Calculators and checklists

Every tool here runs in your browser. Nothing you type is sent anywhere, stored, or logged — reload the page and it is gone.

They are estimators, not quotes. Each one shows the arithmetic it used so you can check it against your own paperwork rather than trusting a number.

• Solar Payback Calculator

  How long a solar quote takes to pay for itself once incentives, the share of your bill it offsets, and rising utility rates are counted.

• Heat Pump vs Gas Furnace Cost Calculator

  Compare annual heating cost between a gas furnace and a heat pump at your own fuel prices.