Roof Size Calculator

Use this tool to easily measure the size of your roof.

Enter length of roof (meters): Enter width of roof (meters): Enter pitch of roof (degrees): Enter overhang (meters, optional): Result (sq meters):

How to Use the Roof Size Calculator

1. Enter the length and width of your roof in meters.

2. Enter the pitch of your roof in degrees.

3. Optionally, enter the overhang in meters.

4. Click the ‘Calculate’ button to get the roof size in square meters.

How it Calculates the Results

The roof size is calculated using the dimensions provided. The area computation includes an optional overhang. Note that the pitch of the roof influences the total area and is factored into the calculation:

area = (length + 2 * overhang) * (width + 2 * overhang) / cos(pitch in radians)

Limitations

This calculator assumes a simple rectangular roof shape and may not be accurate for complex roof geometries. For more precise measurements, especially for roofs with multiple slopes and angles, consider consulting a professional.

Use Cases for This Calculator

Calculating Roof Area

To calculate your roof size, simply input the length and width of your roof into the calculator. The script will then multiply the length by the width to give you the total area of your roof in square feet.

Estimating Shingle Quantity

If you are planning to install shingles, this calculator will help you estimate the quantity needed. Input the type of shingle you plan to use and the calculator will factor in the roof slope to determine the shingle quantity required.

Accounting for Pitch Factor

Input the roof pitch angle into the calculator to account for the pitch factor. The steeper the roof pitch, the more materials you will need. This feature ensures an accurate estimation of materials needed for your roof.

Calculating Waste Percentage

The calculator will also help you determine the waste percentage for your roofing project. Input the percentage of waste you expect and the script will calculate the additional materials needed to account for waste during installation.

Comparing Different Roofing Materials

Explore different roofing material options by inputting their respective costs per square foot into the calculator. You can then compare the total cost of each material based on your roof size to make an informed decision.

Considering Multiple Roof Sections

If your roof has multiple sections with varying dimensions, input each section’s length and width separately. The script will calculate the total combined area of all sections to provide an accurate estimate.

Adjusting Units of Measurement

Switch between different units of measurement, such as feet and meters, to ensure the calculator aligns with your preferred unit. This flexibility makes it easy to work with measurements in the unit you are most comfortable with.

Factoring in Ridge and Eave Overhangs

Include the measurements of any ridge or eave overhangs in the calculator to accurately calculate the total roof area, including these overhangs. This ensures you have a complete picture of the materials needed for the entire roof structure.

Accounting for Roof Obstacles

If your roof has chimneys, skylights, or other obstacles, input their dimensions into the calculator. The script will adjust the total roof area calculation to accommodate these obstacles, giving you a precise estimate of materials required.

Generating Detailed Report

Upon completing the calculations, the script will generate a detailed report that summarizes the total roof area, material estimates, waste percentage, and cost comparisons if different materials were considered. This report provides a comprehensive overview of your roofing project.