Enter any price
American, decimal, fractional or a percentage. Use the format your book shows.
Odds converter
Type a price in any format. The other three fill in as you type, along with the payout on your stake and the win probability the price implies.
Enter a price in any box
Common lines
At this price
Profit on a win$90.91
Total return$190.91
Break-even win rate52.38%-110 needs a 52.38% win rate to break even.
Fractional odds round to the nearest fraction with a denominator of 100 or less. Pricing both sides of a market? The no-vig calculator shows the fair line.
How it works, the math and FAQ
How to use the converter
Three steps, any format
Read the other formats
Every box updates on each keystroke. Decimal odds include your stake. American and fractional odds show profit only.
Check the break-even
The implied probability is the win rate you need to break even at the price. Hold the number up against your own read on the game.
The three formats
American, decimal and fractional odds
US books quote American odds. A minus number shows the stake needed to win $100. A plus number shows the profit on a $100 bet. Most of the world uses decimal odds, which fold your stake into the price, so 2.50 returns $2.50 for every $1 staked. UK and Irish books still post fractional odds such as 5/2, read as profit over stake.
All three describe the same price. The implied probability turns any of them into the win rate the price assumes, which makes lines from different books and sports easy to compare.
The formulas
How odds conversion works
plus odds decimal = 1 + american / 100 minus odds decimal = 1 + 100 / |american| any price implied = 1 / decimal fractional = (decimal - 1) as a fraction
Example: a $50 bet at -110
- Decimal: 1 + 100 / 110 = 1.909
- Total return: $50 × 1.909 = $95.45
- Profit: $95.45 - $50 = $45.45
- Break-even: 1 / 1.909 = 52.38%
Reference
Odds conversion chart
Common US lines in every format, with the profit on a $100 bet.
| American | Decimal | Fractional | Implied probability | Profit on $100 |
|---|---|---|---|---|
| -500 | 1.200 | 1/5 | 83.33% | $20.00 |
| -300 | 1.333 | 1/3 | 75.00% | $33.33 |
| -250 | 1.400 | 2/5 | 71.43% | $40.00 |
| -200 | 1.500 | 1/2 | 66.67% | $50.00 |
| -175 | 1.571 | 4/7 | 63.64% | $57.14 |
| -150 | 1.667 | 2/3 | 60.00% | $66.67 |
| -130 | 1.769 | 10/13 | 56.52% | $76.92 |
| -120 | 1.833 | 5/6 | 54.55% | $83.33 |
| -115 | 1.870 | 20/23 | 53.49% | $86.96 |
| -110 | 1.909 | 10/11 | 52.38% | $90.91 |
| -105 | 1.952 | 20/21 | 51.22% | $95.24 |
| +100 | 2.000 | 1/1 | 50.00% | $100.00 |
| +110 | 2.100 | 11/10 | 47.62% | $110.00 |
| +120 | 2.200 | 6/5 | 45.45% | $120.00 |
| +130 | 2.300 | 13/10 | 43.48% | $130.00 |
| +150 | 2.500 | 3/2 | 40.00% | $150.00 |
| +175 | 2.750 | 7/4 | 36.36% | $175.00 |
| +200 | 3.000 | 2/1 | 33.33% | $200.00 |
| +250 | 3.500 | 5/2 | 28.57% | $250.00 |
| +300 | 4.000 | 3/1 | 25.00% | $300.00 |
| +400 | 5.000 | 4/1 | 20.00% | $400.00 |
| +500 | 6.000 | 5/1 | 16.67% | $500.00 |
FAQ
Common questions
How do you convert American odds to decimal?
For plus odds, divide by 100 and add 1, so +150 becomes 2.50. For minus odds, divide 100 by the number without its sign and add 1, so -110 becomes 1.909.
How do you convert odds to a percentage?
Divide 1 by the decimal odds. 1.909 gives 52.38%. The result is the implied probability, the win rate you need to break even at the price.
What does -110 mean in betting?
You stake $110 to win $100. The implied probability is 52.38%, so you need to win more than 52.38% of your bets at -110 to turn a profit.
Why do both sides of a line add up to more than 100%?
The book builds a margin into every line. Two sides at -110 imply 52.38% each, or 104.76% in total. The extra 4.76% is the hold. The no-vig calculator strips the hold out and shows the fair price.
What is +100 in decimal and fractional odds?
+100 is 2.00 in decimal and 1/1 in fractional, called even money. A $100 bet wins $100, and the implied probability is 50%.
The Kennel
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