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The relationship between density, mass and volume can be expressed as the following formula:

• Mass is measured in grams.
•  Volume is measured in cubic millilitres. 
  

Finding the density of an irregularly shaped solid

To find the density of an irregularly shaped solid we need to do practical work. The volume can be found out by measuring the volume of displaced liquid by an object. We can find the volume of these solids with the following steps:

1. Weigh the object to find its mass as usual. 
   
2. Find the object's volume.

Pouring water into two measuring cylinders is a method of finding the displacement. The reading must be taken at the lowest level of meniscus (the curved upper surface of a liquid) or curved surface of the liquid.
To find an object's volume, we need to do the following practical: