Roofing Shingle Calculator
Calculate roofing shingles needed in squares
About this calculator
The Roofing Shingle Calculator helps homeowners and contractors accurately determine the number of roofing shingle squares needed for any roofing project. By calculating the precise amount of materials required, this tool prevents costly overordering or project delays from underestimating shingle needs. It takes into account roof dimensions and waste factors to provide reliable estimates, helping you budget effectively and ensure you have sufficient materials to complete your roofing installation or repair project successfully.
How to use
Enter your roof's length and width measurements in feet to calculate the total square footage. The calculator will automatically convert this to roofing squares (100 square feet each) and add recommended waste allowance for cuts and repairs. Review the results to determine how many shingle squares to purchase for your project.
Frequently asked questions
What is a roofing square?
A roofing square is a standard measurement equal to 100 square feet of roof area, commonly used by contractors and suppliers for material estimation.
How much waste should I add for shingles?
Typically add 10-15% waste for straight roofs and 15-20% for complex roofs with multiple angles, dormers, or intricate designs to account for cuts.
Do I need to measure roof slope?
For basic estimates, roof slope is included in length/width measurements. However, steep slopes may require additional material considerations for safety and installation.