Density Converter

Density Converter moves between the metric and imperial expressions of mass per unit volume, which matters whenever a material specification and a measurement are in different systems.

Water is the natural reference point and makes the units easy to sanity-check. Water is 1,000 kg per cubic metre, which is 1 gram per cubic centimetre, 1 kilogram per litre and about 62.43 pounds per cubic foot. Specific gravity is simply density relative to water, so water is 1, steel about 7.85 and pine about 0.5 -- which is why wood floats.

The practical use is converting between a weight and a volume. Multiply density by volume to get mass; divide mass by density to get volume. That is how a tank of fuel becomes a weight for an aircraft load sheet, and how a concrete volume becomes a delivery weight.

The page shows its working, not just its answer. Where there is a formula it is printed with your own numbers substituted in, so you can check the result rather than take it on trust -- which is the difference between a calculator you can use for something that matters and one you cannot.

Everything runs inside your browser. What you type is never uploaded, never logged and never stored, and the calculator keeps working if your connection drops after the page has loaded.

• Shows result, to twelve digits, conversion factor, the other way and in scientific notation together, so you are not running it twice
• A results table you can read across
• Updates as you type, with no button to press and no page reload
• Copy the result in one click
• Free, no sign-up, and it runs entirely in your browser

The density converter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Converting a material density between metric and imperial
• Finding specific gravity from a density figure
• Converting a fuel density for a weight calculation
• Checking whether a material will float