How many square feet is a 21x1 room?

Here we will show you how to calculate the square feet of a 21x1 room or area. We will also provide you with a tool where you can enter the price per square foot for your project to get the total cost.

This calculator can be used to calculate the square footage of a building, floors, walls, etc.

To calculate the square feet of a square or rectangular room or area, you simply multiply the length by the width. Below is the formula, the math, and the answer.

Length feet × Width feet = Square Feet
21 × 1 = 21
21x1 room = 21 square feet

Note that square feet can be shortened to sq ft or simply ft². Therefore, the answer above can written as 21 ft².

Do you have a project where you need to calculate the cost of work needed for a 21x1 foot room or area? It may be that you are building a 21x1 room, laying new carpet or flooring, painting, installing tile, etc.

Regardless, if you have the price per square foot for your 21x1 feet project, then enter it below to calculate the total cost of your project.

Square Footage Calculator
To get the square footage of another room, building, area, etc., enter the dimensions in feet below.

How many square feet is a 21x2 room?
Here is the square footage for a different room with different dimensions.