Volume Converter
Convert liters, milliliters, gallons, and cubic measurements quickly.
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Choose the unit you have and the unit you want.
About This Tool
Why use Volume Converter?
Convert between millilitres, litres, cubic metres, US gallons, quarts, pints and fluid ounces. Liquid measures are where US and imperial units differ most, so it pays to know which system a figure came from.
A US gallon is 3.785 litres while an imperial gallon is 4.546 — a 20% difference that ruins a fuel calculation if you mix them up. Likewise a US fluid ounce is 29.57 ml and an imperial one is 28.41 ml. This converter uses US customary measures.
Key Benefits
Everyday and technical units
Millilitres and litres alongside gallons, quarts, pints and fluid ounces.
US customary measures
Stated explicitly, so you know which gallon and fluid ounce the numbers refer to.
Handles very large and small volumes
From a few millilitres of medicine to cubic metres of tank capacity.
How to use Volume Converter
- 1
Choose the unit you have and the unit you want.
- 2
Enter the value and read the result.
- 3
Check whether your source uses US or imperial gallons before trusting a fuel or recipe figure.
- 4
Swap the units to convert back.
Best use cases
Convert a recipe between millilitres and cups or fluid ounces.
Work out tank or aquarium capacity in gallons.
Convert fuel volumes between litres and gallons.
Check a medicine dose written in a different unit.
Volume Converter FAQs
How many litres are in a US gallon?
3.785 litres. An imperial (UK) gallon is 4.546 litres.
How many millilitres are in a fluid ounce?
29.57 ml for a US fluid ounce and 28.41 ml for an imperial one.
How much is one cup?
236.6 ml for a US cup. Australia, New Zealand and Canada use a 250 ml metric cup, which matters in baking.
How many litres are in a cubic metre?
Exactly 1,000. A cubic foot is about 28.32 litres.
Related Units Tools
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