Calculator
Roof Pitch Calculator
Calculate roof pitch, angle, slope factor, rafter length, area, bundles, sheets, and material estimate.
Last updated: August 21, 2026
How it works
The calculator converts entered dimensions into volume, weight, material quantity, waste allowance, and estimated cost using editable project assumptions.
Material density, waste, compaction, bag yield, labor cost, and supplier pricing should be checked against your local project conditions.
This is a planning estimate and should be checked against drawings, site measurements, supplier data, and local code requirements.
FAQ
How should I use the result?
Treat the result as a planning estimate based on the values you entered.
Why can the answer differ from another tool?
Different tools may use different rounding, default assumptions, provider fees, rates, or data sources.
Can I copy the result?
Yes. Use the copy button after calculation to copy a clean result summary.
Does this require an API?
No. This calculator runs in your browser without an extra API request.