Free Tools

Odds Converter

Enter odds in any format and instantly see the equivalent in all other formats. Click any result to copy it.

Convert Odds

Click a result box to use it as a new input

copy
American
-
e.g. -110 or +150
copy
Decimal
-
e.g. 1.909
copy
Fractional
-
e.g. 10/11
copy
Implied %
-
win probability
Win probability -

Common Odds Reference

Click any row to load it into the converter.

AmericanDecimalFractionalImpliedDescription
Heavy Favorites
-5001.2001/583.3%Strong favorite
-3001.3331/375.0%Big favorite
-2001.5001/266.7%Clear favorite
-1501.6672/360.0%Moderate favorite
Near Even Money
-1301.76910/1356.5%Slight favorite
-1201.8335/654.5%Slight favorite
-1101.90910/1152.4%Standard spread juice
-1051.95220/2151.2%Reduced juice
+1002.0001/150.0%Even money
Underdogs
+1102.10011/1047.6%Slight underdog
+1302.30013/1043.5%Moderate underdog
+1502.5003/240.0%Clear underdog
+2003.0002/133.3%Big underdog
+3004.0003/125.0%Heavy underdog
+5006.0005/116.7%Long shot
+100011.00010/19.1%Futures / long shot

Where conversion actually matters

Decimal odds are what you multiply to price a parlay, and implied probabilities are what you add to test a pair of prices for an arbitrage. Both guides work through the arithmetic step by step.

How to calculate parlay odds The two-way arbitrage test Parlay Calculator Methodology