Carpet Calculator
Estimate carpet in square feet and square yards.
Enter your room dimensions to get the carpet area in square feet and square yards. Carpet is usually priced and sold by the square yard, so both figures are shown. A 10% waste allowance covers seams and trimming.
How it works
Area is length × width. Add a waste allowance, then divide by 9 to convert square feet to square yards. Carpet comes in fixed roll widths (commonly 12 ft), so real-world waste can be higher on awkward room shapes.
Frequently asked questions
How much carpet do I need?
Multiply room length by width, add about 10% for waste, then divide by 9 for square yards. A 12×15 room is 180 sq ft, or roughly 22 square yards with waste.
Why is carpet sold by the square yard?
It's an industry convention. One square yard equals 9 square feet, so divide your square footage by 9 to compare prices.
How much waste should I allow for carpet?
Around 10% is typical, but fixed roll widths and room shape can push it higher. Have an installer confirm before ordering.
Is this calculator free and private?
Yes. Every CubicCabin calculator runs entirely in your browser, so the numbers you enter are never uploaded or stored. There's no sign-up, no limits, and it keeps working even if you lose connection after the page loads.