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Cost to run an electric water heater in New Hampshire
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$1.11/hour
Electric Water Heater at 4,000 W in New Hampshire (27.64¢/kWh) · $100.83/month at 3 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $1.11 | $33.61 | $403.54 |
| 2 h/day | $2.21 | $67.22 | $807.09 |
| 3 h/day | $3.32 | $100.83 | $1,210.63 |
| 4 h/day | $4.42 | $134.44 | $1,614.18 |
| 8 h/day | $8.84 | $268.88 | $3,228.35 |
| 12 h/day | $13.27 | $403.32 | $4,842.53 |
| 24 h/day | $26.53 | $806.65 | $9,685.06 |
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.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| New Hampshire | 27.64 | $100.83 |
| Connecticut | 24.51 | $89.41 |
| New Jersey | 24.61 | $89.78 |
| District of Columbia | 25.98 | $94.78 |
| Rhode Island | 28.18 | $102.80 |
| New York | 28.65 | $104.52 |
| Alaska | 29.41 | $107.29 |
FAQ
How much does it cost to run an electric water heater in New Hampshire?
At 4,000 W and 27.64¢/kWh: $1.11 per hour, $3.32 per day and $100.83 per month at 3 h/day.
How does New Hampshire 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).
Electric Water Heater cost calculator · Electricity cost in New Hampshire
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