Odds Converter

Convert between American, Decimal, Fractional, and Implied Probability odds formats instantly. Enter any format and see all conversions live.

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American odds

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Common Odds Reference

American	Decimal	Fractional	Implied Prob
-500	1.20	1/5	83.33%
-200	1.50	1/2	66.67%
-150	1.667	2/3	60.00%
-110	1.909	10/11	52.38%
+100	2.00	1/1	50.00%
+110	2.10	11/10	47.62%
+150	2.50	3/2	40.00%
+200	3.00	2/1	33.33%
+300	4.00	3/1	25.00%
+500	6.00	5/1	16.67%

Frequently Asked Questions

What are American odds?

American odds use +/- notation. Negative odds (e.g. -150) show how much you bet to win $100. Positive odds (e.g. +200) show how much you win on a $100 bet. They're the standard format at US sportsbooks.

What are decimal odds?

Decimal odds represent your total return per $1 wagered, including your stake. Odds of 2.50 mean a $100 bet returns $250 total ($150 profit + $100 stake). This format is standard in Europe, Australia, and Canada.

What is implied probability?

Implied probability converts odds into a percentage representing the market's estimated chance of an outcome occurring. It includes the sportsbook's margin (vig), so the probabilities for all outcomes in a market will sum to more than 100%.