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 footage = length × width
For irregular spaces, divide the area into smaller rectangles
Find the square footage of each section
Add all section areas together
For triangular spaces, use the formula: square footage = 0.5 × base × height
For circular spaces, use the formula: square footage = π × radius²
Convert inches to feet before calculating if needed
Round the final result to the nearest whole number if desired