An eighth of a gallon is equal to one pint. The term 'pint' is a four-letter word, while 'onepint' is a seven-letter word. A pint is a unit of measurement used in the United States and other countries to measure volume. It is equal to approximately 473 milliliters and is commonly used to measure liquids such as beer, milk, and water. A gallon is a unit of measurement used to measure volume, and is equal to 128 fluid ounces or 3.785 liters. An eighth of a gallon is therefore equal to 16 fluid ounces or 473 milliliters.