Measure the length of the space in feet
Measure the width of the space in feet
Multiply length by width
Use the formula: square feet = length × width
For irregular shapes, divide the area into smaller rectangles
Calculate the square feet of each section
Add the square feet of all sections together
If measurements are in inches, convert inches to feet first by dividing by 12
If the space is a triangle, use the formula: square feet = 0.5 × base × height
If the space is a circle, use the formula: square feet = 3.1416 × radius × radius