1 kg/m³ equals exactly
0,001 kg/dm³
The kilogram per cubic meter (kg/m³) and the kilogram per cubic decimeter (kg/dm³) are both density units of the International System. Since 1 m³ = 1,000 dm³, and the cubic decimeter is exactly equal to one liter, kg/dm³ is numerically identical to kg/L: both return the same numerical value as g/cm³.
To convert a measurement from kg/m³ to kg/dm³, simply divide the value by 1,000:
To convert from kg/dm³ to kg/m³, perform the inverse operation, multiplying by 1,000:
kg/dm³ is less common than g/cm³ or kg/m³ in everyday language, but it appears in some technical and industrial contexts, especially when working with volumes expressed in liters or cubic decimeters (for example in industrial chemistry or tank management), where having density already on the same scale as volume simplifies calculations.