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Cost to run an electric water heater in Idaho
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$0.53/hour
Electric Water Heater at 4,000 W in Idaho (13.37¢/kWh) · $48.77/month at 3 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.53 | $16.26 | $195.20 |
| 2 h/day | $1.07 | $32.52 | $390.40 |
| 3 h/day | $1.60 | $48.77 | $585.61 |
| 4 h/day | $2.14 | $65.03 | $780.81 |
| 8 h/day | $4.28 | $130.06 | $1,561.62 |
| 12 h/day | $6.42 | $195.10 | $2,342.42 |
| 24 h/day | $12.84 | $390.19 | $4,684.85 |
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
FAQ
How much does it cost to run an electric water heater in Idaho?
At 4,000 W and 13.37¢/kWh: $0.53 per hour, $1.60 per day and $48.77 per month at 3 h/day.
How does Idaho 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 Idaho
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