There are 16 U.S. ounces in 1 U.S. pint. This should not be confused with metric units, where there are 20 U.K. ounces in 1 U.K. pint.
Ounces and pints are both common imperial units that are used to measure volume. Volume is a measure of how much space a substance can occupy.
The measurement of a pint is most commonly used in establishments that serve alcohol. A pitcher of beer, for example, contains exactly 1 pint of beer. Despite being an imperial unit, the pint is still often used in this context in countries that use the metric system like Canada and Australia.