Roofing & Exterior

Roofing Calculator

Roofing Calculator. Roofing and fence material quantities. Calculations run in your browser. Project dimensions and prices are not uploaded to our server.

Project inputs

Unit system

Currency

Length

Width

Roof rise

Roof run

Waste allowance

Bundle coverage

Price per bundle

Footing mode

Column shape

End-stud policy

Calculations run in your browser. Project dimensions and prices are not uploaded to our server.

Formula & method

Roof area = plan area × √(1 + (rise/run)²)

Worked example

Plan area × √(1 + (rise/run)²) = sloped roof area

Assumptions & limitations

Material estimate only. Verify final quantities, product specifications, plans and local requirements before purchase or construction.