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Free smart home energy savings calculator: combine electricity baselines with percent savings from scheduling and smart loads, optional heating fuel savings from a connected thermostat, and equipment cost for simple payback. Pair with efficiency and utility tools for a fuller picture.
Last updated: April 18, 2026
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Portion addressable by automation (whole bill is OK for a rough screen).
Gas or other fuel used for heating; 0 if all-electric or N/A.
Thermostat, hub, sensors, smart plugs—enter net cost after rebates for payback.
Electricity savings / yr
$180
Heating fuel savings / yr
$108
Total annual savings
$288
$24.00 / month
Simple payback
2.8 years
5-year cumulative
$1,440
10-year cumulative
$2,880
Planning note
Heating fuel line
Gas or other fuel $/yr
Percent applies to your heating spend baseline, not the whole utility bill.
Electric line
Fold into electric %
Combine with a phantom load estimate for better baselines.
Electric %
Dimming and off commands
LED upgrades plus automation can compound savings.
Comfort vs energy
Split across lines
Electric heat pump loads belong in the electricity baseline.
Cash flow
Add cloud fees offline
Payback ignores ongoing service fees unless you net them from savings manually.
Stack measures
Envelope plus controls
Smart controls work best when infiltration and insulation are addressed.
Combined electric and heating fuel savings with $800 hardware cost:
Total / year
$288
Simple payback
2.8 yrs
10-year cumulative
$2,880
Savings are the sum of two products: your annual electricity cost times an expected percent reduction, plus your annual heating fuel cost times a percent reduction appropriate for thermostat-driven savings. Total annual savings drive monthly equivalents, cumulative 5- and 10-year totals, and simple payback when you supply one-time equipment cost.
electric_savings = elec_cost × (pct_elec / 100)fuel_savings = heat_cost × (pct_heat / 100)total = electric_savings + fuel_savingsPercents are independent levers; do not double-count the same therm or kWh in both baselines.
Thermostat schedules reduce delivered heat when you are away
Stack with weatherization savings for envelope-first upgrades.
Get a custom calculator for your platformSimple payback is about 2.8 years with defaults shown.
Share it with homeowners and integrators sizing automation ROI
Suggested hashtags: #SmartHome #EnergySavings #Thermostat #HomeAutomation #Calculator