🧊 Density Calculator (ρ = m/V)

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Enter details

Pick what you want to find. The box for that quantity is ignored, so you can leave any number in it.
1 cm³ = 1 mL.
Density (g/cm³)
1.03
Density (kg/m³)
1,030
Mass (g)
1,030
Volume (cm³)
1,000

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📘 About the Density

Density tells you how much mass is packed into a given volume. This density calculator finds density, mass or volume when you know the other two, using ρ = m ÷ V.

Work in grams and cubic centimetres (1 cm³ = 1 mL). The density is shown in g/cm³ and in the SI unit kg/m³. Anything denser than water (1 g/cm³) sinks in it; anything less dense floats.

🧮 Formula

Density
ρ = m ÷ V
Mass
m = ρ × V
Volume
V = m ÷ ρ

Where

  • ρ (rho) = density (g/cm³ or kg/m³)
  • m = mass (g)
  • V = volume (cm³)
To find the volume of an irregular object, lower it into a measuring cylinder of water and read how much the level rises.

✏️ Worked examples

Block of aluminium

You enter
FindDensity
Mass270 g
Volume100 cm³
You get
Density (g/cm³)2.7
Density (kg/m³)2,700
Mass (g)270
Volume (cm³)100

270 g in 100 cm³ is 2.7 g/cm³ (2,700 kg/m³), the density of aluminium.

Try this example →

Mass of 1 litre of milk

You enter
FindMass
Volume1,000 cm³
Density1.03 g/cm³
You get
Density (g/cm³)1.03
Density (kg/m³)1,030
Mass (g)1,030
Volume (cm³)1,000

1,000 cm³ of milk at 1.03 g/cm³ has a mass of 1,030 g.

Try this example →

🧭 How to use this calculator

What you enter

  • FindPick what you want to find. The box for that quantity is ignored, so you can leave any number in it.
  • Mass (g)
  • Volume (cm³)1 cm³ = 1 mL.
  • Density (g/cm³)

What you get

  • Density (g/cm³)
  • Density (kg/m³)
  • Mass (g)
  • Volume (cm³)

💡 Densities of common substances

  • Air: 0.0012 g/cm³
  • Wood (pine): about 0.5 g/cm³
  • Ice: 0.92 g/cm³
  • Water: 1.00 g/cm³
  • Aluminium: 2.70 g/cm³
  • Iron: 7.87 g/cm³
  • Copper: 8.96 g/cm³
  • Gold: 19.3 g/cm³

❓ Frequently asked questions

What is the formula for density?

Density = mass ÷ volume (ρ = m/V).

What is the density of water?

About 1 g/cm³, which is 1,000 kg/m³ (exactly 0.99997 g/cm³ at 4 °C).

How do I convert g/cm³ to kg/m³?

Multiply by 1,000. For example, 2.7 g/cm³ = 2,700 kg/m³.

Why does ice float?

Ice (0.92 g/cm³) is less dense than liquid water (1.00 g/cm³).