๐งช Volume
Convert volume units free: litre, millilitre, gallon, cup, pint, cubic metre. Handles US and UK gallons separately.
๐งช Volume
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About the Volume Tool
Volume conversion has a trap that catches people regularly: US and imperial gallons are different sizes. A US gallon is 3.785 litres while a UK imperial gallon is 4.546 litres โ a 20% difference that matters considerably when converting fuel economy or recipe quantities.
This converter handles litres, millilitres, cubic metres, gallons, quarts, pints, and cups, keeping the US and imperial variants distinct. Everything is calculated instantly in your browser.
How to Use Volume
- Enter the volume value.
- Select the source unit, noting whether US or imperial applies.
- Select the target unit.
- Read the converted result.
When to Use This Tool
- Converting recipe measurements between metric and cup-based systems
- Working out fuel quantities between litres and gallons
- Converting container or tank capacities for shipping
- Translating medical dosages between millilitres and other units
- Comparing product volumes across international packaging
Things Worth Knowing
- A US gallon is 3.785 litres; an imperial gallon is 4.546 litres. Always check which is meant.
- A US cup is 236.6 ml; a metric cup is 250 ml. Recipes rarely specify which.
- One litre is exactly one cubic decimetre, or 1000 cubic centimetres.
Quick Facts
| Tool name | Volume |
| Category | Unit Converters |
| Price | Free โ no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None โ your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
Why are US and UK gallons different?
They descend from different historical standards. The US gallon derives from the English wine gallon of 231 cubic inches; the imperial gallon was redefined in 1824 as the volume of ten pounds of water. Both survived.
How many millilitres in a cup?
It depends on the cup. A US customary cup is 236.6 ml, a US legal cup is 240 ml, and a metric cup is 250 ml. For most cooking the difference is tolerable, but for baking it can matter.
Is a litre the same as a kilogram?
Only for water at standard conditions, where one litre has a mass of one kilogram. Other substances differ by their density โ a litre of oil weighs less, a litre of honey considerably more.
How do I convert cubic metres to litres?
Multiply by 1000. One cubic metre contains 1000 litres, since a litre is one cubic decimetre and there are 1000 of those in a cubic metre.