Calculating the volume of a rectangular prism is easy once you know the length, height and width. If you want to know how to calculate the volume of a rectangular prism, follow these simple steps.
Steps
Step 1. Find out the length of the rectangular prism
Length is the longest side of the prism base rectangle.
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Ex: Length = 5 cm.
Calculate the Volume of a Rectangular Prism Step 2 Step 2. Find out the width of the rectangular prism
The width is the shorter side of the prism base rectangle.
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Ex: Width = 4 cm.
Calculate the Volume of a Rectangular Prism Step 3 Step 3. Find out the height of the rectangular prism
The height is the part of the polygon that rises. Think of it as what turns a flat rectangle into a three-dimensional shape.
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Ex: Height = 3 cm.
Calculate the Volume of a Rectangular Prism Step 4 Step 4. Multiply the length, width, and height together
The order in which you multiply them doesn't matter, the result won't change. The formula for calculating the volume of a rectangular prism is therefore: Volume = Length * Height * Width, or V = Lu * A * La.
Ex: V = 5cm * 4cm * 3cm = 60cm
Calculate the Volume of a Rectangular Prism Step 5 Step 5. Express the result in cubic units
Since you are calculating the volume, you are dealing with a three-dimensional space. Regardless of the unit of measurement of the result (centimeters, inches, etc.), this must be expressed in cubic units.
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60 will become 60 cm3.
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