Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Construction
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.
Fill in the required fields to see your result.
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.
Fill in the required fields to see your result.
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. |