Calculators
Volume Unit Converter
Convert between metric, US customary and UK volume units instantly. Supports millilitres, centilitres, decilitres, litres, cubic metres, teaspoons, tablespoons, fluid ounces, cups, pints, quarts and gallons. Results update as you type.
About the Volume Converter
Convert between metric volumes (ml to m³), US customary cooking units (teaspoons to gallons) and UK imperial units. All values update as you type.
US vs UK — why they differ
A US fluid ounce is 29.5735 ml; a UK fluid ounce is 28.4131 ml. A US gallon is 3.785 l; a UK gallon is 4.546 l. Always check which system a recipe uses before scaling.
1 US cup = 8 US fl oz = 236.6 ml. There is no standard "cup" in the UK imperial system.
Frequently asked questions
How many ml in a US cup?
One US cup equals 236.588 ml (approximately 237 ml). Note that the UK/metric cup is 250 ml, so check which standard applies to your recipe.
Is a US gallon the same as a UK gallon?
No. A US liquid gallon is 3.785 litres, while an imperial (UK) gallon is 4.546 litres — about 20% larger. This converter distinguishes both.