Since density is mass / volume, the natural SI unit is kilogram / cubic meter.
You would use the SI unit of length, which is the meter (m), to measure a paper clip.
You would use the SI unit meter (m) to measure the length of a DVD case.
The SI unit of measure for electric charge is the Coulomb (C).
The SI unit of density is kilograms per cubic meter (kg/m^3), while the CGS unit of density is grams per cubic centimeter (g/cm^3).
The SI unit for density in liquids is kilograms per cubic meter (kg/m^3).
Density is equal to mass per unit volume. Its unit is kg/m3.
You would use the SI unit of length, which is the meter (m), to measure a paper clip.
meters
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
You would use the SI unit meter (m) to measure the length of a DVD case.
Standard International unit (SI unit)
Grams is the SI unit for weight
kg is the SI unit for mass
meters
The liter is classed as a non-SI unit accepted for use with the SI. Being one thousandth of a cubic meter, the liter is not a coherent unit of measure with respect to SI.
Celsius and Kelvins are the two scales that scientists use to measure temperature and the official SI unit for temperature is Celsius.
The international (SI) unit for mass is the kilogram.