Free roofing square calculator
Calculate roofing squares from square feet
One roofing square covers 100 square feet. Enter measured roof surface area and a waste percentage to see both the exact and rounded planning quantities.
Live calculation
Roofing squares result
- Measured squares
- 25.00
- Squares with waste
- 27.50
- Planning order
- 28 squares
Planning estimate only. Verify field measurements, product coverage, bundle packaging, waste, starter, ridge cap, local code, and manufacturer instructions before purchasing.
Need a measured roof, not another calculation?
Order a $19 human-reviewed residential roof measurement report. Typical turnaround is about one working hour for straightforward homes with usable imagery.
Questions
How many square feet are in one roofing square?
One roofing square is 100 square feet of roof surface area.
Should I add waste?
Usually, but the appropriate factor varies by roof complexity, product, layout, and installer practice.
Why does the planning order round up?
Roofing products are purchased in whole packages and shortages can interrupt the job.