How to use the Carpet Calculator

Estimate carpet yardage and rough material cost for a rectangular room.

Calculation formula

Carpet required (yd²) = room length × room width × (1 + waste%) ÷ 9; material cost = yardage × price per yd².

Recommended steps

1. Enter values using the units shown beside each field.
2. Review whether the example assumptions match your situation.
3. Run the calculator and compare the key metrics.
4. Use the source data or official rates when precision matters.

Known limitations

Carpet rolls have fixed widths; seam placement, pile direction, padding and installation costs are excluded.