ClarityHow to use this tool
- Enter area to cover, roof pitch angle.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Area to cover | Numeric value. Unit: m². Must be greater than zero. | 20 |
| Roof pitch angle | Numeric value. Unit: degrees. Zero or positive. Maximum: 89. | 30 |
Result for these sample inputs
23.0940108 m²
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Sloped area = horizontal plan area/cos(pitch angle).
Using area to cover = 20 m², roof pitch angle = 30 degrees, the result is 23.0940108 m². Change these example inputs to match your task; use the method above to check each step.
What to keep in mind
Uniform pitch; enter footprint including desired overhangs. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.
Methodology maintained by ClarityKit. How these tools are built and checked.