An NFL point spread handicaps the favorite by a set number of points. Three and seven are called key numbers because NFL margins cluster on them: across 1,615 regular-season games from 2020 to 2025, 14.61% finished exactly three points apart and 7.68% exactly seven, together 22.29% of all games.
Current numbers are on the NFL odds board.
What an NFL point spread is
A point spread handicaps the favorite by a number of points. The favorite is listed with a minus sign and must win by more than that number; the underdog is listed with a plus sign and can lose by less than it, or win outright.
| Line | Final score | Result |
|---|---|---|
| Chiefs −5.5 | Chiefs win 27-20 (margin 7) | Chiefs side wins |
| Chiefs −5.5 | Chiefs win 23-20 (margin 3) | Broncos side wins |
| Chiefs −3 | Chiefs win 23-20 (margin 3) | Push — stake returned |
| Broncos +5.5 | Broncos lose 20-24 (margin 4) | Broncos side wins |
Why 3 and 7 are called key numbers
NFL scoring is built from field goals and touchdowns, so final margins pile up on a few values instead of spreading evenly. Across 1,615 regular-season games from 2020 to 2025, the single most common margin was 3 points.
Seven is the next spike, at 7.68%. Together, 3 and 7 account for 22.29% of all regular-season results — roughly one game in five landing on just two of the dozens of possible margins.
The full margin distribution
| Final margin | Games | Share |
|---|---|---|
| 0 | 5 | 0.31% |
| 1 | 78 | 4.83% |
| 2 | 82 | 5.08% |
| 3 | 236 | 14.61% |
| 4 | 82 | 5.08% |
| 5 | 73 | 4.52% |
| 6 | 110 | 6.81% |
| 7 | 124 | 7.68% |
| 8 | 73 | 4.52% |
| 9 | 30 | 1.86% |
| 10 | 81 | 5.02% |
| 11 | 29 | 1.80% |
| 12 | 31 | 1.92% |
| 13 | 29 | 1.80% |
| 14 | 74 | 4.58% |
| 15 or more | 478 | 29.60% |
NFL regular season, 2020–2025, n = 1,615. Margin 0 is a tie. Source: our own results archive; the query is committed as repo_check/seo/f31_lake_stats.py.
The shape is what matters. Three is not merely common, it is discontinuously common: it occurs 2.9 times as often as 2 (5.08%) and 2.9 times as often as 4 (5.08%), its immediate neighbours.
Seven is a genuine but much smaller spike. At 7.68% it sits only a little above 6 (6.81%) and clearly above 8 (4.52%). Six and ten (5.02%) are the secondary numbers the same scoring arithmetic produces, and the table shows them plainly rather than rounding the story down to two figures.
What that means for a half point
Because so much probability sits exactly on 3, the difference between −3 and −3.5 is much larger than the difference between −5 and −5.5. Moving a favorite from −3 to −3.5 gives away the 14.61% of games that land exactly on 3; moving from −5 to −5.5 gives away the 4.52% that land on 5.
This is also why a line sitting on 3 tends to hold there while the price beside it moves instead. A book would rather charge −120 on −3 than move to −3.5.
Is it stable season to season?
Yes, within the noise you would expect from about 270 games a year.
| Season | Games | Margin 3 | Margin 7 |
|---|---|---|---|
| 2020 | 256 | 14.45% | 7.42% |
| 2021 | 272 | 13.97% | 6.62% |
| 2022 | 271 | 16.61% | 7.01% |
| 2023 | 272 | 13.97% | 8.09% |
| 2024 | 272 | 13.60% | 7.35% |
| 2025 | 272 | 15.07% | 9.56% |
Regular season only. Single seasons carry visible sampling noise; the six-season pooled figures above are the ones worth quoting.
Playoff games behave similarly on this measure: across 78 playoff games in the same window, 26.92% finished with a 3-point margin and 8.97% with a 7-point margin. The playoff sample is small enough that those two figures should be read as indicative rather than precise.
How this was measured
- Source: our results archive (nflverse final scores) for 2020–2025, regular season, n = 1,615 games. Playoffs counted separately, n = 78.
- Margin = the absolute difference between the two final scores. No odds are involved in this measurement at all; it is a distribution of results.
- Produced by
repo_check/seo/f31_lake_stats.pyagainst a read-only database session. Re-running the script reproduces every figure on this page. - Odds archive current to 2026-07-28. Figures refresh when the source scripts are re-run.
Next steps
Frequently asked questions
What are the key numbers in NFL betting?
Three and seven. In 1,615 NFL regular-season games from 2020 to 2025, 14.61% ended with a 3-point margin and 7.68% with a 7-point margin.
Why does a line stop at −3 instead of moving to −3.5?
Because 14.61% of games land exactly on 3, crossing that number changes the bet far more than crossing 5 or 8. Books typically adjust the price instead.
What happens if the margin lands exactly on the spread?
The bet pushes and the stake is returned. Only whole-number spreads can push; a half point removes the possibility.
Do playoff games follow the same pattern?
Broadly yes. In 78 playoff games over the same seasons, 26.92% landed on 3 and 8.97% on 7, though that sample is small.
Related: NFL odds board · how to read NFL odds · moneyline vs spread · betting glossary
Every figure on this page is a historical measurement of what already happened, produced by a committed, re-runnable script over our own odds archive. Past frequencies are not forecasts and are not betting advice: Nebula Insights publishes no picks, no selections and no recommended wagers. 18+ only.