Roof Calculator: Accurate Cost Estimates

This tool calculates the total area of your roof based on your input measurements.

How to Use the Roof Calculator

To calculate the roof area, follow these steps:

  1. Enter the length of your roof in feet in the “Length” field.
  2. Enter the width of your roof in feet in the “Width” field.
  3. Enter the pitch of your roof. The pitch is the rise over a 12-inch run (e.g., a 6:12 pitch means a 6-inch rise over 12 inches of run).
  4. Click the “Calculate” button.
  5. The result will be displayed in the “Result” field, representing the actual area of your roof in square feet.

How It Calculates the Results

The roof calculator uses the length and width to calculate the basic area of the roof. The pitch multiplier is calculated using the Pythagorean theorem to take the slope into account. This multiplier is then applied to the basic area to give the actual roof area.

Limitations

  • This calculator assumes a simple, rectangular roof shape.
  • It does not account for any additional roof features like dormers, valleys, or complex rooflines.
  • The results are approximate and should be verified by a professional for accuracy before making any construction decisions.