NFL Point Spreads & Key Numbers

The point spread is the heart of NFL betting. It's how sportsbooks level the playing field between mismatched teams, and understanding it — especially the role of key numbers — is the single most important skill for a football bettor. This guide is a companion to our full NFL betting guide.

How the point spread works

Every NFL game has a favorite and an underdog. The favorite is assigned a handicap — the spread — that it must overcome to "cover." If the Chiefs are -6.5 against the Broncos, Kansas City must win by 7 or more for a spread bet on them to cash. Denver at +6.5 covers by losing by six or fewer, or by winning outright. When you bet the spread, the final score's margin is all that matters, not who technically won.

A spread ending in .5 — the "hook" — removes the possibility of a tie. When a spread lands on a whole number (say, -3) and the game's margin equals it exactly, the bet is a push and your stake is refunded.

Why key numbers rule the NFL

Because NFL games are scored in 3s (field goals) and 7s (touchdowns plus the extra point), margins of victory cluster around specific numbers far more than in other sports. The two most important are 3 and 7 — a huge share of NFL games are decided by exactly those margins. Numbers 6, 10, and 14 matter too, but nothing rivals 3 and 7.

This is why half-points around key numbers are so valuable. Moving from +2.5 to +3 to +3.5 crosses the single most common margin in football. A spread of +3 wins outright when the underdog loses by fewer than three and pushes on a field goal, while +3.5 wins in that same field-goal scenario — a meaningful difference that sportsbooks price carefully.

Buying and selling points

Many sportsbooks let you "buy" half-points to move a spread in your favor, at the cost of worse odds. Buying off the key number 3 — say, moving a favorite from -3 to -2.5 — is the most sought-after and therefore the most expensive, because you're crossing the game's most common margin. Whether buying points is worth it depends on how often that specific number actually decides games; around 3 and 7, it often is, but the sportsbook prices that in.

Betting against the spread (ATS)

A team's ATS record tracks how it performs relative to the spread, not its straight-up wins and losses. A dominant team that everyone bets on may have a losing ATS record if the market consistently overprices it, while a mediocre team can be profitable ATS if it's routinely underrated. Sharp spread bettors care far more about ATS value than about which team is simply "better."

Practical tips

• Line-shop around key numbers. Getting +3 at one book instead of +2.5 at another can flip a season's worth of close bets.
• Watch line movement. When a spread moves from -3 to -4, the market is telling you something — sometimes about injuries, sometimes about where the money is going.
• Home-field and rest matter. They're already baked into the number, so the question is always whether the market has them priced correctly.