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Roofing resources

Roofing Square Calculator: Footprint to Roof Area

Convert roof area into squares with a clear choice between sloped surface and horizontal projection.

TRY THE CALCULATOR

Start with your inputs.

Example values are editable. These inputs do not measure a property.

THE RESULT, EXPLAINED

Clear inputs. Clear results.

Choose your units and calculate to see the result and its assumptions. Changing an input clears the previous result.

How much is one roofing square?

One square is 100 square feet of roof surface. A measured surface of 2,000 square feet equals 20 squares before waste.

Roof surface unit conversions, before waste
Sloped surface areaRoofing squares
100 sq ft1
1,000 sq ft10
2,000 sq ft20
100 m²10.7639

Does my area need a pitch adjustment?

Only projected horizontal area needs a pitch multiplier. A simple building footprint may omit overhangs. For mixed pitches, calculate the projected area of each facet separately and add the sloped results.

Check your pitch

Calculate the slope multiplier.

Compare allowances

Add waste as a separate scenario.

Understand the area basis

Read a report with its units.

YOUR ROOF. YOUR NEXT STEP.

Start with a clearer picture.

Check your property