Roofing calculators for US projects
One roof project. Every material number.
Combine roof sections with different pitches, calculate materials from real package coverage, and create a report you can verify before buying.
- No sign-up
- Multiple roof sections
- Printable, transparent report
The complete workspace
Roofing Project Calculator
Add a main roof, garage, addition or matching dormers with separate pitches. The workspace combines their area, rounds each material package independently and produces a saved, shareable report.
Open the project workspaceOne connected project
- Geometry
- By section
- Materials
- Whole packs
- Saving
- On device
- Report
- PDF / CSV
Roofing workflow
Know where each calculation fits
Ten roofing tools save project values in your browser. Start with measurements, choose your roof material, then check framing geometry and build a budget.
- 1Open
Measure pitch
Find the roof slope, angle and pitch multiplier.
- 2Open
Calculate area
Convert the building footprint into roof surface area.
- 3Open
Convert to roofing squares
Add a visible waste allowance to measured roof area.
- 4Open
Build the roof project
Combine roof sections, estimate packages and export one report.
- 5Open
Confirm shingle bundles
Use the exact installed coverage of the selected shingle product.
- 6Open
Plan metal panels instead
For metal roofs, build a panel schedule by plane, coverage and length.
Framing and project budgets
Check reference geometry or organize your quoted costs.
Rafter Length Calculator
Common rafter reference length with ridge thickness and overhang
Open calculatorRoof Truss Calculator
Preliminary gable geometry and truss position count
Open calculatorRoofing Cost Calculator
Itemize materials, labor, allowances and contingency using your rates
Open calculatorRoof Replacement Calculator
Plan removal layers, disposal, deck repairs and replacement cost
Open calculatorBefore you calculate
Prepare reliable measurements
Read the guides and download free worksheetsCalculator results are only as useful as the measurements entered. A few checks before you start can prevent large errors later in the project.
- Use one unit system consistently and double-check every measurement.
- Measure the horizontal run—not the sloped roof surface—when finding pitch.
- Record each roof plane separately for roofs with multiple sections.
- Note valleys, hips, dormers, overhangs and penetrations before estimating waste.
More useful tools
Home project calculators
Roofing calculator questions
Straight answers about measurements, estimates and how to use the tools.
Content reviewed September 21, 2026.