Betting Strategy Guide
Betting Odds Formats: American, Decimal and Fractional
Key takeaways
- American odds (+150, -200) are built around $100; decimal odds (2.50) show the total return per $1; fractional odds (3/2) show profit per unit staked.
- +150, 2.50 and 3/2 are the same price.
- US sportsbooks, Betcris Arizona included, use American odds.
The same price can be written three ways. US sportsbooks use American odds, most of the world uses decimal odds, and the UK and Ireland still use fractions. Knowing all three lets you compare any line you read.
American odds
American odds are built around $100. A minus number is what you risk to win $100 (-200: risk $200 to win $100); a plus number is what $100 wins (+150: $100 wins $150). Read our guide on how to read betting odds for the details.
Decimal odds
Decimal odds show the total return for every $1 staked, stake included. At 2.50 a $10 bet returns $25: $15 profit plus your $10. Anything below 2.00 is a favorite; anything above is an underdog.
Fractional odds
Fractional odds show profit relative to the stake. At 3/2 you win $3 for every $2 staked, so $10 wins $15. At 1/2 you win $1 for every $2, the same as -200.
Conversion table
| American | Decimal | Fractional | Implied probability |
|---|---|---|---|
| -300 | 1.33 | 1/3 | 75.0% |
| -200 | 1.50 | 1/2 | 66.7% |
| -110 | 1.91 | 10/11 | 52.4% |
| +100 | 2.00 | 1/1 | 50.0% |
| +150 | 2.50 | 3/2 | 40.0% |
| +200 | 3.00 | 2/1 | 33.3% |
| +400 | 5.00 | 4/1 | 20.0% |
How to convert
- Positive American to decimal: divide by 100 and add 1. +150 → 1.50 + 1 = 2.50.
- Negative American to decimal: divide 100 by the odds (without the minus) and add 1. -200 → 0.50 + 1 = 1.50.
- Decimal to American: at 2.00 or more, (decimal − 1) × 100 gives a plus number; below 2.00, −100 ÷ (decimal − 1) gives a minus number. 1.50 → −100 ÷ 0.50 = -200.
- Decimal to implied probability: divide 1 by the decimal odds. 2.50 → 40%.
Which format is better?
None: they describe the same price. Decimal odds make multiplying easy, which is why they are handy for working out parlay payouts. American odds make it easy to see favorites and underdogs at a glance.
Betting at Betcris Arizona
Betcris Arizona is licensed by the Arizona Department of Gaming. You must be 21 or older and located in Arizona to place a bet. Check the current promotions before you bet, and read our responsible gaming policy. If gambling stops being fun, call 1-800-NEXT-STEP or text NEXTSTEP to 53342.
Frequently Asked Questions
What is +150 in decimal odds?
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2.50. Divide 150 by 100 and add 1.
What is -110 in decimal odds?
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About 1.91. Divide 100 by 110 (0.909) and add 1.
Do decimal odds include my stake?
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Yes. Decimal odds show the total return, stake included. American and fractional odds show only the profit.
What odds format does Betcris Arizona use?
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American odds, the standard at US sportsbooks.
