Free calculator
Odds converter
Type a price in any format and see it in all the others at once: decimal, American, fractional, implied probability and the three Asian formats.
Runs entirely in your browser; nothing you type is sent anywhere. For information only: PinnRadar sells odds data, takes no bets and gives no betting advice.
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Get a free key →Odds conversion table
Common prices in the four formats bettors use most.
| Decimal | American | Fractional | Implied probability |
|---|---|---|---|
| 1.10 | -1000 | 1/10 | 90.91% |
| 1.20 | -500 | 1/5 | 83.33% |
| 1.25 | -400 | 1/4 | 80% |
| 1.33 | -303 | 33/100 | 75.19% |
| 1.40 | -250 | 2/5 | 71.43% |
| 1.50 | -200 | 1/2 | 66.67% |
| 1.60 | -167 | 3/5 | 62.5% |
| 1.67 | -149 | 67/100 | 59.88% |
| 1.75 | -133 | 3/4 | 57.14% |
| 1.80 | -125 | 4/5 | 55.56% |
| 1.91 | -110 | 91/100 | 52.36% |
| 2.00 | +100 | 1/1 | 50% |
| 2.10 | +110 | 11/10 | 47.62% |
| 2.20 | +120 | 6/5 | 45.45% |
| 2.50 | +150 | 3/2 | 40% |
| 2.75 | +175 | 7/4 | 36.36% |
| 3.00 | +200 | 2/1 | 33.33% |
| 3.50 | +250 | 5/2 | 28.57% |
| 4.00 | +300 | 3/1 | 25% |
| 5.00 | +400 | 4/1 | 20% |
| 6.00 | +500 | 5/1 | 16.67% |
| 7.00 | +600 | 6/1 | 14.29% |
| 9.00 | +800 | 8/1 | 11.11% |
| 11.00 | +1000 | 10/1 | 9.09% |
The formulas
- American to decimal:
+A → 1 + A/100,−A → 1 + 100/A - Decimal to American:
d ≥ 2 → +(d − 1) × 100,d < 2 → −100 / (d − 1) - Fractional to decimal:
a/b → 1 + a/b - Implied probability:
1 / d - Hong Kong:
d − 1
Implied probability is not the true probability
The probability you read off a single price still contains the bookmaker’s margin. To get a fair probability, take every outcome of the market and remove the margin with the no-vig calculator. Pinnacle’s low margin makes its prices the usual reference; you can browse them on the live Pinnacle odds board or pull them from the odds API.
Questions people ask
How do I convert American odds to decimal?
For positive American odds, divide by 100 and add 1: +150 becomes 2.50. For negative odds, divide 100 by the number without its minus sign and add 1: −200 becomes 1.50.
How do I convert decimal odds to implied probability?
Divide 1 by the decimal price. Odds of 2.50 imply 1 / 2.50 = 40%. Across a whole market these probabilities add up to more than 100% because of the bookmaker margin, which the no-vig calculator removes.
How do fractional odds work?
Fractional odds give the profit per unit staked. 5/2 means a 2-unit stake wins 5 units of profit, which is 3.50 in decimal (profit plus the stake back).
What are Hong Kong, Malay and Indonesian odds?
Asian formats. Hong Kong odds are decimal minus 1. Malay odds match Hong Kong up to evens and turn negative beyond it (−0.5 equals 3.00 decimal). Indonesian odds are the reverse: positive from evens up, negative below it, like American odds divided by 100.
What format does the PinnRadar API use?
Decimal odds, the same way Pinnacle quotes them. Converting to any other format is one line of code with the formulas on this page.
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