Roofing Calculator
Roof area and shingle bundles from footprint and pitch.
m
m
°
%
Roof area
121.94m²
Footprint
96m²
Roofing squares
13.13
Shingle bundles (≈3/sq)
40
ShowHide the working
- 1Footprint = 12 × 8 = 96 m²
- 2÷ cos(30°) for the slope, + 10% = 121.94 m²
Formula
roof area = footprint ÷ cos(pitch)How it works
Estimates the sloped roof area from the building footprint and pitch — a steeper roof has more surface than its footprint.
Example
A 12 × 8 m building with a 30° pitch has about 122 m² of roof.
About the Roofing Calculator
Roof area and shingle bundles from footprint and pitch. It sits in the Home & Construction section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Roofing Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Roofing Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Roofing Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Home & Construction?
- Paint, tile, concrete, flooring, lumber and material estimates. You can browse the full Home & Construction category for related calculators.