- Maths reviewed by Josh Miller
- Tested by Diana Westfield
American to decimal odds depends on the sign. A plus price is the profit on a 100 stake, so +150 means 150 profit and 250 back: 2.50 in decimal. A minus price is what you stake to win 100, so −200 means betting 200 to get 300 back: 1.50. The free CasinoCalcs converter takes either and does the rest.
American to decimal odds: the two formulas
Plus: decimal = 1 + American ÷ 100 (+175 → 2.75) Minus: decimal = 1 + 100 ÷ |American| (−125 → 1.80)
Both give the total return per 1 staked. That’s all decimal odds are.
The common trap is −110. It looks like it should be close to 2, and it is: 1.91. You win C$90.91 on a C$100 bet. When both sides of a game are −110, those 1.91s add up to a 104.8% book, which is the margin you’re paying. Our vig calculator strips that out.
American to decimal odds chart
| American | Decimal | C$100 returns |
|---|---|---|
| −1000 | 1.10 | C$110.00 |
| −500 | 1.20 | C$120.00 |
| −400 | 1.25 | C$125.00 |
| −300 | 1.33 | C$133.33 |
| −250 | 1.40 | C$140.00 |
| −200 | 1.50 | C$150.00 |
| −175 | 1.57 | C$157.14 |
| −150 | 1.67 | C$166.67 |
| −125 | 1.80 | C$180.00 |
| −110 | 1.91 | C$190.91 |
| +100 | 2.00 | C$200.00 |
| +110 | 2.10 | C$210.00 |
| +125 | 2.25 | C$225.00 |
| +150 | 2.50 | C$250.00 |
| +175 | 2.75 | C$275.00 |
| +200 | 3.00 | C$300.00 |
| +250 | 3.50 | C$350.00 |
| +300 | 4.00 | C$400.00 |
| +400 | 5.00 | C$500.00 |
| +500 | 6.00 | C$600.00 |
| +750 | 8.50 | C$850.00 |
| +1000 | 11.00 | C$1100.00 |
Why decimals help with American lines
Parlays. Multiply the decimals and you have the parlay price: −110, −110 and +150 is 1.91 × 1.91 × 2.50 = 9.12, so C$10 returns about C$91. Doing that with plus and minus numbers means converting anyway. The parlay calculator takes American odds directly if you’d rather not.
For the reverse, there’s a decimal to American converter. The moneyline calculator is quicker if all you want is the payout on one line.
Short prices still lose. BeGambleAware.org and the free helplines listed there are worth knowing about.