Carpet Calculator
Calculate the amount of carpet needed for a room, including waste factor and cost estimation.
Published by:
isCalculator Editorial Team
Was this calculator helpful?
How to use this tool?
How to Use the Carpet Calculator
This calculator helps you estimate the total carpet area needed (including waste) and optional cost. All measurements are in feet (ft).
- Enter Length and Width (in feet). Use positive numbers (e.g., 12.5).
- Set Waste Factor (default 10%). Typical range is 5–15% for cuts and pattern matching.
- Optional: Enter Cost per sq ft (e.g., 3.50). Leave blank to skip cost calculation.
- Click Calculate.
Results explained:
- Area = Length × Width (sq ft)
- Waste = Area × (Waste% / 100)
- Total Needed = Area + Waste
- Cost Estimate = Total × Cost per sq ft (shown if cost entered)
Tip: All inputs accept decimals. Use a waste factor of 0% for exact measurements.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
Measure the length and width of the room in feet. Multiply them to get the area. Add a waste factor of 5-15% for cuts and seams.
A waste factor of 10% is common for simple rooms. For rooms with many angles or patterns, use 15%.
Yes, enter the cost per square foot to get an estimated total cost.