Calculate your solar savings. Before anyone calls you.
15 free, neutral calculators that estimate solar costs, payback, tax credits, and home energy savings — using data from the EIA, NREL, and the IRS.
- No signup
- No email capture
- Instant results
- Independent data
Pick your path — solar investment or energy efficiency
Two sets of calculators built around the actual decisions homeowners face: going solar, and reducing the electric bill you already have.
Top calculators homeowners actually use
The six tools that answer the questions we see most often: How much will I save? What will it cost? And when does it pay back?
Solar Panel Savings Calculator
Estimate how much you could save with solar panels based on your monthly electricity bill and location.
Open calculatorSolar Installation Cost Estimator
Estimate the gross cost, federal tax credit, and net cost of installing solar panels at your home.
Open calculatorSolar Payback Period Calculator
Calculate how many years it will take for your solar system to pay for itself.
Open calculatorSolar Tax Credit Calculator
Calculate the federal Investment Tax Credit (ITC) value for your solar system, including any battery storage.
Open calculatorElectricity Cost Calculator
Calculate your monthly and annual electricity costs based on your usage and state's average rate.
Open calculatorHome Energy Audit Calculator
Estimate your annual home energy costs by category and identify the biggest savings opportunities.
Open calculatorFrom one number on a bill to a full solar decision
No account, no email. Enter a few inputs, watch the numbers update instantly, and take the estimates to installers for real quotes.
Enter your bill and state
Defaults are pre-filled for a typical U.S. home so you see results immediately.
Explore live scenarios
Every input recomputes savings, payback, ROI, and chart projections in real time.
Take it to installers
Compare our neutral estimate against two or three certified installer quotes.
Authoritative data, transparent math, zero sales agenda
We do not sell solar, do not capture leads, and do not partner with specific installers. The goal is a neutral first answer you can test against real quotes.
Free, no signup
All calculators run locally in your browser. No email captures, no follow-up sales.
Neutral, not a funnel
We are not a solar installer. Calculators give you a starting point, not a quote.
Authoritative sources
Rates from EIA · sun hours from NREL · tax credit rates from the IRS and DOE.
Clear answers to a $15,000–$40,000 question
What Solar Energy Calcs is, how we source our numbers, and why we built it this way.
Solar & Home Energy Calculators is an independent calculator-first resource for homeowners researching solar panels and home energy efficiency. Every calculator runs entirely in your browser with no signup, no sales pitch, and no personal information required.
We pull our reference data from the U.S. Energy Information Administration (EIA), the National Renewable Energy Laboratory (NREL), and the Department of Energy. Federal tax credit values are based on the current Internal Revenue Code under the Inflation Reduction Act.
All our calculators give you instant estimates as you adjust the inputs — no submit buttons, no waiting. Use them to compare scenarios, stress-test assumptions, and decide whether the next step (getting installer quotes) is worth your time.
Frequently asked questions about our calculators
Common questions about data sources, accuracy, and what to do with the estimates.
Ready to see your solar number?
The Solar Savings Calculator takes under a minute and updates instantly as you change inputs.
Estimate my savings