In most sports, final margins spread out fairly evenly. In the NFL, they cluster on a handful of numbers because of how points are scored: field goals (3), touchdowns with an extra point (7) and combinations of the two. These key numbers shape almost every NFL betting decision.
The most common NFL margins
Rough frequencies of final margins across recent seasons (exact numbers vary year to year):
| Margin | Approx. share of games | Why |
|---|---|---|
| 3 | ~14% | Field goal |
| 7 | ~9% | Touchdown + PAT |
| 10 | ~5–6% | TD + FG |
| 6 | ~5–6% | Two FGs / missed PAT |
| 4 | ~4–5% | |
| 14 | ~4–5% | Two TDs |
| 1, 2 | ~3–4% each | |
| 17, 8, 13 | ~2–3% each |
The gap between 3 and nearly every other number is enormous.
Why it matters for spreads
- Moving off or onto 3 is huge. −2.5 and −3.5 are very different bets. Taking +3 instead of +2.5 adds roughly 7% in win/push probability shifted.
- 7 is second. −6.5 vs −7.5 is the next most important half-point.
- Lines tend to "stick" at 3 and 7; books move the price (−3 −120) before moving the number.
(Value of a half-point · Point spreads.)
Key numbers and moneylines
Converting spreads to moneylines also has jumps at key numbers. The fair moneyline for a −3 favorite is meaningfully shorter than for −2.5, while −4 and −4.5 are close together. Books whose moneylines do not reflect this create value. (Moneyline betting.)
Teasers
Six-point teasers that cross both 3 and 7 (favorites −7.5 to −8.5, underdogs +1.5 to +2.5) capture the most valuable margins. That is why those are the classic teaser spots. (Teaser betting.)
Middles
Middles that cover 3 or 7 are worth several times more than equally wide middles elsewhere. (NFL middles.)
Totals key numbers
NFL totals cluster less, but some combined scores are more common: 41, 43, 44, 47, 51 and 37 show up more often than their neighbors. These matter less than 3 and 7 on sides, but buying through them cheaply can be worthwhile. (Over/under betting.)
Changes over time
Rule changes have shifted the distribution. The longer extra-point attempt (2015) slightly reduced the dominance of 7 and increased margins like 6 and 8; more two-point attempts and higher scoring also nudge frequencies. Use recent seasons, and remember key-number frequencies depend on the spread itself: games expected to be close land on 3 more often.
Putting it together
Key numbers are one piece of a weekly process; the NFL betting guide covers the rest.
College football
College margins are much more spread out (more scoring, more mismatches, two-point conversions), so key numbers are weaker. 3 and 7 still matter, but less. (College football betting.)
Frequently asked questions
What are the key numbers in NFL betting?
3 and 7 are the most important, followed by 10, 6, 4 and 14.
Why is 3 a key number in football?
Because many close games are decided by a field goal, making a 3-point final margin the single most common result.
Do key numbers matter for NFL totals?
Somewhat. Totals like 41, 43, 44, 47 and 51 land more often than their neighbors, but the effect is much weaker than for spreads.