DIY Cost Tools
Carpet Calculator
FLOORING CALCULATOR
Estimate carpet area, square yards, roll length, and material cost for a rectangular room.
Room area252 ft²
Area with allowance277.2 ft²
Square yards30.8 yd²
Equivalent roll length23.1 linear ft
Estimated carpet cost$1,078.00
How it works
Room area is increased by the entered allowance. Square feet convert to square yards by dividing by nine, and equivalent linear roll length divides adjusted area by roll width.
Formula
Adjusted area = length × width × (1 + allowance)
Square yards = adjusted square feet ÷ 9
Important limits
- Actual cutting plans depend on roll direction, seams, doorways, closets, stairs, and pattern repeat.
- Equivalent roll length is not a professional seam layout.
- Padding, installation, removal, transitions, and tax are not included.
Frequently asked questions
Why is carpet priced by square yard?
Many retailers use square yards; one square yard equals nine square feet.
Is 10% allowance always enough?
No. Complex rooms, patterned carpet, and seam direction may require more.
Review notes
Area conversions are exact; purchase layout should be confirmed against actual roll width and room plan. Last reviewed September 30, 2026.