๐งฎ Free Tools
Renewable Energy Calculators & Tools
Run the numbers before you spend a cent. Every tool below is free, private and instant โ built to help you make smarter clean-energy decisions in 2026.
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Solar Panel Calculator
Size a system for your roof.
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Solar Savings Calculator
Estimate lifetime savings.
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Electricity Bill Calculator
Break down your monthly bill.
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Carbon Footprint Calculator
Measure your annual COโ.
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Energy Consumption Calculator
Track household kWh use.
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Solar Battery Calculator
Size your storage bank.
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Solar ROI Calculator
Payback & return on solar.
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EV Charging Cost Calculator
Cost to charge your EV.
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Wind Power Calculator
Turbine output estimator.
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Home Energy Audit Calculator
Find efficiency wins.
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Appliance Energy Calculator
Cost per appliance.
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LED Savings Calculator
Switch-to-LED savings.
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Roof Solar Estimator
Panels that fit your roof.
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Battery Backup Calculator
Backup runtime planner.
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Energy Unit Converter
kWh, MJ, BTU & more.
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Sustainability Score Calculator
Rate your green habits.
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Green Home Planner
Plan an eco upgrade path.
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Water Heating Cost Calculator
Compare heating methods.
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COโ Emission Calculator
Emissions by activity.
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Renewable Energy Comparison Tool
Compare sources side by side.
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