Roofing Calculator
Estimate roof area from the building footprint and pitch.
Result
Results are estimates for general information only and are not professional advice.
Estimating roof area
A sloped roof has more surface than the ground it covers. This calculator multiplies your building footprint by a pitch factor to estimate the actual roof area, helping you order shingles or sheeting with a little extra for waste.
Frequently Asked Questions
What is the Roofing Calculator?
Estimate roof area from the building footprint and pitch. It runs instantly in your browser and is completely free.
Is the Roofing Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Roofing Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.