Construction
Carpet Calculator
Estimate carpet area in square yards from room dimensions and a waste allowance.
- Free to use
- Runs in your browser
- Level B · Industry formula
- Last reviewed 2026-08-16
Calculator guide
How to use the Carpet Calculator
Estimate carpet area in square yards from room dimensions and a waste allowance. Enter the requested values and select Calculate. The result and supporting values are produced locally in your browser.
Formula
Worked example
A 20 ft × 15 ft room with 10% waste requires about 36.67 square yards of carpet.
What to keep in mind
- Carpet is often sold by square yard or by roll; seams and pattern matching can increase material needs.
- Measure irregular rooms in sections and add the sections before applying waste.
Methodology
This calculator uses deterministic arithmetic and performs the calculation locally in your browser. Verify assumptions, units, and source values for your specific use case.
Review standard: Level B · Industry formula. How calculator reviews work.
Frequently asked questions
What does this calculator calculate?
Estimate carpet area in square yards from room dimensions and a waste allowance.
How is the result calculated?
Required Carpet (sq yd) = Length × Width × (1 + Waste %) ÷ 9.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.