How Much Does a Heat pump water heater Cost to Run? (2026 Calculator)
Typical setup: 450 W · 3 h/day · $0.180/kWh
Daily
$0.24
Monthly
$7.28
Yearly
$88.59
Quick rate
Daily cost
$0.24
Monthly cost
$7.28
+$0.00 vs typical
Yearly cost
$88.59
kWh / month
40.5 kWh
Ad slot
ad-after-calculator Quick answer
A typical heat pump water heater uses about 450 W and costs about $0.23/day or $6.80/month at the U.S. average rate of $0.17/kWh, assuming 3 hours of use per day. At the same rate, costs range from about $0.15/day (300 W) to $0.40/day (800 W).
State explorer
Quickly spot cheapest, highest, and near-average monthly costs.
Top 10 cheapest
Top 10 highest
- Hawaii $16.11
- Massachusetts $12.62
- Maine $12.45
- California $12.27
- Rhode Island $12.21
- New York $11.49
- Connecticut $11.46
- New Hampshire $10.66
- Alaska $10.34
- District of Columbia $9.61
Cost by state (monthly)
At typical 450 W and 3 h/day. Rates from our dataset (see methodology ). Open a state for a dedicated calculator page.
Ad slot
ad-after-state-table Wattage range
| Level | Watts | Est. monthly @ avg rate |
|---|---|---|
| Low | 300 W | $4.85 |
| Typical | 450 W | $7.28 |
| High | 800 W | $12.94 |
Energy saving tips
- Avoid running this appliance longer than you need each day.
- Use built-in eco or energy-saving modes whenever available.
- Shift usage to off-peak hours if your utility offers time-of-use rates.
- Set the thermostat a few degrees higher in summer or lower in winter.
- Use ceiling fans to feel cooler at a higher thermostat setting.
FAQ
- Most heat pump water heater units fall between 300 W and 800 W, with 450 W as a typical operating value for estimates.
- Our estimates use 450 W as the typical wattage, within a reported range of 300–800 W.
- At typical use (3 hours/day at 450 W), the estimate is about 1.35 kWh/day and 40.5 kWh/month at the U.S. average rate.
- With 3 hours/day and 450 W, this appliance uses about 1.35 kWh per day.
- At 3 hours/day, the monthly estimate is about 40.5 kWh per month.
- Per hour, the typical draw is about 0.450 kWh (at 450 W).
- At the U.S. average electricity rate of $0.17/kWh, the typical daily cost is about $0.23/day for 3 hours/day.
- At the U.S. average electricity rate of $0.17/kWh, the typical monthly cost is about $6.80/month at 3 hours/day.
- Running for one hour at 450 W costs about $0.08/hour (using 0.17 $/kWh as the U.S. average).
- With typical use (3 hours/day at 450 W), the estimate is about $0.23/day or $6.80/month at the U.S. average rate.
- The estimate is about 40.5 kWh per month, which corresponds to roughly $6.80/month at the U.S. average rate. Your real bill depends on your rate and runtime.
- Use energy-saving tips tailored to this appliance. For example: Avoid running this appliance longer than you need each day. — reducing kWh reduces the bill at your local rate.