Measure the length of the room in feet
Measure the width of the room in feet
Multiply the length by the width
Use the result as the square footage
For irregular rooms, divide the room 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
If measuring in inches, convert to feet before multiplying
For triangular areas, multiply base by height and divide by 2
For circular areas, use pi times radius squared