Window AC unit Electricity Cost in Montana — $30.86/month (2026)
Montana monthly
$30.86
U.S. average monthly
$43.15
Difference
-$12.28
← Window AC unit (all states) · Montana electricity rate
Quick rate
Daily cost
$1.03
Monthly cost
$30.86
+$0.00 vs typical
Yearly cost
$375.51
kWh / month
240.0 kWh
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ad-after-calculator Quick answer
Running a typical window ac unit in Montana costs about $1.03/day or $30.86/month at roughly $0.129/kWh, assuming 8 hours of use per day at 1000 W. The U.S. average rate is about $0.180/kWh, so Montana is roughly 28% lower than average for this estimate.
vs U.S. average
Local rate (Montana)
$0.129/kWh
Monthly estimate: $30.86
U.S. average rate
$0.180/kWh
Monthly estimate: $43.15
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ad-after-state-table FAQ
- Most window ac unit units fall between 500 W and 1500 W, with 1000 W as a typical value for estimates.
- Our calculator uses 1000 W as the typical wattage, within a reported range of 500–1500 W.
- At 8 hours/day and 1000 W, the estimate is about 8.00 kWh per day.
- Using 8 hours/day, the estimate is about 240.0 kWh per month.
- Per hour, window ac unit uses about 1.000 kWh (at 1000 W).
- At typical use (1000 W and 8 hours/day), the estimate is about $1.03/day at roughly $0.129/kWh.
- At typical use (1000 W and 8 hours/day), the estimate is about $30.86/month at roughly $0.129/kWh.
- Running for one hour at 1000 W costs about $0.129 per hour (using the Montana rate of about $0.129/kWh).
- For typical use, the calculator estimates about $30.86/month for window ac unit in Montana.
- At the typical Montana residential rate, the estimate is about 240.0 kWh per month, which corresponds to roughly $30.86/month for window ac unit.
- Compared to the U.S. average, Montana is about 28% lower for this estimate. Monthly cost is about $30.86 in Montana vs $43.15 at the national average.
- Start with practical steps from our tips list (e.g., Seal air leaks and improve insulation to reduce run-time.). Smaller changes reduce kWh usage, which reduces the bill at your local rate.
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Est. monthly at Montana rate ($0.129/kWh)