Roof Shingle Bundle Calculator
Enter your roof area, waste allowance and bundle coverage to calculate how many shingle bundles you need.
Roof Shingle Bundle Calculator
Calculate the number of shingle bundles needed to cover a roof, including a waste allowance.
This calculator provides a material estimate for general planning purposes only. Always add a safety margin and confirm quantities with your supplier or contractor before purchasing, since real-world waste, layout and offcuts vary by project.
This calculator adds your chosen waste allowance to the roof area, then divides by each bundle's coverage to find the number of bundles to order, rounding up to ensure full coverage.
Example
- With the default values shown above, this calculator returns: Area Including Waste ≈ 2,200.00; Bundles Needed ≈ 67; Roofing Squares Needed ≈ 22.00.
Frequently Asked Questions
What is a 'roofing square'?
A roofing square is 100 square feet of roof area — a standard unit used for pricing and ordering roofing materials.
How much waste allowance should I use?
10% is a common allowance for a simple roof; more complex roofs with many hips, valleys and dormers may need 15% or more.