Density Converter
Convert density between kg/m³, g/cm³, g/mL, lb/ft³, and lb/in³.
How it works
Density is mass packed into a volume, and it appears in a jumble of units depending on the field — kg/m³ in physics, g/cm³ in chemistry, lb/ft³ in construction and shipping.
A couple of relationships tie them together neatly: one g/cm³ equals exactly 1000 kg/m³ and is the same as one g/mL, which is why water sits at a tidy 1 g/cm³.
The tool converts across all of them at once, handy for comparing material specs, working out shipping weights, or checking whether something floats.
Frequently asked questions
How do I use this converter?
Enter a value and choose the unit you are starting from. The tool instantly shows the equivalent in every other density unit, so there is nothing to submit.
Are the conversions exact?
They use standard published conversion factors, so they are accurate for everyday and technical use. Results are rounded for readability, not because the math is approximate.
Can I convert in either direction?
Yes. Pick any unit as your starting point and read off the others — the conversion works both ways.