Cost to run an electric water heater in Maryland

$0.86/hour

Electric Water Heater at 4,000 W in Maryland (21.40¢/kWh) · $78.07/month at 3 h/day

By hours of use

Use	Per day	Per month	Per year
1 h/day	$0.86	$26.02	$312.44
2 h/day	$1.71	$52.04	$624.88
3 h/day	$2.57	$78.07	$937.32
4 h/day	$3.42	$104.09	$1,249.76
8 h/day	$6.85	$208.18	$2,499.52
12 h/day	$10.27	$312.27	$3,749.28
24 h/day	$20.54	$624.54	$7,498.56

Tank water heaters use 3,000-5,500 W elements; a family typically runs them 2-4 hours a day. Heat-pump models use about a third.

How much does it cost to run an electric water heater in Maryland?

At 4,000 W and 21.40¢/kWh: $0.86 per hour, $2.57 per day and $78.07 per month at 3 h/day.

How does Maryland compare with other states?

The same use costs $46.40/month in Nevada (cheapest) and $172.11/month in Hawaii (most expensive); the US average is $66.25.

Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).

Free calculator by KWhCalc