One roofing square equals 100 square feet. After finding base squares, add waste for cuts, valleys, hips and other roof geometry.
Convert area to roofing squares
Enter roof area in the Roofing Square Calculator. The tool divides area by 100 and adds your selected waste allowance.
Bundles vary by product
Many shingles package around three bundles per square, but not every product does. Verify coverage printed by the manufacturer or supplier.
Pitch can increase surface area
If you are starting from horizontal footprint measurements, use the Roof Pitch Calculator to understand the slope multiplier for simple roof planes.
Do not forget accessories
Underlayment, starter, ridge, flashing, ventilation and fasteners are separate quantities from field shingles.
Run your own numbers: Calculate squares and bundles with the Roofing Square Calculator.