Home Energy & Bills Calculators

Understanding where your energy goes is the foundation for every other energy decision — whether that's going solar, adding a battery, switching to a heat pump, or simply reducing your monthly bill. Most households significantly overestimate some costs and underestimate others, which leads to misplaced priorities.

Start with the home energy calculator to map your total consumption by appliance category. Then run individual appliances through the appliance cost calculator to identify the biggest contributors — space heating, water heating, and clothes dryers are often the top three, but the ranking varies by household and climate.

The bill breakdown tool separates your electricity bill into energy charges versus fixed fees, demand charges, and taxes — this matters because solar and efficiency upgrades only reduce the energy portion. If your utility offers time-varying rates, the time-of-use savings calculator shows how much you could save by shifting high-draw activities to off-peak hours. For homes with high heating or cooling costs, the insulation savings calculator estimates annual savings from upgrading to higher R-values in your attic, walls, or crawlspace.