Last updated: March 2, 2026 by James Wilson

How to Calculate Carpet for a Room

Formula

Square yards = (Length × Width) ÷ 9

Carpet is sold by the square yard and comes in 12-foot or 15-foot wide rolls. Proper measurement minimizes seams and reduces waste.

When ordering, round up to account for seam placement and pattern matching. Add 10% for irregularly shaped rooms.

Common use cases:

  • Bedroom carpet installation
  • Living room carpeting
  • Whole-house carpet estimates

Frequently Asked Questions

JW

James Wilson

Licensed Professional Engineer, PE, MS Civil Engineering

James is a Licensed Professional Engineer with a Master's in Civil Engineering and over 12 years of experience in structural design and construction project management. He specializes in building calculations, material estimation, and physics-based engineering tools.

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