Roof measurement
Roof squares calculator
Convert roof area to roofing squares. Homeowner is comparing material quantities or quotes.
Try the calculation
Convert surface area to US roofing squares.
Adjustable example. Change these illustrative inputs to match your task, then recalculate. Reset restores the example and its result.
Understand the result
How this calculation works
A roofing square is 100 square feet of roof area.
Steps
- Enter measured roof area in square feet and submit.
- Keep the result separate from any purchase rounding.
The form starts with the worked example below. Change its values and selections to match your task; Reset restores the example.
Formula
squares = roof area ÷ 100; purchase count = ceiling(squares) when whole squares are required.
Variables and units
- Roof area (sq ft)
- Required. Use a positive value. Starting example: 1341.6. Replace it for your task.
What the result means
The decimal is the area conversion. A supplier or product may use a different packaging increment.
Worked example
Inputs: Roof area = 1341.6.
Calculation: 1,341.6 sq ft ÷ 100 = 13.416 squares; a whole-square purchase allowance rounds to 14.
Result: 13.42 squares.
Frequently asked questions
Is a square the same as a bundle?
No. A square is an area unit; bundles are product packaging.
Does the page add waste?
No. Add a documented allowance in the material quantity calculation.
Can I use a measured sloped area?
Yes, if it represents the surface area covered by the material.