Odds Converter
An odds converter translates American, decimal, and fractional prices without changing their economic meaning. Enter one valid format to see the equivalent payout and implied break-even probability in the others. The probability still includes bookmaker margin, so use a no-vig calculation when you want a market-based estimate of fair probability.
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More on converting odds
Odds are displayed in different formats—American (-110), decimal (1.91), fractional (10/11). This converter translates between them and shows implied probability, so you can read any line and compare across sportsbooks.
Essential when shopping lines or plugging odds into EV and no-vig calculators.
Odds Converter
Fractional odds conversion table
Popular searches in one line: 11/4 is +275 (3.75 decimal); 10/11 is about −110 (1.91); 11/8 is +138 (2.375); 4/6 is about −150 (1.67); and 1.90 decimal is about −111 American.
| Fractional | Decimal | American | Implied probability |
|---|---|---|---|
| 1/10 | 1.100 | -1000 | 90.91% |
| 1/8 | 1.125 | -800 | 88.89% |
| 1/7 | 1.143 | -700 | 87.50% |
| 1/6 | 1.167 | -600 | 85.71% |
| 1/5 | 1.200 | -500 | 83.33% |
| 2/9 | 1.222 | -450 | 81.82% |
| 1/4 | 1.250 | -400 | 80.00% |
| 2/7 | 1.286 | -350 | 77.78% |
| 3/10 | 1.300 | -333 | 76.92% |
| 1/3 | 1.333 | -300 | 75.00% |
| 4/11 | 1.364 | -275 | 73.33% |
| 2/5 | 1.400 | -250 | 71.43% |
| 4/9 | 1.444 | -225 | 69.23% |
| 1/2 | 1.500 | -200 | 66.67% |
| 8/15 | 1.533 | -188 | 65.22% |
| 4/7 | 1.571 | -175 | 63.64% |
| 8/13 | 1.615 | -162 | 61.90% |
| 4/6 | 1.667 | -150 | 60.00% |
| 8/11 | 1.727 | -137 | 57.89% |
| 4/5 | 1.800 | -125 | 55.56% |
| 5/6 | 1.833 | -120 | 54.55% |
| 10/11 | 1.909 | -110 | 52.38% |
| 1/1 | 2.000 | +100 | 50.00% |
| 11/10 | 2.100 | +110 | 47.62% |
| 6/5 | 2.200 | +120 | 45.45% |
| 5/4 | 2.250 | +125 | 44.44% |
| 11/8 | 2.375 | +138 | 42.11% |
| 6/4 | 2.500 | +150 | 40.00% |
| 13/8 | 2.625 | +163 | 38.10% |
| 7/4 | 2.750 | +175 | 36.36% |
| 15/8 | 2.875 | +188 | 34.78% |
| 2/1 | 3.000 | +200 | 33.33% |
| 9/4 | 3.250 | +225 | 30.77% |
| 5/2 | 3.500 | +250 | 28.57% |
| 11/4 | 3.750 | +275 | 26.67% |
| 3/1 | 4.000 | +300 | 25.00% |
| 10/3 | 4.333 | +333 | 23.08% |
| 7/2 | 4.500 | +350 | 22.22% |
| 4/1 | 5.000 | +400 | 20.00% |
| 9/2 | 5.500 | +450 | 18.18% |
| 5/1 | 6.000 | +500 | 16.67% |
| 6/1 | 7.000 | +600 | 14.29% |
| 7/1 | 8.000 | +700 | 12.50% |
| 8/1 | 9.000 | +800 | 11.11% |
| 9/1 | 10.000 | +900 | 10.00% |
| 10/1 | 11.000 | +1000 | 9.09% |
| 12/1 | 13.000 | +1200 | 7.69% |
| 14/1 | 15.000 | +1400 | 6.67% |
| 16/1 | 17.000 | +1600 | 5.88% |
| 20/1 | 21.000 | +2000 | 4.76% |
| 25/1 | 26.000 | +2500 | 3.85% |
| 33/1 | 34.000 | +3300 | 2.94% |
| 40/1 | 41.000 | +4000 | 2.44% |
| 50/1 | 51.000 | +5000 | 1.96% |
| 66/1 | 67.000 | +6600 | 1.49% |
| 80/1 | 81.000 | +8000 | 1.23% |
| 100/1 | 101.000 | +10000 | 0.99% |
Worked example: converting 10/11 to American and decimal odds
Fractional odds express profit relative to stake: 10/11 means an $11 stake returns $10 profit if the bet wins. Converting to decimal odds adds 1 to that ratio: 10 ÷ 11 = 0.909, plus 1 equals 1.909 decimal odds — the total payout, stake included, per dollar wagered.
From decimal odds, American odds follow one rule: if decimal odds are 2.00 or higher, American odds equal (decimal − 1) × 100, expressed as a positive number; if decimal odds sit below 2.00, American odds equal −100 ÷ (decimal − 1). Since 1.909 is below 2.00, the calculation is −100 ÷ 0.909 = −110. So 10/11 fractional, 1.909 decimal, and −110 American describe the same price — 1.909 here is a rounded display of the repeating decimal 1.909090…, which is precise enough for comparing formats by eye but not for cent-level stake calculations.
Try a plus-money example: 5/2 fractional means a $2 stake wins $5 profit. Decimal odds are 5 ÷ 2 + 1 = 3.50. Since 3.50 is at least 2.00, American odds are (3.50 − 1) × 100 = +250. All three formats still describe one payout; only the arithmetic used to express it changes.
When the odds format actually matters
For pricing a single bet, format is cosmetic: converting −110 to 1.909 decimal or 10/11 fractional changes nothing about the payout or the implied break-even probability. Pick whichever format a sportsbook displays and convert only when comparing a price against a source quoted differently, such as a European exchange listing decimal odds against a US book showing American odds.
Format starts to matter operationally in parlay math and quick mental comparisons. Decimal odds multiply cleanly across parlay legs, which is why they are the standard in most parlay and arbitrage tooling; American odds require converting to decimal or implied probability first. Fractional odds are the least convenient for multi-leg math but remain the default display in UK and Irish books, so converting is often the first step before any further calculation.
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Odds converter questions
What is 10/11 in American odds?
Fractional odds of 10/11 are approximately −110 in American format and 1.91 in decimal format.
What is 1.90 decimal in American odds?
Decimal odds of 1.90 convert to approximately −111 American odds.
Does converting odds remove the vig?
No. Conversion changes only the display format; the underlying price and bookmaker margin remain the same.
How do I convert odds to probability?
Enter the price in whatever format you have — American, decimal, or fractional — and this tool shows the implied probability alongside the converted values in the other two formats.
What is 11/4 in decimal odds?
Fractional odds of 11/4 are 3.75 in decimal format, approximately +275 in American format, and imply a 26.67% break-even probability.
How do I convert fractional odds to decimal odds?
Divide the numerator by the denominator and add 1. For example, 10/11 becomes 10 ÷ 11 + 1 = 1.909 decimal.