Volume Converter
Convert liters, milliliters, US and UK gallons, cups, fluid ounces, cubic feet and more.
How to use
- 1Enter the volume and choose its unit.
- 2Pick the target unit. US and UK gallons and fluid ounces are listed separately.
How it's calculated
Everything converts through liters. 1 US gallon = 3.785411784 L; 1 UK (imperial) gallon = 4.54609 L.
Frequently asked questions
How many liters are in a gallon?
A US gallon is 3.785 liters; a UK imperial gallon is 4.546 liters — about 20% bigger.
How many milliliters are in a US cup?
The customary US cup is about 236.6 mL. Nutrition labels use a rounded 240 mL.
Is a US fluid ounce the same as a UK fluid ounce?
No. A US fl oz is about 29.57 mL; a UK fl oz is about 28.41 mL.