NFL Bet Line
The math here is simple, and you should know it cold before you place another bet. American odds are the default format at every major US sportsbook, but international books and plenty of odds-comparison tools display lines in decimal format. If you can't translate between the two instantly, you're working with half the picture.
How do you convert -110 American odds to decimal?
-110 American odds convert to approximately 1.91 in decimal format. Here's the formula: divide 100 by the absolute value of the American odds, add 1.
- Take the American line: -110
- Divide 100 by 110: 0.909…
- Add 1: 1.909, rounded to 1.91
That decimal figure — 1.91 — represents your total return per dollar wagered, profit included. Bet $100, collect $191 if you win. The $91 is your profit; the other $100 is your stake back. Notice that 1.91 is less than 2.00. That gap is the sportsbook's cut, and it's not trivial.
Why does -110 show up on both sides of an NFL spread?
The standard point spread price on both sides of an NFL line is -110 — you wager $110 to win $100, and that extra $10 is the sportsbook's vig. When both sides sit at -110, the book's implied combined percentage is approximately 104.8%, which means a theoretical hold of roughly 4.8% for the house. Every dollar funneled through that market, the book keeps about a nickel in the long run. That's what What Is Vig in NFL Betting and How Much Does the Sportsbook Take? breaks down in full detail.
What does the decimal format tell you that American odds don't?
Decimal odds let you compare prices at a glance across books — especially European-facing platforms that never show American format. A line at 1.91 versus 1.93 is immediately legible; the American equivalents (-110 vs. roughly -108) require more mental arithmetic under time pressure. If you're shopping lines, decimal format is the cleaner tool. For the full picture on reading NFL odds in every format, see How to Read NFL Betting Odds — American, Decimal, and What Each Number Costs You.
Does this conversion change depending on the bet type?
The formula is identical regardless of whether you're converting a spread price, a moneyline, or a total. The bet type changes the context, not the arithmetic. A -200 moneyline favorite converts to 1.50 decimal: 100 ÷ 200 = 0.50, plus 1. A +175 underdog converts to 2.75: 175 ÷ 100 = 1.75, plus 1. You can see why underdogs in decimal format always show a number above 2.00 — any plus-money line returns more than double your stake if it hits. For more on when moneyline pricing beats the spread, read What Is a Moneyline in NFL Betting and When Does It Beat the Spread?, and for spread-specific strategy, check How the NFL Point Spread Works — and How to Bet It.
Quick conversion reference
| American Odds | Decimal Odds | Profit on $100 stake |
|---|---|---|
| -110 | 1.91 | $90.91 |
| -120 | 1.83 | $83.33 |
| -200 | 1.50 | $50.00 |
| +100 | 2.00 | $100.00 |
| +150 | 2.50 | $150.00 |
| +200 | 3.00 | $200.00 |
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