Energy & Home Calculators

Energy bills are one of the biggest household expenses in the US and UK — and they've risen sharply in recent years. These four calculators help homeowners answer the question that actually matters before spending $10,000–$30,000 on upgrades: how long will it take to get that money back?

The solar panel ROI calculator lets you enter your current electricity cost, system size, and local irradiance to get a realistic payback period. Most US residential solar installations break even in 7–12 years — but that range shifts significantly depending on state incentives, net metering policies, and whether you qualify for the 30% federal IRA tax credit. Running the numbers first means you won't be surprised.

Thinking about ditching gas or oil heat? The heat pump calculator compares your current heating costs against what a heat pump would cost to run, factoring in the Coefficient of Performance (COP) of modern units. Pair that with the insulation savings calculator — because the best heat pump in the world won't save you much if warm air is escaping through poorly insulated walls and attic.

For a full picture of where your energy budget goes, the home energy cost calculator breaks down electricity, heating, and hot water costs device by device, giving you a starting point for deciding where upgrades will have the most impact.