Density Converter
Convert between kg/m³, g/cm³, g/L, lb/ft³, and other density units.
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How to use this calculator
- 1
Enter the density value you want to convert.
- 2
Select the unit you are converting from (e.g. kg/m³).
- 3
Select the target unit (e.g. g/cm³).
- 4
The result appears instantly.
Frequently asked questions
What is the density of water?
Water has a density of approximately 1 g/cm³ (or 1,000 kg/m³) at 4°C. This is used as a reference: objects denser than 1 g/cm³ sink; lighter ones float.
How do I convert kg/m³ to g/cm³?
Divide by 1,000. For example, 1,000 kg/m³ = 1 g/cm³. Water's density in both units: 1,000 kg/m³ = 1.0 g/cm³.
What is the density of air?
At sea level and 15°C, dry air has a density of approximately 1.225 kg/m³ or 0.001225 g/cm³.
What is the densest naturally occurring element?
Osmium is the densest naturally occurring element at approximately 22,590 kg/m³ (22.59 g/cm³). Lead is 11,340 kg/m³ and gold is 19,300 kg/m³ for comparison.
Density unit conversion guide
What is density?
Density is mass per unit volume (ρ = m/V). The SI unit is kg/m³. In chemistry, g/cm³ (equivalent to g/mL) is more common. Water at 4°C has a density of exactly 1 g/cm³, making it the reference standard for specific gravity.
Key density reference values
Air: ~1.225 kg/m³ | Water: 1,000 kg/m³ | Aluminium: 2,700 kg/m³ | Steel: ~7,850 kg/m³ | Lead: 11,340 kg/m³ | Gold: 19,300 kg/m³ | Osmium: 22,590 kg/m³.
Practical uses of density conversion
Density conversions are needed in chemistry (concentration calculations), materials science (selecting materials for weight vs strength), fluid mechanics (buoyancy), food science (recipe adjustments), and shipping (calculating payload weights).
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →