Heat pump water heater Electricity Cost in Washington — $5.59/month (2026)
Washington monthly
$5.59
U.S. average monthly
$7.28
Difference
-$1.69
← Heat pump water heater (all states) · Washington electricity rate
Quick rate
Daily cost
$0.19
Monthly cost
$5.59
+$0.00 vs typical
Yearly cost
$68.05
kWh / month
40.5 kWh
Local monthly estimate: $5.59 · U.S. average equivalent: $7.28
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ad-after-calculator Quick answer
Running a typical heat pump water heater in Washington costs about $0.19/day or $5.59/month at roughly $0.138/kWh, assuming 3 hours of use per day at 450 W. The U.S. average rate is about $0.180/kWh, so Washington is roughly 23% lower than average for this estimate.
vs U.S. average
Local rate (Washington)
$0.138/kWh
Monthly estimate: $5.59
U.S. average rate
$0.180/kWh
Monthly estimate: $7.28
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ad-after-state-table FAQ
- Most heat pump water heater units fall between 300 W and 800 W, with 450 W as a typical value for estimates.
- Our calculator uses 450 W as the typical wattage, within a reported range of 300–800 W.
- At 3 hours/day and 450 W, the estimate is about 1.35 kWh per day.
- Using 3 hours/day, the estimate is about 40.5 kWh per month.
- Per hour, heat pump water heater uses about 0.450 kWh (at 450 W).
- At typical use (450 W and 3 hours/day), the estimate is about $0.19/day at roughly $0.138/kWh.
- At typical use (450 W and 3 hours/day), the estimate is about $5.59/month at roughly $0.138/kWh.
- Running for one hour at 450 W costs about $0.062 per hour (using the Washington rate of about $0.138/kWh).
- For typical use, the calculator estimates about $5.59/month for heat pump water heater in Washington.
- At the typical Washington residential rate, the estimate is about 40.5 kWh per month, which corresponds to roughly $5.59/month for heat pump water heater.
- Compared to the U.S. average, Washington is about 23% lower for this estimate. Monthly cost is about $5.59 in Washington vs $7.28 at the national average.
- Start with practical steps from our tips list (e.g., Avoid running this appliance longer than you need each day.). Smaller changes reduce kWh usage, which reduces the bill at your local rate.
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Est. monthly at Washington rate ($0.138/kWh)