# How to Calculate the Density of an Object

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This article will quickly show you how to calculate the density of an object. Density is basically a ratio that tells you how much matter is packed into a particular space or object. The SI unit for density is kilograms per cubic metre (kg/m³).

### Things You'll Need

• calculator
• In order to calculate density you must first determine the volume of the object using the following formula (if the object is square or rectangular shaped, if not a modification of the volume formula must be used):
v = l w h
Where:
v = volume (expressed in cubic units, such as cm³, or in mL)
l = length
w = width
h = height

• Determine the mass of the object that you want to calculate density.

• Now, use the following formula to calculate density:
d = m / v

Where:
d = density
m = mass
v = volume

• The SI (International System of Units) unit for density is kilograms per cubic meter (kg/m³). For example:
you have an object with a volume of 225 m³ and a mass of 370 kilograms. Therefore:
d = 370/225
d = 1.64 kg/m³

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