Volume Converter●
From a measuring cup to a storage tank. Convert metric, US and UK volumes with clear labels.
Volume
Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Common conversions
Pick an example to startAll equivalent units
The same value, in every supported unit.
US and UK measures are different.
Choose the system specified by your recipe or measurement. US customary cups and 250 mL metric cups are separate options. Converting volume into weight also requires the substance’s density.
- 1 L
- 1,000 mL
- 1 US gal
- 3.785411784 L
- 1 UK gal
- 4.54609 L
Calculation details & precision
Volume conversions use litres as the base unit. One litre is 1,000 mL or 0.001 m³. A US liquid gallon is exactly 3.785411784 L; a UK Imperial gallon is exactly 4.54609 L. The US customary cup is 1/16 of a US liquid gallon; the metric cup here is 250 mL.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
Are US and UK gallons the same?
No. One US liquid gallon is exactly 3.785411784 L; one UK Imperial gallon is exactly 4.54609 L. US liquid and UK Imperial pints, quarts and fluid ounces also differ.
Which cup should I use?
A US customary cup is 236.5882365 mL. The metric cup in this converter is 250 mL. Follow the measuring system specified by the recipe. US nutrition labels may use a 240 mL cup, which is not the US customary cup offered here.
Can I convert millilitres to grams?
Not from volume alone. You also need the substance’s density and relevant conditions such as temperature. Fluid ounces measure volume; standard ounces in the Weight Converter measure mass.
How many litres are in a cubic metre?
One cubic metre is exactly 1,000 litres. One millilitre equals one cubic centimetre.