Enter an amount and its unit to convert it into every other common liquid measurement, U.S. and metric.
All liquid volume units convert through a common base — this calculator uses milliliters. A U.S. fluid ounce is defined as 29.5735 mL, and every other unit (cup, pint, quart, gallon, liter) is a fixed multiple of a fluid ounce or milliliter, so converting between any two is just multiplication and division through that shared base.
Source: Based on standard U.S. customary-to-metric liquid volume equivalents published by NIST (1 U.S. fluid ounce = 29.5735 mL).
A U.S. cup is about 236.6 milliliters. This differs from a metric cup (250 mL) or a U.K. imperial cup, so check which standard a recipe uses when precision matters.
There are 16 U.S. cups in 1 U.S. gallon (4 quarts, or 8 pints).
Because every unit here is defined as an exact multiple of milliliters, converting through that single shared base avoids the small rounding errors that build up from chaining several different conversion factors together.
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