Kilograms measure mass and milliliters measure volume — converting between them depends on the substance’s density, defaulting to water.
How it works
Kilograms are converted to grams, then divided by the density in grams per milliliter to give the volume in milliliters.
What this does not include
This does not include the reverse direction — for converting milliliters to kilograms, use this site’s dedicated ml to kg calculator instead.
How to use this calculator
- Enter the mass in kilograms and, if not water, the substance’s density.
Frequently asked questions
Why isn’t 1 kg always 1000 mL?
That’s only true for water (or anything with the same density) — denser substances take up less volume per kilogram, and lighter substances take up more.
Where do I find a substance’s density?
Density reference tables are widely available online for common liquids — cooking oil, milk, and alcohol are all somewhat less dense than water, for example.
Is 1 kg of water exactly 1000 mL?
Very close — water’s density is almost exactly 1 g/mL at typical room temperature, which is why this calculator defaults to that value.
