Carpet Calculator
Carpet is priced by the square yard, so you need your room area plus 10% waste, divided by 9. Enter the room size to get square yards and cost.
How to measure for carpet
Multiply the room’s length by width for the area in square feet, then add 10% for trimming, seams, and doorways where the carpet continues. Measure to the widest points of the room so the roll covers any alcoves.
Why square yards
Carpet rolls are typically 12 feet wide, and the industry prices by the square yard. The calculator divides your square footage by 9 to match supplier quotes. If your room is wider than the roll, expect a seam and a little extra waste.
Comparing floor types
Carpet is the softest, cheapest underfoot option. For hard-surface rooms, compare the flooring calculator for planks or the tile calculator for tile.
Frequently asked
How do I calculate carpet in square yards?
Find the room area in square feet, add 10% for waste and seams, then divide by 9 to get square yards. A 180 sq ft room needs about 22 square yards.
Why is carpet sold by the square yard?
Carpet comes on rolls usually 12 feet wide, and the trade prices it per square yard. Dividing square feet by 9 converts to the unit your supplier quotes.
How much extra carpet should I order?
Add 10% for a simple room and more for stairs, hallways, or rooms wider than the roll, where seams and pattern matching waste material.