Density Calculator
Calculate density, mass, and volume. Convert between units like kg/m³, g/cm³, and lb/ft³. Includes density of water and common materials.
Density Formula
Density is defined as mass per unit volume. It is a key concept in physics and chemistry.
ρ = m / V
- Density (ρ - rho): How compact the substance is. Common units: kg/m³, g/cm³.
- Mass (m): The amount of matter in the object. Common units: kg, g, lb.
- Volume (V): The 3D space occupied by the object. Common units: m³, cm³, L.
Specific Gravity
Specific Gravity is the ratio of the density of a substance to the density of water (1000 kg/m³). If a substance has a specific gravity greater than 1, it will sink in water. If less than 1, it will float.
Common Density Values
- Water: 1,000 kg/m³ or 1.0 g/cm³
- Air: 1.2 kg/m³ (at sea level)
- Gold: 19,300 kg/m³
- Steel: 7,850 kg/m³
- Concrete: 2,400 kg/m³
? Frequently Asked Questions
To find density, measure the mass and volume of an object, then divide the mass by the volume (Density = Mass ÷ Volume).
The density of water is 1 g/cm³ (gram per cubic centimeter) or 1000 kg/m³.
Multiply by 1000. For example, the density of aluminum is 2.7 g/cm³, which equals 2700 kg/m³.