About This Calculator
This calculator helps you estimate the carpet area (usable space) from the built-up area by applying a deduction percentage, typically between 70% and 80% to account for walls and common areas.
How It Works
- Enter the built-up area.
- Select your preferred unit (default is square feet).
- Input the deduction percentage (typically 70–80%).
- The calculator multiplies the built-up area by the percentage to determine the carpet area.
Carpet Area = Built-up Area ×
Percentage100
Frequently Asked Questions
What is carpet area?
Carpet area is the usable floor area inside the walls of a unit, excluding inner wall thickness and shared/common spaces.
How is the deduction percentage chosen?
The percentage is based on design standards—most properties deduct 20–30% from the built-up area to estimate the carpet area.
Can I use any unit?
Yes, the calculator supports units such as square feet, square meters, and square yards. Results are shown using your selected unit.