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Home, building & household
Solar panel area calculator
Estimate roof area and panel count for a target system size.
Your result
Complete the fields and calculate.
Example
Solar panel area calculator
10 kWp with 440 W panels needs about 23 panels plus installation space.
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.