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 footage = length × width
For irregular rooms, divide the space into smaller rectangles
Calculate the square footage of each section
Add all section totals together
Round measurements to the nearest inch or foot if needed
Convert inches to feet before multiplying if necessary
Example: 12 feet × 10 feet = 120 square feet