When purchasing new flooring or wallpaper for a room, you need to know the square footage of the floors or walls. When ordering landscaping material for your yard, you need to know the square footage of the spaces you want to fill. No matter the size or shape of the area you need to measure, you can easily calculate square footage by performing some simple calculations. Armed with a thorough understanding of how to calculate square footage, you will be able to make accurate measurements for many home improvement materials, including carpeting, paint and tile.

### Things You'll Need

- Tape measure

- Calculator

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## Square or Rectangular Areas

Stretch your tape measure across the width of the area you wish to measure. Read the measurement in feet. This number will be your width measurement.

Stretch the tape measure across the length of the area you wish to measure. Read the measurement in feet. This number will be your length measurement.

Multiply the measured width by the measured length. The resulting product is the square footage of your square-shaped or rectangle-shaped area.

## Triangular Areas

Stretch your tape measure across one edge of the triangle-shaped area you wish to measure. Read the measurement in feet. This will be the measurement of the base of your triangle.

Set the end of the tape measure at the base of the triangle-shaped area and stretch it across the height of the triangle. This measurement will be the height of your triangle.

Multiply the measured base by the measured height. Then divide your calculated product by two. The resulting number will be the square footage of your triangle-shaped area.

## Circular Areas

Measure in feet across the widest width of your circle-shaped area. Read the measurement in feet. This number is the circle's diameter.

Multiply the measured diameter by itself. Then, multiply this calculated product by 3.14.

Divide your calculated result from the previous step by four. This number is the square footage of your circle-shaped area.