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 each section’s square footage
Add all section square footages together
For triangles, use the formula: square feet = 0.5 × base × height
For circles, use the formula: square feet = π × radius²
Convert inches to feet before calculating if needed
Divide square inches by 144 to get square feet
Use a tape measure or laser measure for accuracy