Volume Converter
Convert between liters, gallons, cups, milliliters, fluid ounces, and more.
Examples
| Input | Result |
|---|---|
| 1 US gallon | 3.78541 liters |
| 1 US cup | 236.588 milliliters |
| 2 liters | 67.628 US fluid ounces |
About this tool
Convert between metric volume units (cubic meters, liters, milliliters) and US customary units (gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons). The converter also supports UK gallons, which differ from US gallons. This comes up constantly in cooking, where recipes from different countries may use different measurement systems.
One source of confusion is that US and imperial fluid ounces are not the same size. A US fluid ounce is about 29.57 ml, while an imperial fluid ounce is about 28.41 ml. The converter uses US customary units by default, with UK gallons available as a separate option. If you are converting recipe measurements, keep in mind that a "cup" can mean different things depending on the country: a US cup is 236.6 ml, a metric cup (used in Australia) is 250 ml, and a Japanese cup is 200 ml.
Frequently asked questions
How many cups are in a gallon?
There are 16 US cups in a US gallon. Each cup is 8 fluid ounces, and a gallon is 128 fluid ounces.
What is the difference between a US gallon and a UK gallon?
A US gallon is 3.785 liters, while a UK (imperial) gallon is 4.546 liters. The imperial gallon is about 20% larger.
How many milliliters are in a tablespoon?
A US tablespoon is approximately 14.787 ml. A metric tablespoon, used in some countries, is exactly 15 ml.