Volume Converter
Volume measurements vary significantly between countries. The US cup equals 236.59 ml, while the metric cup used in Australia, Canada and New Zealand equals exactly 250 ml. US gallons (3.785 L) are approximately 20% smaller than UK imperial gallons (4.546 L). When following international recipes or comparing fuel economy figures, it is important to confirm which measurement system is in use.
In the metric system, one litre equals exactly 1,000 millilitres and one litre of water weighs approximately one kilogram at standard conditions.
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Frequently Asked Questions
How many ml in a cup?
One US cup equals 236.59 ml. A metric cup (used in Australia, Canada and New Zealand) equals exactly 250 ml. When following international recipes, it is worth checking which cup measure is intended, as the difference adds up in baking.
How many litres in a gallon?
One US gallon equals 3.78541 litres. One imperial (UK) gallon equals 4.54609 litres. US gallons are approximately 20% smaller than UK gallons, which matters when comparing fuel economy figures across countries.
What is the difference between a US gallon and a UK gallon?
A US gallon equals 3.78541 litres. A UK imperial gallon equals 4.54609 litres, making it approximately 20% larger. This matters when comparing fuel economy: a car described as achieving 40 mpg on US gallons performs differently to one achieving 40 mpg on UK gallons.
How many ml in a fluid ounce?
One US fluid ounce equals 29.5735 ml. One UK (imperial) fluid ounce equals 28.4131 ml. When following American recipes, use the US fluid ounce figure. There are 8 fluid ounces in one US cup.