Solar cost, savings, and payback calculators for homeowners.
Estimate how much solar could cost, how much it could save, and how long it could take to pay for itself with simple tools designed for quick solar planning.
Three simple tools. One solar decision journey.
Solar Cost Calculator
Estimate the upfront cost of a home solar installation based on your electricity bill, system size, and planning assumptions.
Estimate Solar CostSolar Savings Calculator
Estimate monthly savings, annual savings, and bill reduction from a home solar system using simple planning inputs.
Estimate Solar SavingsSolar Payback Calculator
Estimate break-even timing, net cost after incentives, and long-term return from a residential solar project.
Estimate Solar PaybackHow TheSolarMath works
TheSolarMath helps you move through the main financial questions homeowners usually ask before going solar:
- What could solar cost?
- How much could it save?
- When could it pay back?
Each calculator is designed as a simple planning tool using clear assumptions, editable inputs, and practical outputs.
Built for fast solar planning
These calculators are built for U.S. residential solar planning. They use simple, editable assumptions to help homeowners compare cost, savings, and payback before requesting installer quotes.
- Fast planning estimates
- Editable assumptions
- Cost, savings, and payback in one flow
- Designed for homeowners
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Start with your estimated solar cost
If you are not sure where to begin, start with the Solar Cost Calculator. From there, you can continue into savings and payback.