Solar Roof Space Calculator
Free roof tool
Solar Roof Space Calculator
Enter your roof dimensions and see how many solar panels fit, total system kW, and estimated annual production.
Roof dimensions
Longest side of the usable roof area.
Panel & location
Usable roof area0
Panels that fit0
System size0 kW
Annual production0 kWh
🏠 Roof layout breakdown
Estimates based on rectangular roof area. Actual panel count depends on rafter layout, shading, local setback codes, and panel orientation. Get an on-site survey for final design.