Free Volume Converter
Convert litres, millilitres, gallons, quarts, cups and other volume units.
What is the Volume Converter?
Convert litres, millilitres, gallons, quarts, cups and other volume units.
Enter an amount and pick the units. The US liquid gallon is exactly 3.785411784 litres, and the tool shows the converted value instantly.
Quick, reliable engineering arithmetic saves time on site and in the workshop. These tools show their working so you can check the result.
How to use the Volume Converter
Using the volume converter takes a minute or two. Your entries are saved in this browser, so you can come back later and carry on.
Step 1
Enter your values, choosing the units you are working in.
Step 2
Read the result and the supporting numbers shown beneath it.
Step 3
Check the result against a second method or a reference table before you rely on it.
Tips for better results
US and imperial gallons, pints and cups differ, so check which system a recipe or fuel figure uses.
Keep units consistent from start to finish.
These tools are for estimates. Safety critical designs need a qualified engineer.
Privacy and where your data goes
Everything you type into the volume converter stays on your own device. Zapxa does not receive your numbers or documents. If you clear your browser data, your saved entries will be removed, so download a PDF of anything you want to keep.
Frequently asked questions
How many litres are in a US gallon?
Exactly 3.785411784 litres.
How many millilitres are in a litre?
1,000 millilitres.
Is the volume converter free?
Yes. It is free to use with no signup, no watermark and no usage limits.
Is my data private?
Yes. Your inputs are processed in your browser and saved only in its local storage. They are not uploaded to our servers.
Does it work on mobile?
Yes. Zapxa works on phones, tablets and desktops. Use the print button or download a PDF to keep a copy.
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