Unit Converters
Volume Converter
Volume: volume Converter converts between volume units — litres, millilitres, gallons and cups — through a litre base. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
From your value plus the source and target units, Volume Converter computes the converted volume in the unit you choose via fixed, standard conversion ratios. No accounts, no uploads — just an instant way to convert a volume measurement between units such as litres, gallons, cups and millilitres.
Gallon, quart, pint, cup, fluid ounce, tablespoon and teaspoon use US liquid measures. One US gallon is 3.785411784 L; one cup is 16 tablespoons.
About this calculator
Volume is easiest to get wrong in the setup, not the arithmetic. Volume Converter converts between volume units — litres, millilitres, gallons and cups — through a litre base. It matters whenever the same quantity is expressed in two systems and a wrong factor silently breaks the answer. The worked example on this page (To convert 2 litres to millilitres, multiply by 1,000: 2 × 1000 = 2,000 ml . A US gallon is about 3.785 litres, so 1 gallon ≈ 3.785 L.) shows the full substitution; the calculator above runs the same working on your own numbers, in your browser, with nothing uploaded.
How to use
- Enter the volume value.
- Choose the From volume unit.
- Choose the To volume unit.
- Press Calculate to see the converted volume.
Why use Volume Converter
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Uses standard conversion factors where applicable. Check critical measurements before relying on the result.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it for engineering and physics work
Volume in lab and technical tasks
Use it when reading a spec sheet
Use it when standardising units in a report
Use it when a manual uses different units
Use it when comparing measurements
Technical notes
Volume Converter converts between volume units — litres, millilitres, gallons and cups — through a litre base.
Conversions use standard reference factors; for trade or engineering tolerances keep more decimal places than the display shows.
Nothing you type is uploaded — the calculation happens entirely on your device.
Worked example
To convert 2 litres to millilitres, multiply by 1,000: 2 × 1000 = 2,000 ml. A US gallon is about 3.785 litres, so 1 gallon ≈ 3.785 L.
FAQ
Are these US or imperial measures?
The cup, fluid ounce, pint, quart, and gallon here are US liquid measures.
Which volume units are supported?
Millilitres, litres, cubic metres, teaspoons, tablespoons, cups, fluid ounces, pints, quarts, and gallons.
Is 1 gallon exactly 3.78541 litres?
One US liquid gallon is 3.785411784 L; the tool shows it rounded for readability.
Does the Volume Converter send my data to a server?
No. The Volume Converter runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.