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Free HVAC Thermostat Calculator

Thermostat Savings Calculator

Estimate how much a scheduled thermostat setback could reduce annual heating and cooling costs based on your HVAC spending, temperature adjustment, schedule length and number of setback days.

Estimate Thermostat Savings
Heating & Cooling Schedule Savings

Estimate the value of a better thermostat schedule.

If you do not know your approximate HVAC energy spend, estimate it first with our HVAC monthly energy cost calculator . If you are considering buying a connected thermostat, use the smart thermostat ROI calculator next.

Calculate Potential Thermostat Energy Savings

Enter your HVAC cost and the temperature schedule you plan to use.

Enter the approximate HVAC portion of your monthly energy cost.
Lower in heating mode or higher in cooling mode while away or asleep.
Real savings depend heavily on whether the schedule is actually followed.
Estimated Annual HVAC Savings - -

This is a simplified planning estimate. Actual thermostat savings vary with weather, building insulation, HVAC efficiency, occupancy, comfort preferences and how consistently the setback schedule is followed.

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Estimated HVAC Cost Reduction
Baseline HVAC Cost -
New Estimated Cost -
Monthly Equivalent Savings -
Setback Schedule -
Heat pump note: large temperature setbacks can sometimes trigger auxiliary electric resistance heat during recovery. Use a thermostat and setback strategy designed for your heat pump system rather than assuming a large setback will always produce greater savings.

Considering a thermostat upgrade?

Request HVAC help below if you want to provide your location and information about the HVAC system.

How this estimate works: the calculator uses the U.S. Department of Energy's commonly cited thermostat setback benchmark as a reference point, then scales the estimate according to the setback temperature, hours, days and schedule consistency you enter. It does not guarantee energy or utility-bill savings.