15 ft x 12 ft
- Area with waste
- 198 ft2
- Linear feet at roll width
- 16.5 ft
- Roll width used
- 12 ft
Carpet orders depend heavily on seam placement, pattern direction, stairs, closets, and installer layout.
Carpet Calculator
Use this free carpet calculator to estimate carpet square yards, adjusted square feet, and linear feet from room size and roll width.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Multiply room length by width for square feet.
- Add waste for trimming, seams, and layout.
- Divide by 9 for square yards and by roll width for approximate linear feet.
How to use the carpet calculator
- Enter room length, room width, roll width, and waste percent.
- Press Estimate carpet to see square yards, adjusted square feet, and approximate roll length.
- Use this for rough planning before seam layout.
- Installer layout, pattern direction, stairs, closets, and roll width can change the order.
Common uses
Estimate carpet for a simple rectangular room.
Convert square feet into square yards.
Estimate linear feet from common roll width.
Add waste before talking with an installer.
Examples
Square yards and linear feet
Adjusted carpet area
Rough carpet order
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Carpet Calculator?
Use it when your task matches one of these common needs: Estimate carpet for a simple rectangular room. Convert square feet into square yards. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Carpet Calculator doing with my inputs?
In plain language: The calculator multiplies room length by width, adds waste, divides by 9 for square yards, and divides by roll width for approximate linear feet. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
Carpet orders depend on seam placement, stairs, closets, pile direction, pattern matching, roll width, and installer layout. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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