Bettors learning the fundamentals of spread betting — the most-bet market type in NFL and NBA.
Definition
A point spread bet is a wager on the margin of victory. The sportsbook sets a spread (say -3.5 for the favorite); the favorite must win by MORE than the spread to cover, or the underdog wins the bet.
Reading Chiefs -3.5 (-110) vs Broncos +3.5 (-110)
Chiefs -3.5 means the Chiefs need to win by 4+ points to cover. Broncos +3.5 means Broncos either win outright OR lose by 3 or fewer to cover. Both sides priced at -110: risk $110 to win $100. That's the standard 'vig' or 'juice' — the sportsbook's built-in edge.
Why this matters
Understanding this concept is foundational — bettors who internalize the underlying math consistently outperform bettors who don't, over meaningful sample sizes.
When to use spreads
Spreads are best when: (1) you have a specific margin-of-victory view, (2) the moneyline on the favorite is too juicy to bet, (3) you want tighter-priced odds than moneylines offer.
Nfl key numbers
NFL games are decided by exactly 3 points more often than any other margin (~15% of games) and by exactly 7 points second-most (~9%). Moving a spread across a key number (from -3 to -3.5, for example) materially changes the bet's expected value. Sharp bettors line-shop specifically to get across these numbers.
Frequently asked questions
How is a Point Spread Bet different from related concepts?
The concept above is one of several closely-related ideas in betting math. Understanding the distinctions between them — and when each applies — is a foundational skill for any bettor evaluating their own play or an operator's pricing.
Can I calculate this myself?
Yes. All the math shown in the worked example is straightforward arithmetic once you know the formula. Most bettors don't need to calculate it manually for every bet — spreadsheets or dedicated tools handle the volume — but understanding the mechanics helps you spot when a price looks off.
Where should a beginner start?
Read the definition and the worked example, then apply the concept to your last 10 bets to see how it changes your view of your results. Concept comprehension deepens fastest when you apply it to real historical data.
Do offshore and regulated books treat this differently?
The underlying math is the same across all books. What differs are the specific values — hold rates, rollover multipliers, edge margins — that appear in real markets. Our operator reviews document those differences.