About the Density Converter
Density Converter changes a density between kilograms per cubic metre, grams per cubic centimetre, grams per litre, kilograms per litre, pounds per cubic foot, pounds per cubic inch, pounds per US gallon and ounces per cubic inch. Enter a value, choose its unit and read every other unit. It suits materials and shipping data, chemistry and physics homework, cooking and fuel, and any data sheet that uses a different unit system from the one you work in.
Updated October 2026
How to use the Density Converter
- 1Type the a density you want to convert.
- 2Choose the unit it is in from the From unit list.
- 3Read the result in every other unit straight away.
- 4Press Copy to keep the answer, or change the number to try another.
When you need a a density converter
Density Converter changes a density between kilograms per cubic metre, grams per cubic centimetre, grams per litre, kilograms per litre, pounds per cubic foot, pounds per cubic inch, pounds per US gallon and ounces per cubic inch. Density is mass divided by volume, so the same material has the same density whatever the amount. Steel is about 7.85 g/cm³, aluminium 2.70, water 1.00, ice 0.92 and air about 0.0012. A material with a density below 1 g/cm³ floats in water.
Units and what they mean
Because 1 g/cm³ equals 1 kg/l, 1,000 kg/m³ and about 62.43 lb/ft³, you can move quickly between lab and building units. For example, 2,400 kg/m³ for concrete is 2.4 g/cm³ or about 150 lb/ft³.
- Kilograms per cubic metre: the SI unit, and 1,000 for water
- Grams per cubic centimetre: the usual lab unit, equal to kg/l
- Pounds per cubic foot: common for building materials and soil
- Pounds per US gallon: used for fuels, paints and liquids in the US
Tips for accurate results
If you know the mass and the volume use the Density Calculator to find the density, and the Volume Calculator to find a volume from the shape. For gases the density depends on pressure and temperature, so state those too.
Round only at the end of a calculation. If you convert and then convert again, keep the full number in between so small errors do not add up.
Related conversions
Specific gravity is the density relative to water and has no unit, which is why it matches the g/cm³ figure. Related tools: Density Calculator, Volume Calculator, Weight Converter, Volume Converter and Buoyancy Calculator.
Features
- 8 units in one list
- Every result shown at once
- Exact factors, no rounding until you read it
- Works with decimals and negative-free values
- Copy button for the answer
- Calculated in your browser, so nothing is uploaded.
Frequently asked questions
How do I convert a density?
Type the number, pick the unit you start with and read the answer in every other unit below. Each unit is stored as an exact factor of one base unit, so a result is the number times its factor divided by the target unit's factor.
What is the density of water?
About 1 g/cm³, which is 1,000 kg/m³ or 62.43 lb/ft³ at about 4 °C.
How do I convert g/cm³ to kg/m³?
Multiply by 1,000.
Is kg/l the same as g/cm³?
Yes, they are equal, because a litre is 1,000 cm³ and a kilogram is 1,000 grams.
Is the result exact?
The factors used are the official or standard definitions, so the maths is exact. The page rounds what it shows to about 10 significant digits so numbers stay readable.
Does it work on my phone?
Yes. The page is built for small screens, with large inputs and a list of units you can scroll.
Is anything sent to a server?
No. The conversion is plain arithmetic in your browser, so nothing you type leaves your device.