Enter your home size, monthly energy bill, heating/cooling temperature settings, and fuel type to see how much a smart thermostat could save you. Get your estimated monthly savings, annual savings, and payback period based on real usage patterns. Also try the EUI (Energy Use Intensity) Calculator.
Estimated Annual Savings
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Estimated Monthly Savings
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Energy Bill Reduction
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Payback Period
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Heating Savings (Annual)
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Cooling Savings (Annual)
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Most homeowners save between 8% and 15% on their heating and cooling bills by switching to a smart or programmable thermostat. For an average energy bill of $180/month, that translates to roughly $170–$320 per year. Savings depend on how much you reduce temperatures when away or sleeping versus your current settings. See also our find Energy Use Intensity (EUI) with Building Energy Audit Calculator.
The calculator compares your current temperature settings (home, away, sleep) against recommended energy-saving setpoints for each period. It applies standard degree-reduction savings rates — roughly 1% savings per degree Fahrenheit adjusted over 8 hours — to the heating and cooling portion of your monthly energy bill.
Yes. Different fuels have different cost structures and efficiency levels. Electric systems and propane tend to have higher per-unit energy costs, which can mean larger dollar savings from temperature setbacks. Natural gas users also see meaningful savings, especially in colder climates.
The U.S. Department of Energy recommends setting your thermostat to 68°F when home and awake, then lowering it by 7–10°F when you're asleep or away. This simple adjustment can save up to 10% per year on heating costs. You might also find our use the Energy Efficiency Upgrade ROI Calculator useful.
For summer, ENERGY STAR recommends 78°F when you're home, 85°F when away, and 82°F while sleeping. Raising your thermostat by just 7–10°F during away periods can save significantly on air conditioning costs.
With typical savings of $150–$300 per year and a thermostat cost of $100–$250, most households recoup their investment in 6 to 18 months. The payback period shown in this calculator is based on your specific bill and estimated savings rate.
Larger homes generally have higher energy bills, so the dollar amount saved tends to be greater — but the percentage savings from setback strategies is roughly consistent regardless of size. The calculator factors in home size to estimate the heating and cooling portion of your bill.
If you consistently follow an efficient schedule with a programmable thermostat, a smart thermostat may offer only marginal additional savings. However, smart thermostats can optimize schedules automatically, learn your patterns, and adjust for weather changes — often squeezing out an extra 5–8% in savings compared to manually programmed devices.