Volume Converter Online

Volume conversions come up in cooking (cups to millilitres), chemistry (litres to fluid ounces), shipping (cubic metres to cubic feet), and fuel measurements (gallons to litres). The unit systems don't align cleanly, which makes a converter genuinely useful.

How it works

Enter a value, select your source unit, and the tool applies standard conversion constants to display the equivalent in all supported units simultaneously. Everything runs client-side.

How to use it

1. Enter your volume value
2. Select the source unit from the dropdown
3. Read all converted values — click any to copy it

Supported units

Millilitre (mL), litre (L), cubic metre (m³), cubic centimetre (cm³), US fluid ounce (fl oz), US cup, US pint, US quart, US gallon, Imperial fluid ounce, Imperial pint, Imperial gallon, and cubic inch/foot.

A few things worth knowing

• US vs Imperial: US and Imperial (UK) gallons are different — a US gallon is 3.785 litres, an Imperial gallon is 4.546 litres. The same applies to pints, cups, and fluid ounces. When following a recipe or fuel spec, check which system it uses
• Cubic units for dry/bulk volume: Cubic metres and cubic feet are used for bulk materials, shipping containers, and rooms. Litres and gallons are for liquids
• 1 mL = 1 cm³: Exactly, by definition. Useful when switching between chemistry and cooking contexts

FAQ

How many cups are in a litre? Approximately 4.227 US cups per litre.

How do I convert US gallons to litres? Multiply by 3.78541. For example, 5 US gallons ≈ 18.93 litres.

What's the difference between a fluid ounce and a regular ounce? A fluid ounce measures volume; a regular ounce measures weight/mass. They're completely different units that happen to share a name.

Related Tools

• Unit Converter
• Weight Converter