Carpet Calculator

Calculate carpet in square yards, plus padding, tack strips, and installation materials. Includes cost estimates for carpet and installation.

Carpet is priced per square yard, not square foot

How to Use This Calculator

Carpet ordering requires careful calculation because carpet is sold by the square yard and comes in fixed widths. Getting the right amount prevents both shortages and costly overages.

  1. Measure each room's length and width at the longest/widest points in feet.
  2. Add all rooms that will receive the same carpet - ordering together reduces waste.
  3. Select the carpet width (12-foot is most common, 15-foot reduces seams in larger rooms).
  4. Include padding unless your carpet has it attached or you're recarpeting over existing pad.
  5. Enter your carpet price per square yard for cost estimates.

Why This Matters

Carpet significantly impacts a home's comfort, acoustics, and appearance. Accurate estimation ensures you order enough from the same dye lot (color can vary between lots) while minimizing waste. Because carpet comes in fixed widths, a professional installer can often calculate more efficient layouts that reduce your total cost.

  • Calculate square yards from room dimensions
  • Account for carpet width and seam placement
  • Include padding requirements
  • Estimate tack strips and seam tape needed
  • Budget for materials and installation

Worked Examples

Master Bedroom

A 15' x 18' master bedroom with 12-foot wide carpet.

Calculation: 270 sq ft / 9 = 30 sq yd + 10% waste = 33 sq yd
Result: Order 33 square yards carpet and padding, minimal seaming needed.

Whole House Installation

Three bedrooms (12x14, 11x12, 10x11) plus hallway (4x25).

Calculation: (168 + 132 + 110 + 100) = 510 sq ft / 9 = 57 sq yd + waste
Result: Order 65 square yards to allow for seams and doorway transitions.

Large Living Room

A 20' x 24' living room with 15-foot wide carpet.

Calculation: 480 sq ft / 9 = 53 sq yd + 10% = 58 sq yd
Result: 15-foot width reduces seaming; order 58 square yards.

Common Mistakes to Avoid

  • Confusing square feet with square yards - carpet is priced and sold by the square yard.
  • Not accounting for carpet width - fixed widths mean you often need more than exact room area.
  • Forgetting about seam placement - seams in high-traffic or visible areas affect appearance.
  • Skipping quality padding - cheap padding wears out carpet faster and reduces comfort.
  • Not ordering from the same dye lot - color variations between lots can be noticeable.

Frequently Asked Questions