Density Calculator
Calculate density from mass and volume, or solve for mass or volume. Shows results in kg/m³ and g/cm³ and compares against common materials.
Solve For
kg
Mass Unit
Volume Unit
m³
Results
Density
1000 kg/m³
1.00 g/cm³
Mass
1000.000 kg
Volume
1.0000 m³
Closest Material
Water
~1,000 kg/m³
Water comparison
Floats on water
How is Density Calculated?
Density is mass per unit volume. It tells you how much matter is packed into a given space and is a key physical property that lets you identify materials.
kg/m³ ÷ 1000 = g/cm³
Example
A 1 kg block occupying 1 litre (0.001 m³) has a density of 1 ÷ 0.001 = 1000 kg/m³, or 1 g/cm³ — exactly the density of water. Compare your result against the material table to guess what a sample might be made of.
Material Density Reference (kg/m³)
Iron: ~7870
Aluminum: ~2700
Gold: ~19300
Common Use Cases
- Identifying the likely material of an unknown sample by its density.
- Checking whether an object will float or sink relative to water.
- Converting between mass and volume for engineering or shipping.
- Quality control verification of metals and fluids.
FAQs
How do I convert kg/m³ to g/cm³?
Divide by 1000. Because 1 kg = 1000 g and 1 m³ = 1,000,000 cm³, a density of 1000 kg/m³ equals 1 g/cm³. This calculator shows both values.
Does temperature affect density?
Yes. Most materials expand when heated, spreading the same mass over a larger volume and thus lowering density. Water is a notable exception between 0°C and 4°C, where it becomes denser as it warms. Values here are typical room-temperature densities.
How can I tell what material something is?
Measure its mass and volume, compute the density, then compare it to the reference table. The calculator flags which of the common materials your result is closest to, though many materials share similar densities so it's not definitive on its own.