Things You'll Need
Instructions
1Measure your room's width and length.
2
Convert feet and inches into feet with decimals. Take the inches that don't make a full foot and divide them by 12 to get your decimal. For example, a room that is 10 feet 6 inches long will be 10.5 feet.
3
Multiply the width and the length of the room to get its square footage. A 10.5-by-10.5-foot room is 110.25 square feet.
4
Once you calculate the square footage, you can calculate the decimals back into inches. Take the decimal number and multiply it by 12 to get the number of inches. From our example, 110.25 square feet is 110 feet 3 inches.