pint (pt) [1]
a traditional unit of volume equal to 1/2 quart. There are three different quarts in use in Britain and the United States, and hence there are three different pints: [i] the U. S. liquid pint, equal to exactly 28.875 cubic inches, 16 fluid ounces, or approximately 473.176 milliliters; [ii] the U. S. dry pint, equal to 33.600 cubic inches or approximately 550.611 milliliters; and [iii] the British Imperial pint, equal to 20 British fluid ounces, 34.678 cubic inches or approximately 568.261 milliliters. The origin of the word pint is unclear. It may come from the Latin pincta, painted, referring to a marking at the one-pint level on a larger container.

so it can either be 473 or 550 in the USA or 568 in the UK

I believe it can also be different in other parts of the world like Australia, anyone wanna answer with their countries conversion ?