Calculate your cost
Start with a representative input, then edit all three numbers.
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 |
| Starting point | 8 | $135.58 |
| Longer runtime | 12 | $203.36 |
Same 3,000-watt input and 18.83¢/kWh rate; only runtime changes.
The quick formula
3 kW × 8 hours × $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 creating it directly, but its electrical demand varies widely with capacity and weather. Very cold conditions can also bring on auxiliary resistance heat, which changes the cost sharply.
The starting values keep this page useful before you have a label or meter reading. They do not describe every model, climate, operating mode, or household.
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.