Pitched Roof Area
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Pitched Roof Area
Estimate area for a uniform roof pitch from its horizontal projection.
UNDERSTAND YOUR RESULT
How it works
Estimate area for a uniform roof pitch from its horizontal projection.
THE CALCULATIONsloped area = horizontal area × sqrt(1 + (rise/run)²)
Using this calculator
Enter horizontal roof projection (m²), pitch rise, pitch horizontal run. sloped area = horizontal area × sqrt(1 + (rise/run)²).
What to keep in mind
A quantity estimate using your measurements, not a structural design, building-code check or purchasing specification. Allow for real shapes, cutting and the product instructions.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.