Measure the length of the space in feet
Measure the width of the space in feet
Multiply the length by the width
Use the formula: square feet = length × width
For irregular shapes, divide the area into smaller rectangles
Calculate the square feet of each rectangle
Add the results together
If measurements are in inches, divide by 12 to convert to feet before multiplying
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