Density decides whether things float: objects denser than water (1,000 kg/m³) sink.
How to use the Density Calculator
- Mass
- Volume
- Want to work backwards? Type a value into Density and Volume is calculated for you.
Results update as you type, and every field accepts the units shown in its menu.
How it works
Divide mass by volume. Specific gravity compares the density with water at 4 °C.
Inputs explained
| Field | What to enter |
|---|---|
| Mass | Units: kg, lb, g, oz, st |
| Volume | Units: m³, L, ft³, yd³, US gal |
What each result means
- Density = [Mass] ÷ [Volume]
- Specific gravity = [Density] ÷ 1000
Example values
How the main result changes when Volume changes and everything else stays at the example values above:
| Volume (m³) | Density (kg/m³) |
|---|---|
| 0.0005 | 5,400 |
| 0.0008 | 3,600 |
| 0.001 | 2,700 |
| 0.0013 | 2,160 |
| 0.0015 | 1,800 |
| 0.002 | 1,350 |
Formula
ρ = m ÷ VWorked example
Inputs — Mass: 2.7 kg; Volume: 0.001 m³.
Results — Density = 2,700 kg/m³; Specific gravity = 2.7.
Frequently asked questions
What has a density of 2,700 kg/m³?
Aluminium.
Does density change with temperature?
Yes, most materials expand and become less dense when heated.
What formula does the Density Calculator use?
ρ = m ÷ V.
Can I work backwards from the result?
Yes. Type the result you want into Density and the calculator finds the matching volume.