Measure the length of the room in feet
Measure the width of the room in feet
Multiply the length by the width
Use the formula: square feet = length × width
For irregular rooms, divide the space into smaller rectangles
Measure each section separately
Calculate the square feet of each section
Add all section areas together
Round measurements to the nearest inch or decimal foot if needed
Include closets or alcoves only if you want them counted in the total area