Volume Converter
Convert volume between liters, gallons, cups, milliliters and more.
Results update as you type.
About this calculator
A volume converter changes a capacity between metric units (milliliter, liter, cubic meter), US customary cooking and liquid measures (teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon), the UK gallon, and cubic inches and feet. Everything converts through the liter.
Frequently asked questions
How many liters are in a US gallon?
One US gallon is about 3.78541 liters. The UK (imperial) gallon is larger at 4.54609 liters, so be sure to pick the right one.
How many milliliters in a cup?
A US cup is about 236.6 milliliters. A US tablespoon is about 14.79 ml and a teaspoon about 4.93 ml.
Why do US and UK gallons differ?
They are simply different historical definitions. A UK gallon is about 20% larger than a US gallon, which is why fuel economy in mpg looks better in the UK.
Results are estimates for general guidance only, not financial, medical or tax advice.