NFL key numbers are the final winning margins that come up far more often than the numbers either side of them, and the two that matter most are 3 and 7. Of the 1,359 regular-season games completed in the 2021 to 2025 seasons, 199 (14.6%) were decided by exactly 3 points and 105 (7.7%) by exactly 7, and no other margin reached 7% of games.
That bunching makes a half point next to 3 or 7 worth far more than one anywhere else, so it shapes the price of NFL lines, alternate lines, middles and teasers. NFL line betting explains how a line settles, and the US sports betting guide puts the NFL beside the other US leagues.
How NFL scoring creates 3 and 7
Rule 11 of the NFL's 2026 Official Playing Rules values a touchdown at 6 points, a field goal at 3 and a safety at 2. A touchdown is followed by a try: 1 point for a kick from 15 yards out, or 2 points for a run or pass from the 2-yard line. So the scores that settle close games are worth 3 and 7, and the common margins combine them:
| Margin | Ways a game can finish that far apart |
|---|---|
| 3 | One field goal |
| 7 | A touchdown with a kicked try |
| 6 | A touchdown with no try or a failed one, or two field goals |
| 10 | A touchdown with a kicked try, plus a field goal |
| 14 | Two touchdowns with kicked tries |
| 17 | Two touchdowns with kicked tries, plus a field goal |
In a close game the last score sets the margin. A team behind by 1 to 3 points late can level or win with a field goal, while one behind by 4 to 8 needs a touchdown. Overtime often ends 3 points apart: 47 of the 83 overtime games from 2021 to 2025 did.
NFL winning margins, 2021 to 2025
Counted from the NFL's published final scores for every regular-season game completed in the 2021 to 2025 seasons, the first five seasons of the 17-game schedule. That is 1,359 games, because one of the 1,360 scheduled, a Week 17 game in 2022, was cancelled and never resumed. The margin is the winner's score minus the loser's, and a tie counts as 0.
| Margin (points) | Games | Share |
|---|---|---|
| 0 (tie) | 4 | 0.3% |
| 1 | 67 | 4.9% |
| 2 | 72 | 5.3% |
| 3 | 199 | 14.6% |
| 4 | 69 | 5.1% |
| 5 | 59 | 4.3% |
| 6 | 93 | 6.8% |
| 7 | 105 | 7.7% |
| 8 | 59 | 4.3% |
| 9 | 25 | 1.8% |
| 10 | 65 | 4.8% |
| 11 | 21 | 1.5% |
| 12 | 29 | 2.1% |
| 13 | 28 | 2.1% |
| 14 | 58 | 4.3% |
| 15 | 25 | 1.8% |
| 16 | 26 | 1.9% |
| 17 | 53 | 3.9% |
| 18 or more | 302 | 22.2% |
Shares are rounded to one decimal place. A 3-point margin is almost twice as common as 7 and nearly three times as common as its neighbours 2 and 4. A second tier of 6, 10, 14 and 17 sits above the margins around it, while 9, 11 and 15 are rare, under 2% each.
The pattern holds over a longer run: across the 2,639 games of 2016 to 2025, 3 decided 381 (14.4%) and 7 decided 225 (8.5%). To check a season, subtract each loser's score from the winner's on the NFL's results pages and tally the margins.
These are shares of all games, both teams together. One game's chance of finishing exactly 3 apart depends on how close it is expected to be, and a game priced around a field goal should land there more often than a mismatch. The table alone cannot say by how much.
Why key numbers move when the rules change
Key numbers come from the rules, so a rule change can move them, and the shares also swing from season to season. A 7-point margin decided 120 of 1,280 regular-season games in 2016 to 2020 (9.4%) but 105 of 1,359 in 2021 to 2025 (7.7%), while 3 held steady at 14.2% and 14.6%.
That fall is smaller than the swing between single seasons before it: 16 of 256 games in 2017 and 32 of 256 in 2019. Measure on recent seasons.
Until 2025 a touchdown on the first possession of regular-season overtime ended the game, with no try. A change approved on 1 April 2025 gave both teams the chance to possess the ball, unless the side kicking off scores a safety on the first possession or the 10 minutes run out first. Overtime margins moved with it:
| Regular-season overtime | Games | By 3 | By 6 | By 1 | By 7 | Tied |
|---|---|---|---|---|---|---|
| 2021 to 2024 | 69 | 40 | 26 | 0 | 0 | 3 |
| 2025 | 14 | 7 | 2 | 3 | 1 | 1 |
Fourteen games is a small sample, but 2025 brought three 1-point wins where 2021 to 2024 had none.
What a half point around 3 and 7 is worth
A half point is worth the chance that the result lands exactly on the number it moves across. Take a game priced at -3, with a fair price of $2.00 on -3.
Give the favourite half the all-games share at each margin, rounded to one decimal place: 2.6% to win by exactly 2, 7.3% by 3, 2.5% by 4, 2.2% by 5, 3.4% by 6 and 3.9% by 7. The favourite then covers -3.5 with a chance of (100% - 7.3%) / 2 = 46.35%, and each one-point move adds or removes one margin:
| Line moved one point | Margin it adds | Chance the favourite covers (model) | Fair price, before and after | Price can drop by up to |
|---|---|---|---|---|
| -7.5 to -6.5 | 7 | 34.35% to 38.25% | $2.91 to $2.61 | 10.2% |
| -6.5 to -5.5 | 6 | 38.25% to 41.65% | $2.61 to $2.40 | 8.2% |
| -5.5 to -4.5 | 5 | 41.65% to 43.85% | $2.40 to $2.28 | 5.0% |
| -4.5 to -3.5 | 4 | 43.85% to 46.35% | $2.28 to $2.16 | 5.4% |
| -3.5 to -2.5 | 3 | 46.35% to 53.65% | $2.16 to $1.86 | 13.6% |
| -2.5 to -1.5 | 2 | 53.65% to 56.25% | $1.86 to $1.78 | 4.6% |
Fair price = 1 / chance, and the most a price can drop for the same expected value is 1 - chance before / chance after: across 3, that is 1 - 46.35 / 53.65 = 13.6% of the price. So the point across 3 is worth more than twice one across 4 or 5.
Example: Illustrative prices. Your bookmaker offers the favourite at -3.5 for $2.05, so in the model -2.5 matches it only at 2.05 x 46.35 / 53.65 = $1.77 or better. At $1.70 the extra point costs more than it adds: expected value per $1 is 0.4635 x 2.05 - 1 = -5.0c at -3.5, against 0.5365 x 1.70 - 1 = -8.8c at -2.5.
Each point is two half points. From -3.5 to -3, a 3-point win turns from a loss into a push, worth up to 1 - 2.00 x 0.4635 = 7.3% of the fair price. From -3 to -2.5, the push turns into a win, worth up to 1 - 1 / (2.00 x 0.5365) = 6.8% more.
At the example's $2.05, -3 matches -3.5 only at 2.05 - 0.073 / 0.4635 = $1.89 or better. Pick your own line covers how bookmakers step alternate prices away from the main line.
Risk: Betting involves risk. The model's chances are estimates from past seasons, and there is no guarantee of profit from buying half points. See responsible gambling for limits and support.
Key numbers in NFL totals
Totals have key numbers too, but weaker ones. A total adds two scores that are each built from 3s and 7s, so common totals are common sums: 44 is 24 + 20 or 27 + 17, and 51 is 27 + 24 or 31 + 20. The most frequent totals in the 2021 to 2025 regular seasons, with one gap among them:
| Total points | Games | Share |
|---|---|---|
| 37 | 54 | 4.0% |
| 51 | 54 | 4.0% |
| 44 | 53 | 3.9% |
| 43 | 51 | 3.8% |
| 41 | 48 | 3.5% |
| 47 | 46 | 3.4% |
| 42 | 23 | 1.7% |
The top share is 4.0%, against 14.6% for a 3-point margin. Moving from over 44.5 to over 43.5 adds totals of exactly 44, 3.9% of games.
If over 44.5 is a 48% chance (illustrative), over 43.5 is about 48% + 3.9% = 51.9%. Its price can then be up to 1 - 48 / 51.9 = 7.5% lower for the same value, while the same move across 42 adds only 1.7 percentage points. Over/under betting covers what else moves a total.
Middles and teasers around 3 and 7
A middle backs both sides of one game at different lines, so both bets win if the result lands in the gap. Team A -2.5 with one bookmaker and Team B +3.5 with another both win only if Team A wins by exactly 3. Start with what a miss costs, at illustrative prices of $1.83 a side and $100 on each:
| Result | Team A -2.5 at $1.83 | Team B +3.5 at $1.83 | Net |
|---|---|---|---|
| Team A wins by 4 or more | Wins $83 | Loses $100 | -$17 |
| Team A wins by 1 or 2, a tie, or Team B wins | Loses $100 | Wins $83 | -$17 |
| Team A wins by exactly 3 | Wins $83 | Wins $83 | +$166 |
Break-even hit rate = loss on a miss / (gain on a hit + loss on a miss) = 17 / (166 + 17) = 9.3%. In the model, which gives the favourite a 7.3% chance of winning by exactly 3, the middle loses 0.073 x 166 - 0.927 x 17 = -$3.64 for every $200 staked, on average. A game priced around a field goal should beat 7.3%, but the results table cannot say whether it reaches 9.3%.
A middle across 7, at -6.5 and +7.5, has less to aim at: half the all-games share of 7-point results is 3.9%. Middle betting in Australia covers the full maths.
A teaser is a multi in which every leg's line moves the same number of points your way for a lower price: in a 6-point NFL teaser a -7.5 favourite becomes -1.5, crossing both 7 and 3. Its price is set by the number of legs and points, not by multiplying leg prices, and availability varies by bookmaker.
Risk: Betting involves risk. A middle loses on most results by design and is not an arbitrage, an arbitrage or a middle only works if every bet is accepted at the price shown, and a teaser loses if any leg does. Bookmakers can limit your stakes, void bets or close an account under their own terms, and that risk is yours. See responsible gambling for limits and support.
Key number mistakes and what they cost
| Mistake | What it costs | The fix |
|---|---|---|
| Treating the 14.6% as one side's chance of a 3-point win | It counts both teams, so it is twice the model's 7.3%, and the $1.83 middle would look worth 0.146 x 166 - 0.854 x 17 = +$9.72 per $200 instead of -$3.64 | Halve it, then adjust for how close the game should be |
| Paying the same for every point moved | Giving up 13% of the price to move from -5.5 to -4.5 throws away about 8% of it, because that one-point move is worth 5.0% | Match what you give up to the share of games on that margin |
Risk: Betting involves risk. Pricing a line move by past margins can stop you overpaying, but those margins are past averages and the bet can still lose. See responsible gambling for limits and support.
Finding half points and middles across bookmakers
One game can be -3 at one bookmaker and -3.5 at another, or 43.5 against 44.5 on the total, and those are different bets. B337's Terminal carries prices from 40+ bookmakers across racing and sports. On its sports board, each bookmaker's line and total prices, where offered, sit side by side, with the best available price on each selection picked out.
B337's middles screener looks for two lines on the same total or handicap with a gap between them. Its middle percentage is the profit or loss per $100 staked when the middle misses; it is not a probability, and the screener does not say how often a gap lands. Screener rows come with Terminal Pro, Full Automation or the separate Screeners plan, and you place every leg yourself.
For free and confidential support call 1800 858 858 or visit gamblinghelponline.org.au.
Risk: Betting involves risk. Prices are read on a repeating cycle and can trail the bookmaker's own, a screener lists candidates rather than results, and a middle that misses loses money. See responsible gambling for limits and support.