Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Roof Shingle Estimator (with Pitch)

Estimate the shingle bundles needed for a roof using the building footprint and the roof pitch. Enter the footprint length and width, choose the pitch to set the slope multiplier, add a waste allowance, and pick the shingle type to get the bundle count.

Footprint Length (ft)

Footprint Width (ft)

Roof Pitch

Waste Allowance (%)

Shingle Type

Construction

Roof Area Calculator

Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers.

Roof Length (m)

Roof Width (m)

Roof Pitch (degrees)

Key differences

	Roof Shingle Estimator (with Pitch)	Roof Area Calculator
Category	Construction	Construction
Inputs required	5	3
Result	Shingle Bundles Needed (bundles)	Roof Surface Area (m²)
What it does	Estimate the shingle bundles needed for a roof using the building footprint and the roof pitch. Enter the footprint length and width, choose the pitch to set the slope multiplier, add a waste allowance, and pick the shingle type to get the bundle count.	Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers.