# Roofing Material

> Estimate the required amount of roofing 'squares' and shingle bundles based on footprint area and roof pitch.

Page: https://askcalculators.com/calculator/roofing-calculator/
Definition: https://askcalculators.com/calculator/roofing-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/roofing-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/roofing-calculator/?area=2000&pitch=4

## Inputs
- area: Total Footprint (sq ft); type=number; optional; default=2000
- pitch: Roof Pitch (rise per 12ft); type=number; optional; default=4

## Outputs
- result: Result; format=text; primary

## Formula
Roof area = footprint area × pitch factor; required squares = roof area × waste factor ÷ 100 square feet.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.