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Cost to run a space heater in Montana
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$0.23/hour
Space Heater at 1,500 W in Montana (15.57¢/kWh) · $42.60/month at 6 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.23 | $7.10 | $85.25 |
| 2 h/day | $0.47 | $14.20 | $170.49 |
| 4 h/day | $0.93 | $28.40 | $340.98 |
| 6 h/day | $1.40 | $42.60 | $511.47 |
| 8 h/day | $1.87 | $56.80 | $681.97 |
| 12 h/day | $2.80 | $85.20 | $1,022.95 |
| 24 h/day | $5.61 | $170.40 | $2,045.90 |
Most portable space heaters are capped at 1,500 W on high; low settings are often 750-900 W. With a thermostat they cycle, so real use is usually lower.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| Montana | 15.57 | $42.60 |
| Arizona | 15.05 | $41.18 |
| South Dakota | 15.15 | $41.45 |
| Kansas | 15.47 | $42.33 |
| South Carolina | 15.76 | $43.12 |
| Georgia | 15.90 | $43.50 |
| Texas | 15.91 | $43.53 |
FAQ
How much does it cost to run a space heater in Montana?
At 1,500 W and 15.57¢/kWh: $0.23 per hour, $1.40 per day and $42.60 per month at 6 h/day.
How does Montana compare with other states?
The same use costs $34.80/month in Nevada (cheapest) and $129.08/month in Hawaii (most expensive); the US average is $49.69.
Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).
Space Heater cost calculator · Electricity cost in Montana
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