Measure the length of the space in feet
Measure the width of the space in feet
Multiply length by width
Use the formula: square footage = length × width
For irregular shapes, divide the area into smaller rectangles
Calculate each rectangle’s square footage separately
Add the square footage of all sections together
For triangles, use the formula: square footage = 0.5 × base × height
For circles, use the formula: square footage = 3.1416 × radius × radius
Convert inches to feet before calculating if needed
Round to the nearest whole number if required