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Home, building & household
Roof area calculator
Calculate roof area from length, slope length and roof sides.
Your result
Complete the fields and calculate.
Example
Roof area calculator
12 m × 6.5 m × 2 roof sides gives 156 m².
FAQ
Frequently asked questions
How accurate is the result?+
The calculator uses the stated formula and only rounds the display. Accuracy depends on your inputs.
Is this calculator really free?+
Yes. Use it as often as you like without an account or registration.
Are my entries stored?+
The calculation runs directly in your browser. Calculator values are stored locally only when you explicitly add a result to “My results”. Favourites and history also remain locally on your device.