Enter your room dimensions to find out how much carpet to buy — in square yards and square feet, with waste and cost.
Carpet is priced and sold by the square yard (1 yd² = 9 sq ft), unlike hard flooring which is sold by the square foot or box. This calculator converts your room dimensions to square yards and adds a waste allowance for cuts, seams, and pattern matching.
For simple rectangular rooms with no pattern: 5–10%. For rooms with angles, stairs, or a carpet with a pattern repeat: 15–20%. It's better to buy slightly more — carpet dye lots vary and you won't be able to match later.