How to Calculate Rectangular Prism Volume

Understanding how to calculate the volume of a rectangular prism (also called a cuboid or box) is important for various applications in mathematics, engineering, and everyday life.

Rectangular Prism Volume Formula

V = l × w × h

Where:

  • V = Volume
  • l = Length
  • w = Width
  • h = Height
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Step-by-Step Guide

  1. Identify the dimensions

    Measure the length, width, and height of the rectangular prism.

  2. Use the correct formula

    Apply the volume formula V = l × w × h.

  3. Calculate the result

    Multiply the three dimensions together to find the volume.

  4. Verify your answer

    Check that your final volume is in cubic units (e.g., cm³, m³, in³).

Example Calculation

Problem: Calculate the volume of a rectangular box with length 8 cm, width 5 cm, and height 3 cm.

Given: l = 8 cm, w = 5 cm, h = 3 cm

Solution:

  1. Apply the formula: V = l × w × h
  2. Substitute the values: V = 8 × 5 × 3
  3. Compute the result: V = 120 cm³

Answer: The volume is 120 cubic centimeters (cm³).

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