Complete guide: Volume
Updated:
One liter contains 1,000 milliliters and one cubic meter 1,000 liters. A cubic centimeter equals one milliliter. This measures capacity, not mass: a liter of oil and a liter of water do not necessarily weigh the same.
The US liquid gallon is 3.785411784 liters; the imperial gallon is 4.54609 liters. Their fluid ounces are also distinguished. The US cup used here is 236.5882365 mL; the metric cup is 250 mL. Recipes may define other cups: check their reference.
Equivalences use internal precision and display up to ten significant digits. Very small quantities use scientific notation so they do not appear to be zero. Changing units does not change the object or replace a real measurement.
Sources and conversion conventions
Document review: 2026-10-24
How it works
- 1Select units or the applicable reference.
- 2Enter the quantity or size you want to compare.
- 3Check the breakdown and equivalence conventions.
Frequently asked questions
Can different physical quantities be converted?
No. Each converter keeps one physical quantity. Converting mass to volume requires the substance's density.
Can I share a conversion with its values?
Yes. The link retains quantity, units and all entered options; recipients can reproduce the result and edit the inputs.