Home & Construction
Solar Panel Calculator
Calculate solar panel needs and savings
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What does the Solar Panel Calculator do?
It helps you calculate solar panel needs and savings.
What inputs do I need?
Enter Monthly usage, Sun hours per day, and Panel wattage.
Are decimals supported?
Yes, you can use decimal values where appropriate.
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About this tool
This Solar Panel Calculator turns your inputs into practical results. Provide Monthly usage, Panel wattage, and Sun hours per day to calculate System size and Panels needed.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.