Measure the length in feet
Measure the width in feet
Multiply length by width
Use the formula: square feet = length × width
If measurements are in inches, divide each by 12 first
If the area is not a rectangle, divide it into smaller shapes and add the square feet 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 use the same unit before calculating