One liter equals 1 3/4 pints. A liter is a metric unit of volume, and a pint is an imperial unit of volume; this discrepancy causes the need for conversion.
There are three different measurements of a pint: the imperial pint, the U.S. liquid pint and the U.S. dry pint. The U.S. liquid pint is used more commonly than the dry pint. An imperial pint, used in the United Kingdom, equals exactly 568 milliliters. A U.S. liquid pint equals about 473 milliliters, while a U.S. dry pint equals about 551 milliliters. A pint is defined as 1/8 of a gallon. The difference between the U.S. and U.K. pints originated in 1824 when Great Britain standardized liquid measurements and the U.S. kept using the older measurements.