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
Measure each section separately
Calculate the square feet of each section
Add all sections together
For triangles, use the formula: square feet = 0.5 × base × height
For circles, use the formula: square feet = 3.1416 × radius × radius
Make sure all measurements are in feet before calculating