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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.

Start with the Solar Cost Calculator
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Three simple tools. One solar decision journey.

Step 1

Solar Cost Calculator

Estimate the upfront cost of a home solar installation based on your electricity bill, system size, and planning assumptions.

Estimate Solar Cost
Step 2

Solar Savings Calculator

Estimate monthly savings, annual savings, and bill reduction from a home solar system using simple planning inputs.

Estimate Solar Savings
Step 3

Solar Payback Calculator

Estimate break-even timing, net cost after incentives, and long-term return from a residential solar project.

Estimate Solar Payback

How 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.

Go to Solar Cost Calculator