Volume Converter
Convert between litres, millilitres, US gallons, cups and more instantly.
Your conversions appear here
Enter a volume and pick its unit. Every other unit is calculated live as you type — right here in your browser, with nothing sent to a server.
Runs entirely in your browserConvert any volume unit, locally
This converter turns a single volume value into every other supported unit at once. Type a number, choose the unit it is in, and the full conversion table updates as you type. It covers metric units — cubic metre, litre, millilitre — and US customary units — gallon, quart, pint, cup and fluid ounce. Each conversion goes through litres as a common base, so results stay consistent no matter which unit you start from. The gallon, quart, pint, cup and fluid ounce here are all US measures, not UK imperial. Everything runs in your browser and nothing you type is uploaded anywhere.
Common questions
How many millilitres are in a US cup?
One US cup is about 236.588 millilitres. Enter 1 and select cup to see it in millilitres, litres and fluid ounces at the same time.
How do I convert litres to US gallons?
Type your volume, select litre as the unit, and read the US gallon row. One US gallon is about 3.78541 litres, so one litre is roughly 0.264172 US gallons.
Are these US or UK (imperial) units?
The gallon, quart, pint, cup and fluid ounce are all US customary measures. UK imperial gallons and pints are larger, so do not use these values for imperial recipes.
Why do I see “—” instead of results?
That appears when the value box is empty or is not a valid number. Enter a finite number and the full conversion list appears instantly.
Are the values I type sent anywhere?
No. All conversions run entirely in your browser with JavaScript. Nothing you enter is uploaded or stored on a server.