Kilogram per Cubic Meter (kg/m³)
The kilogram per cubic metre (kg/m³) is the SI unit of density. Water near room temperature is about 998 kg/m³ and air at sea level about 1.2 kg/m³.
Symbol: kg/m³ (ASCII: kg/m3)
Quantity: density (mass per unit volume) and mass concentration
SI relation: kg/m³ is the coherent SI unit of density.
Derivation: 1 kg/m³ = 1 kg ÷ 1 m³
Exact: yes, by definition
Same quantity as gram per liter (g/L) : the factor between them is exactly 1.
Typical uses
- Fluid properties in engineering calculations
- Material datasheets (steel ≈ 7850 kg/m³)
- Air density for fan and flow calculations
Convert kilograms per cubic meter to other units
| Conversion | 1 kg/m³ equals | Reverse |
|---|---|---|
| kilogram per cubic meter to gram per cubic centimeter | 0.001 g/cm³ | gram per cubic centimeter to kilogram per cubic meter |
| kilogram per cubic meter to milligram per liter | 1000 mg/L | milligram per liter to kilogram per cubic meter |
| kilogram per cubic meter to pound per cubic foot | 0.06242796058 lb/ft³ | pound per cubic foot to kilogram per cubic meter |
| kilogram per cubic meter to pound per gallon | 0.008345404452 lb/gal | pound per gallon to kilogram per cubic meter |
| kilogram per cubic meter to kilogram per liter | 0.001 kg/L | kilogram per liter to kilogram per cubic meter |
| kilogram per cubic meter to gram per liter | 1 g/L | gram per liter to kilogram per cubic meter |
| kilogram per cubic meter to pound per cubic inch | 0.000036127292 lb/in³ | pound per cubic inch to kilogram per cubic meter |
Open the Density Converter to convert any value between all units.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2, coherent derived units.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Kilogram per Cubic Meter (kg/m³). Retrieved October 17, 2026, from https://scientificconverters.com/units/kilogram-per-cubic-meter/
IEEE
Scientific Converters, "Kilogram per Cubic Meter (kg/m³)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/kilogram-per-cubic-meter/