Common Core Math Vocabulary

Cubic Unit - Definition with Examples

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What is a cubic unit? 
In geometry, cubic units can be defined as the units used to measure volume. The volume of a unit cube whose length, width and height are 1 unit each is 1 cubic unit.
 

Here, the rectangular prism is made up of smaller unit cubes. The length, width and height of the rectangular prism can be measured by counting the number of unit cubes. The volume is then determined in cubic units. 

Volume of a Rectangular prism of unit cubes in cubic units

Some examples of cubic units in metric units are cubic meters, cubic centimeters, and in customary units are cubic inches, cubic feet. 

  Fun Facts

  • All 6 faces of a cubic unit are square, and all its 12 edges measure one unit each in length.
 

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While solving word problems on finding the volume, emphasize on the how the single unit of length, width or height turns into cubic units. 
 

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