How to Calculate the Square Feet of a Rectangle

By Michael Keenan; Updated April 24, 2017
A calculator is useful in figuring the square footage of a rectangle.

The square footage of a rectangle measures the area. You might need to calculate the square footage of a rectangle to find the size of a room or the amount of sod you need for putting grass in your yard. Once you know the formula for finding the area of a rectangle, calculating the square footage is a breeze.

Measure the length of the rectangle in feet with a measuring tape.

Measure the width of the rectangle in feet with a measuring tape.

Multiply the length times the width to find the square footage of the rectangle. For example, if the length equals 3 feet and the width equals 2 feet, multiply 3 feet by 2 feet to get 6 square feet.

About the Author

Mark Kennan is a writer based in the Kansas City area, specializing in personal finance and business topics. He has been writing since 2009 and has been published by "Quicken," "TurboTax," and "The Motley Fool."