point spreads are not static. They change from their opening line to the closing line based on:

Betting volume: Heavy action on one side causes the book to adjust to balance their liability.
Sharp action: When professional bettors bet a side, books respect their opinion and move the line quickly.
Injury reports: A star player being ruled out can move a spread by 1-3 points.
Weather: Wind and precipitation in outdoor games can impact totals and spreads.

Key Numbers by Sport

Sport	Key Numbers	Why
NFL	3, 7, 6, 10, 14	Field goals (3), touchdowns (7)
NBA	Less pronounced	Higher scoring reduces key number impact
MLB	1, 2 (run line)	Standard run line is 1.5
NHL	1, 2 (puck line)	Standard puck line is 1.5

Buying Points

Many sportsbooks let you "buy" points by accepting worse odds to move the spread in your favor. The standard cost is -10 cents per half point (e.g., moving from -110 to -120 for a half-point).

When Buying Points Makes Sense

Crossing through 3 in NFL (e.g., -3 to -2.5 or +2.5 to +3.5)
Crossing through 7 in NFL (e.g., -7 to -6.5 or +6.5 to +7.5)
Moving off a hook that could cause a push

Not worth it: Buying through non-key numbers rarely provides enough probability improvement to offset the extra juice.

Try our Spread & Moneyline Calculator to see break-even rates and payouts for any spread.