Calculate your cost
Start with the example below, then replace the wattage, daily runtime, and rate with the numbers for your heat pump.
This setup uses about 720 kWh in a 30-day month.
Please enter valid values within the ranges shown.
| Schedule | Hours/day | Cost/month |
|---|---|---|
| Half runtime | 4 | $67.79 |
| Page example | 8 | $135.58 |
| Longer runtime | 12 | $203.36 |
Same 3,000-watt input and 18.83¢/kWh rate; only runtime changes.
Formula for the page example
3 kW × 8 hr × $0.1883 = $4.52 per day
Convert watts to kilowatts, multiply by the active hours used each day, then multiply by the electricity price in dollars per kWh. Multiply the daily result by 30 for the monthly estimate shown above.
How to read this estimate
A heat pump moves heat rather than producing it with a resistance element. Its power use still changes with equipment size and weather, and auxiliary resistance heat can raise consumption quickly in very cold conditions.
Use this as a baseline until you can check the label or measure the heat pump directly. Model, settings, condition, climate, and household routine can all change the result.
What changes the cost?
- 01
Equipment size, seasonal efficiency, and compressor speed
- 02
Outdoor temperature and use of auxiliary resistance heat
- 03
Thermostat schedule, insulation, and air sealing
Ways to spend less
- Avoid large thermostat jumps that may trigger auxiliary heat.
- Keep filters and outdoor coils clean.
- Use a weather-appropriate schedule and address obvious air leaks.