Roofing Calculator
Accurately estimate the materials needed for your roofing project. Account for roof pitch and surface area to get precise results.
Input Dimensions
Calculation Results
How to Use the Roofing Calculator
Calculating roofing materials requires precision to ensure a watertight and durable finish. Start by entering the total area of your roof in square meters. If your roof has a pitch (slope), enter the pitch value (e.g., 4:12) to account for the additional surface area created by the angle.
Select the type of roofing material you plan to use—shingles, tiles, or metal sheets. Finally, enter the cost per unit of material. Click "Calculate Now" to see the total material needed and the estimated cost for your roofing project.
Pro Tips for a Durable Roof
Safety First
Roofing is dangerous. Always use a proper safety harness and never work alone or in wet/windy conditions. Your safety is worth more than the cost of a contractor.
Underlayment is Essential
Don't skimp on the underlayment. A high-quality waterproof membrane provides a secondary layer of protection against leaks if a shingle or tile is damaged.
Frequently Asked Questions
How do I calculate roof area from the ground?
You can estimate roof area by measuring the footprint of the house and then multiplying by a pitch factor (e.g., 1.05 for a low pitch, 1.25 for a steep pitch) to account for the slope.
What is a "square" in roofing?
In the roofing industry, a "square" is a unit of area equal to 100 square feet (approx. 9.3 square meters). Most shingles are sold by the square.
How long does a typical roof last?
Asphalt shingles usually last 20-30 years, while metal and tile roofs can last 50 years or more with proper maintenance and periodic inspections.