How the heat pump estimate works
The calculator converts watts to kilowatts, multiplies by effective runtime, and then applies the electricity price. With the starting inputs, this heat pump uses about 600.0 kWh per month.
Nameplate power is a rough input. Seasonal efficiency ratings and measured kWh provide better whole-season estimates.
How runtime changes the estimate
These scenarios assume the device draws the full starting wattage for the entire runtime. Cycling and variable-speed equipment should use effective runtime or measured kWh.
How to estimate heat-pump electricity cost
A heat pump’s electrical draw is not the same as the heat it delivers. Its coefficient of performance (COP) describes delivered heat divided by electrical input, so the same home-heating load can require very different kWh at different outdoor temperatures.
For a bill estimate, measured circuit kWh or utility interval data is stronger than multiplying one nameplate value by every thermostat hour. Auxiliary resistance heat should be identified separately because it can draw much more power than the compressor.
Electrical-draw scenarios to investigate
These are input-energy examples, not equipment-sizing estimates. Weather, capacity, COP, defrost, duct losses, and auxiliary heat must be evaluated separately. Costs use the latest 2026-05 U.S. residential average of 18.44¢/kWh.
Compare heating systems on the same delivered load
A useful heat-pump comparison begins with the heat the home needs, then applies COP to the heat pump and resistance efficiency to the alternative. Comparing only equipment wattages can produce the wrong conclusion.
Large thermostat recoveries, defrost cycles, very cold weather, equipment faults, or an emergency-heat setting can activate resistance strips. Unexpected auxiliary heat is worth investigating before assuming a normal seasonal increase.
Estimated monthly cost in high-price states
Practical ways to reduce cost
- Avoid large setbacks that trigger auxiliary heat.
- Keep filters and outdoor coils clean.
- Have persistent comfort or icing problems diagnosed.
Compare related equipment
Frequently asked questions
How much electricity does a heat pump use?
Using a 2,500-watt starting input for 8 hours per day and 30 days per month produces an estimate of 600.0 kWh per month. Actual use can differ because equipment may cycle or change power.
How much does it cost to run a heat pump each month?
At the latest 2026-05 U.S. residential average price of 18.44 cents per kWh, the starting estimate is $110.64 per month. Replace the inputs with your own numbers for a personal estimate.
What number should I use for the electricity price?
Divide the total electric charges on your latest bill by the total kWh used for an all-in price. State averages are useful for comparison but are not utility-specific rates.
U.S. Energy Information Administration, Electricity Retail Sales, residential average price. Latest monthly data: 2026-05; comparison baseline: 2025 annual. Verified 2026-08-05. Monthly prices can vary seasonally and are not utility-specific rates.