Volume Converter
Convert between millilitres, litres, cubic metres, teaspoons, tablespoons, cups, pints, quarts, US and UK gallons and fluid ounces. Results update as you type. Last updated: June 2026.
Best for: Converting millilitres to fluid ounces for a recipe, and translating litres to gallons when comparing fuel figures
Limitations: US and imperial gallons and ounces differ, so check which system a source uses before trusting the result
Best suited for: Home cooks and DIYers working from instructions written for another country
Popular Volume Conversions
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Cooking Volume Reference (US measurements)
| Recipe Measure | ml | fl oz (US) |
|---|---|---|
| 1 US teaspoon | 4.93 ml | 0.167 fl oz |
| 1 US tablespoon | 14.79 ml | 0.5 fl oz |
| 1 US cup | 236.6 ml | 8 fl oz |
| 1 US pint | 473.2 ml | 16 fl oz |
| 1 US quart | 946.4 ml | 32 fl oz |
| 1 US gallon | 3, 785 ml | 128 fl oz |
Note: Australian and UK cup measurements differ. 1 metric cup (AU/NZ) = 250 ml vs 236.6 ml for the US cup.
Frequently Asked Questions
How many ml in a litre?
1 litre = 1, 000 millilitres. The prefix "milli" means 1/1000 in the metric system. A standard 500 ml water bottle is half a litre. A can of drink is typically 330 ml or 355 ml.
How many litres in a US gallon?
1 US gallon = 3.78541 litres. The US gallon is smaller than the UK imperial gallon (4.54609 litres). When reading fuel economy figures, check whether miles per gallon uses US or UK gallons.
How many ml in a cup?
1 US cup = 236.588 ml. In Australia and New Zealand, 1 metric cup = 250 ml. When following recipes, check which cup measurement is intended. The difference matters for baking where precision is important.
What is the difference between US and UK gallons?
1 UK imperial gallon = 4.54609 litres. 1 US gallon = 3.78541 litres. The UK gallon is about 20% larger. Car fuel economy in mpg will differ significantly depending on whether US or UK gallons are used in the calculation.
How many tablespoons in a cup?
16 US tablespoons = 1 US cup (236.6 ml). 1 US tablespoon = 14.79 ml = 3 US teaspoons. For cooking conversions, this tool handles all common US and metric recipe measurements instantly.
How Does the Volume Converter Work?
The converter reduces your input to litres or cubic metres and converts out from there. Volume needs more care than length because two different gallons remain in use: the US liquid gallon of 3.785411784 litres and the imperial gallon of 4.54609 litres, a difference of about 20 percent. The converter treats them as separate units rather than assuming one.
The metric definitions are published in the NIST guide to SI units.
Common Volume Conversions and When You Need Them
Cooking is the first case, where recipes mix millilitres, cups, fluid ounces and tablespoons, and the cup itself differs between the United States, the United Kingdom and Australia. Fuel economy is the second, and the gallon ambiguity matters most here, since miles per US gallon and miles per imperial gallon are not comparable figures.
Shipping and freight is the third, where cubic metres are the billing unit but package dimensions arrive in inches. Aquariums, tanks and pools are the fourth, quoted in litres or in gallons depending on the supplier, with a 1,000 litre tank holding about 264 US gallons.
What Are the Standard Volume Measurements?
The cubic metre is the SI coherent derived unit for volume. The litre is accepted for use with SI and is defined as exactly one cubic decimetre, so 1,000 litres make one cubic metre. The US liquid gallon is defined as exactly 231 cubic inches, and the imperial gallon as exactly 4.54609 litres, which is why the two are not interchangeable. Both fluid ounces follow from their respective gallons and also differ.