Solar
Solar Panel Area Calculator
Calculate the number of solar panels and approximate roof area required for a target solar system size.
Solar System
kW
W
Panel Dimensions
m
m
%
Adds space for panel gaps, access and practical layout. Adjust as needed for your roof.
Panels Required
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Number of panels required to meet or exceed the target solar capacity.
Installed Solar Capacity
—
Area of One Panel
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Total Panel Area
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Approx. Roof Area Required
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How it is calculated:
Number of panels = required system capacity ÷ panel wattage, rounded up to the next whole panel.
Area of one panel = panel length × panel width.
Total panel area = panel area × number of panels.
Approximate roof area = total panel area × (1 + extra area allowance).
Actual roof-area requirements can vary because of roof shape, setbacks, access paths, obstructions, tilt, spacing, mounting system and local installation requirements.