Free HVAC Energy Calculator

HVAC Monthly Energy Cost Calculator

Estimate monthly heating or cooling costs for central air conditioning, heat pumps, electric heating and gas furnaces using system size, efficiency, runtime and your utility rates.

Calculate Monthly HVAC Cost

Monthly HVAC Energy Costs

Estimate heating and cooling expenses.

For a calculation focused only on central air conditioning, use our AC running cost calculator . To compare efficiency upgrades, use the SEER2 savings calculator .

Calculate Monthly HVAC Energy Cost

Select the HVAC operating mode and enter your estimated utility information.

HVAC Operating Mode

HVAC System Capacity

SEER2 Rating Enter the cooling efficiency rating.

Average HVAC Runtime Per Day

Electricity Rate ($ / kWh) Replace the example value with your utility rate.

Natural Gas Rate ($ / Therm) Used only when Gas Furnace Heating is selected.

HVAC Operating Days This Month

Average HVAC Load HVAC equipment usually does not operate at full rated output every minute.

Estimated Monthly HVAC Energy Cost - -

This estimate represents the selected heating or cooling mode only. Actual utility bills vary with weather, equipment cycling, thermostat settings, ducts, insulation, utility fees and household energy use.

- Approx. Operating Demand

Daily Cost -

Operating Mode -

System Size -

Runtime -

HVAC energy costs seem unusually high?

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

Important: this calculator estimates energy cost from simplified system capacity, efficiency and runtime assumptions. It is not a utility-bill prediction or equipment performance test. Gas furnace mode also includes an estimated blower electricity load.