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HVAC

HVAC Electricity Cost Calculator

Calculate the electricity cost of any HVAC equipment from its wattage and run time.

Your numbers

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Result

Total cost $180.00
Energy used 1,050.0 kWh
Cost per day $6.00
Annualised cost $2,190
That equipment uses 1,050.0 kWh over 30 days, costing $180.00, about $6.00 a day.

Nameplate wattage is the maximum draw. Modulating and variable-speed equipment averages well below it, so this is an upper bound for those systems.

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Questions

About this calculator

How do I find my equipment's wattage?

The data plate on the unit lists volts and amps, multiply them for watts. For 240V equipment remember to use the full voltage, not 120.

Why is my bill higher than this?

Because this covers one piece of equipment. Auxiliary heat strips, blower motors running continuously and defrost cycles on heat pumps all add consumption the nameplate does not show.

The formula

kWh = watts ÷ 1,000 × hours × days

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Estimating is the easy part

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