The point spread is the signature NFL betting market. It’s built to make an uneven matchup interesting to bet on both sides, and understanding exactly how it settles — and why certain numbers matter more than others — is one of the most useful things a newer NFL bettor can learn.
This guide walks through how spreads work, why the numbers 3 and 7 are treated differently from every other number on the board, and how that knowledge should actually change the way you bet.
This article is part of Danny.bet’s wider American Football Betting Guide hub, which covers NFL betting markets, terminology and strategy in more detail.
How a Point Spread Works
A sportsbook assigns a margin to level a mismatched game. If Team A is favoured by 6.5 points (-6.5), they must win by 7 points or more for a spread bet on them to pay out. Team B, at +6.5, “covers” by either winning outright or losing by 6 points or fewer.
The spread doesn’t predict the final score — it’s a number designed to split betting interest as evenly as possible between both sides, which is what allows the sportsbook to earn its margin regardless of the outcome.
Why 3 and 7 Are Different From Every Other Number
In most sports, margins of victory are spread fairly evenly across many possible values. American football is different, because of how it scores: a touchdown with the extra point is worth 7, a field goal is worth 3. That means a disproportionate number of NFL games are decided by exactly 3 points or exactly 7 points, compared with any other margin.
This single fact is why sportsbooks are especially careful when setting lines near those numbers, and why bettors who understand it can make better decisions about which side of a half-point to take.
A push happens when the final margin lands exactly on the spread, and the sportsbook refunds the stake instead of paying out a win or a loss. Whole-number spreads like -3 or -7 allow a push; half-point spreads like -3.5 or -6.5 remove that possibility entirely, which is why so many NFL lines are set on the half.
Worked Example: Crossing a Key Number
Say Team A opens as a 2.5-point favourite. During the week, money comes in on Team A and the line moves to -3.5 — a full point, but one that now sits on the other side of the key number 3.
| Final Margin | Result at -2.5 | Result at -3.5 |
|---|---|---|
| Team A wins by 2 | Loss | Loss |
| Team A wins by exactly 3 | Win | Loss |
| Team A wins by 4 | Win | Win |
Nothing changed about the two teams between those two lines — but a bettor who locked in -2.5 early in the week has a real advantage over one betting -3.5 later, specifically because a 3-point margin is so much more common in the NFL than in most other sports. This is a big part of why professional bettors pay close attention to line movement around key numbers rather than just the final price.
Other Numbers Worth Watching
3 and 7 are the two big ones, but they’re not the only margins that occur more often than others in the NFL:
- 10 — a touchdown plus a field goal, the third most common margin
- 4 — a field goal plus a safety, or two scores after a missed extra point
- 6 — a touchdown without the extra point, or two field goals
- 14 — two touchdowns, common in games that get out of hand in the second half
None of these carry as much weight as 3 and 7, but they’re part of the same underlying pattern: NFL margins cluster around the values that match how the sport actually scores.
Spreads vs Moneylines vs Totals
The spread is only one of the three core NFL betting markets. Where the spread asks “by how much,” the moneyline asks only “who wins,” and the total asks about combined scoring rather than the margin between the two teams. Many experienced bettors compare all three before deciding which one actually offers the best price relative to their own view of the game.
Common Spread-Betting Mistakes
- Treating every half-point move as equally important, regardless of where it sits on the number line
- Betting a big favourite at a large spread without considering whether that many points is realistic
- Ignoring which side of 3 or 7 a line has moved to during the week
- Assuming a spread reflects a prediction of the final score, rather than a risk-balancing tool
Putting Key Numbers Into Practice
You don’t need to memorise a full distribution of NFL margins to use this well. The practical takeaway is simple: treat a half-point move across 3 or 7 as more meaningful than the same half-point move elsewhere on the board, and when you have a choice of when to place a spread bet, moving to the more favourable side of a key number is often worth more than it looks.
Understanding key numbers helps you judge the value of a specific line — it doesn’t guarantee a winning bet. Keep it as one input alongside sound bankroll management and realistic expectations about variance over a season.
Frequently Asked Questions
Because a field goal (3 points) and a touchdown with the extra point (7 points) are the two most common scoring plays, a disproportionate number of NFL games are decided by exactly those margins.
If the spread is a whole number and the final margin matches it exactly, the bet is a “push” and the stake is refunded. Half-point spreads exist specifically to prevent this outcome.
It depends on the direction the line is moving relative to key numbers. If a line looks likely to cross 3 or 7 before kickoff, locking in the more favourable side earlier can be worth more than waiting for a marginally better price elsewhere.
