Home Energy Savings Calculator

Select the efficiency upgrades you're considering and see their combined, realistically stacked effect on your bill.

This tool provides a planning estimate based on the assumptions shown below the results — it is not a quote, and actual costs and savings will vary by installer, local rates, and your specific home.

Select your upgrades to see your combined savings.

How this calculator works

Each upgrade's savings percentage is applied multiplicatively to what remains of your bill after prior upgrades — not added together — since stacking percentage savings additively overstates the combined effect.

Individual percentages reflect DOE Energy Saver guidance midpoints for under-optimized homes; actual results vary by home age, climate, and current condition.

Source: DOE Energy Saver guidance (Insulation, Thermostats, Ductless/Ducted Systems), last updated 2026-06-01.