Updated November 5, 2026
21+ only. Sports betting is not legal in every state. Check your local laws. Problem gambling? Call 1-800-GAMBLER.
Anyone who reads NFL point spreads for long hears that 3 and 7 are "key numbers." The idea is simple: NFL games end with certain winning margins far more often than others, so a half point on either side of those margins matters more than a half point anywhere else. This guide explains what a key number is, why 3 and 7 come up so often, how often games actually land on them, and what that means for spreads, pushes and teasers. The frequencies below are computed from a public game-results dataset, and every spread in the examples is hypothetical.
What a Key Number Is in NFL Betting
A key number is a final margin of victory that shows up often enough to change how a point spread should be read. If you are new to spreads, start with our guide to what against the spread means, which covers favorites, underdogs, covers and pushes. Key numbers build on that: they explain why a move from 2.5 to 3.5 is a bigger change than a move from 5.5 to 6.5, even though both are one point.
Why 3 and 7 Show Up So Often
The answer is in the scoring rules. Under Rule 11 of the 2026 NFL rulebook, a touchdown is worth 6 points, a field goal 3, a safety 2, and a try after a touchdown 1 point (by kick) or 2 points (by a touchdown play). That means:
- 3 is one field goal.
- 7 is a touchdown plus a successful one-point try.
- 6, 10 and 14 are also natural combinations: a touchdown with a missed or failed try, a touchdown plus a field goal, and two touchdowns with kicks.
Because points come in these chunks, final margins cluster on the numbers those chunks produce.
How Often NFL Games Land on 3 and 7
We counted final margins for every completed NFL game from the 2015 through 2025 seasons, regular season and playoffs, using the public nflverse game-results dataset. That is 3,028 games. The most common winning margins were:
- 3 points: 449 games, or 14.8%
- 7 points: 263 games, or 8.7%
- 6 points: 210 games, or 6.9%
- 14 points: 156 games, or 5.2%
- 10 points: 144 games, or 4.8%
- 4 points: 140 games, or 4.6%
Together, 3 and 7 accounted for 23.5% of all games in that span, close to one in four. No other margin reached 7%. Ten of the 3,028 games ended in a tie.
Why the Half Point Around 3 Matters Most
The margins above count either team winning. For spreads, what matters is the favorite's margin. In the same dataset, using its pregame spread to identify the favorite, the favorite won by exactly 3 in 261 of 3,024 games with a favorite, or 8.6%. The favorite won by exactly 4 in 81 games, or 2.7%.
Here is what that means with a hypothetical spread. Say a team is favored by 2.5 points. If the spread moves to 3.5, the favorite now has to win by 4 or more instead of 3 or more, so every exact 3-point win flips from a cover to a non-cover. In this dataset, that is about 8.6% of games. A similar one-point move from 3.5 to 4.5 only changes the result when the favorite wins by exactly 4, about 2.7% of games. Same one point, roughly a third of the impact.
The same logic applies at 7, at a smaller scale: the favorite won by exactly 7 in 166 games, or 5.5%.
Key Numbers and Pushes
When a spread sits on a whole number, a game that lands exactly on it is a push. With a hypothetical spread of 3, a 3-point win by the favorite is neither a win nor a loss for a spread bet, and how a push is settled depends on the sportsbook's house rules. Because 3 and 7 are the most common margins, whole-number spreads of 3 and 7 are where pushes come up most. Half-point spreads such as 3.5 cannot push at all.
Key Numbers and Teasers
Key numbers are also why teasers are usually discussed in terms of 3 and 7. A teaser moves each spread by a set number of points, and a move that crosses both 3 and 7 changes more outcomes than a move that crosses neither. Our explainer on how a teaser bet works covers the mechanics and the break-even math, and our guide to implied probability shows how to turn any price into the win rate it requires. Knowing the frequencies does not make any bet a good one; it only tells you which numbers carry the most weight.
Limits of These Numbers
These percentages describe past games, 2015 through 2025. Rules, kicking accuracy and coaching decisions change over time, and a single season can look different from an 11-season average. The figures are a way to understand spreads, not a forecast for any game.
A Note on Our Own Research Model
The Sports Hangover publishes model-based research, not picks. Our research model's backtest went 48.7% against closing lines from 2021 to 2025. That's not a proven edge. Nothing on this page is a recommendation to place a bet.
Where Sports Betting Is Legal and Where to Get Help
The American Gaming Association's state-by-state map tracks where sports betting is legal. If betting stops being fun, the National Council on Problem Gambling help page lists treatment and support options, and the 1-800-GAMBLER helpline site offers confidential help.
Key Numbers in Football: Frequently Asked Questions
What are the key numbers in NFL betting?
The most important are 3 and 7. From 2015 through 2025, 14.8% of NFL games were decided by exactly 3 points and 8.7% by exactly 7, per the nflverse game-results dataset. 6, 10 and 14 are secondary key numbers.
Why is 3 the most common margin in the NFL?
A field goal is worth 3 points under the NFL rulebook, so a game separated by one field goal ends with a 3-point margin. From 2015 through 2025, 14.8% of games ended that way, more than any other margin.
Can a half-point spread push?
No. With a spread such as 3.5, the final margin can never land exactly on the number, so every bet is either a cover or a non-cover.
21+ only. Sports betting is not legal in every state. Check your local laws. Problem gambling? Call 1-800-GAMBLER.
