Convert volume between liters, milliliters, cubic meters, and US customary units: gallons, quarts, pints, cups and fluid ounces. Hand for cooking, fuel economy and aquarium math alike.
The page uses US customary definitions: 1 US gallon = 3.785411784 liters exactly, 1 cup = 236.5882365 ml, and 8 fluid ounces per cup. Note that imperial (UK) gallons are about 20% larger.
Frequently asked questions
How many ml is one US cup?
236.5882365 ml by US legal definition — commonly rounded to 240 ml in recipes.
Is a UK gallon the same as a US gallon?
No. An imperial gallon is about 4.546 liters; a US gallon is 3.785 liters.
How many cups are in a quart?
4 cups — the US customary ladder is 1 gallon = 4 quarts = 8 pints = 16 cups.
中文说明
在升、毫升、立方米与美制加仑、夸脱、品脱、杯、液量盎司之间换算，可用于烹饪、油耗与水族箱容量计算。
本页采用美制度量定义：1 美制加仑精确等于 3.785411784 升，1 杯 = 236.5882365 毫升，1 杯 = 8 液量盎司。注意英制（英联邦）加仑约大 20%。
常见问题
一美制杯等于多少毫升？
按美国法定定义为 236.5882365 毫升，食谱中常取整为 240 毫升。
英制加仑和美制加仑一样吗？
不一样。英制加仑约 4.546 升，美制加仑为 3.785 升。
一夸脱等于几杯？
4 杯——美制进率为 1 加仑 = 4 夸脱 = 8 品脱 = 16 杯。