The total number of ounces in a liter is 33.814 ounces. However, if you go to a store and check the container, you will most likely see 32 ounces. It is just a rounded off value for easy understanding, but the exact measurement is 33.814. There are actually two ways to spell liter: the American way which is liter and the International Bureau of Weights spelling which is litre.
The word liter started out as the unit for the metric system of French, but now it is used worldwide. One liter is also equivalent to 1 kilogram, but this is not applicable to every liter of liquids such as a liter of alcohol which only has a mass of around 0.8 kilograms and a liter of mercury which has a mass of 13.6 kilograms.
