Odds Converter
An odds converter turns one price into the other formats. Decimal = fractional + 1. American +X is decimal 1 + X/100, and −X is 1 + 100/X. Implied probability = 1 ÷ decimal. Example: 2.50 = 3/2 = +150 = 40%.
Type any one of them below. A plain number is read as decimal odds, so give positive American odds their + sign. A figure marked ≈ is rounded for display; the fraction is always exact.
By CricketPrediction.com ·
Enter any odds
Decimal, fraction, American or %
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Stake × odds = return
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Profit per stake, exact
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+ longer, − shorter than evens
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Margin included
Enter odds above to see what the stake returns.
How to Convert Odds by Hand
Fractional to decimal
Divide the top by the bottom and add 1. 5/2 is 2.5, plus 1, so 3.50.
Decimal to fractional
Take off 1, write what is left as a fraction and cut it down. 1.80 leaves 0.80, which is 80/100, or 4/5.
Decimal to American, and back
At 2.00 or more, take off 1 and times by 100: 2.10 is +110. Under 2.00, divide −100 by the odds minus 1: 1.80 is −100 ÷ 0.80 = −125. Back again, +150 is 1 + 150/100 = 2.50 and −200 is 1 + 100/200 = 1.50.
Any format to implied probability
Convert to decimal, then divide 1 by it. 2.00 is 50% and 2.50 is 40%.
Worked Example: India v Australia
Say a bookmaker offers India at 1.80 and Australia at 2.10. The odds converter gives:
| Team | Decimal | Fractional | American | Implied |
|---|---|---|---|---|
| India | 1.80 | 4/5 | −125 | ≈ 55.56% |
| Australia | 2.10 | 11/10 | +110 | ≈ 47.62% |
₹100 on India returns ₹180 if they win: ₹80 profit. The two implied probabilities add up to 103.17%, not 100%. The extra 3.17% is the bookmaker's margin, so neither figure is a fair chance. Our implied probability calculator takes the margin out.
Take a US price of −110. That is 10/11 as a fraction, and 21/11 as decimal odds: 1.909090…, which the converter shows as ≈ 1.9091.
Which Odds Format Is Used Where
Decimal odds are what our match odds use. Is a price on one of the Indian betting sites shown as a fraction or an American figure? Convert it here before you compare it.
Decimal odds are also the usual format in continental Europe, Australia, New Zealand and Canada. Betting exchanges tend to use them too.
Fractional odds are most common in the UK and Ireland, and common in horse racing everywhere.
American odds are used mostly by US bookmakers.
Frequently Asked Questions
What are decimal odds?
Decimal odds are the total return for each 1 staked, stake included. ₹100 at 2.50 returns ₹250 if it wins: ₹150 profit plus the ₹100 stake.
How do fractional odds work?
Fractional odds give the profit per stake: 5/2 wins 5 for every 2 staked. Decimal odds are the fraction plus 1, so 5/2 is 2.5 + 1 = 3.50.
How do American odds work?
A plus figure is the profit on a 100 stake: +150 wins 150. A minus figure is the stake needed to win 100: −200 stakes 200. Minus means odds shorter than evens (under 2.00 decimal), plus means longer, and evens is +100.
How do you convert decimal odds to American odds?
At 2.00 or more, American = (decimal − 1) × 100, so 2.10 is +110. Under 2.00, American = −100 ÷ (decimal − 1), so 1.80 is −125. Going back, +X is 1 + X/100 and −X is 1 + 100/X.
What is implied probability?
It is 1 ÷ the decimal odds, as a percentage: 2.00 is 50%. It includes the bookmaker's margin, so one market's implied probabilities add up to more than 100%: India 1.80 and Australia 2.10 make 103.17%.
How do I compare a price with my own chance?
Multiply your chance by the decimal odds. If you give India a 60% chance at 2.00, each ₹100 expects 0.60 × ₹200 = ₹120 back, a 20% expected profit. The 10-point gap between 60% and 50% is not the edge. And the answer is only as good as your 60%.
Why does the converter show ≈?
Some prices have no short exact decimal. −110 is 21/11 = 1.909090…, so the converter shows 1.9091 and marks it ≈. The fraction, 10/11, stays exact.
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