Portable AC Electricity Calculator in Montana
A portable ac in Montana costs about $27.52 a month ($334.85 a year) to run at the state's average rate of 13.90 ¢/kWh. Use this calculator to compare light, typical, and heavy use.
Montana average rate
13.90 ¢/kWh
Assumed wattage
1,100 W
Typical usage pattern
6 hours/day
Typical monthly cost
$27.52
Typical yearly cost
$334.85
Key metrics
| Metric | Value |
|---|---|
| Montana average rate | 13.90 ¢/kWh |
| Assumed wattage | 1,100 W |
| Typical usage pattern | 6 hours/day |
| Typical monthly cost | $27.52 |
| Typical yearly cost | $334.85 |
Portable AC in Montana vs U.S. benchmark
Montana monthly estimate
$27.52
U.S. monthly estimate
$38.25
Difference
-$10.73
State rate
13.90 ¢/kWh
Calculator assumptions
This calculator uses a typical wattage range of 700-1,400 W, and we assume 1,100 watts for 6 hours/day. The formula is kWh = (watts × hours) / 1000.
At this profile, the appliance uses 198.0 kWh per month and 2409.0 kWh per year.
Appliance calculator scenarios
| Scenario | Hours/day | Annual energy | Montana monthly | U.S. monthly | Montana yearly |
|---|---|---|---|---|---|
| Light usage | 3 hours/day | 1204.5 kWh | $13.76 | $19.13 | $167.43 |
| Typical usage | 6 hours/day | 2409.0 kWh | $27.52 | $38.25 | $334.85 |
| Heavy usage | 9 hours/day | 3613.5 kWh | $41.28 | $57.38 | $502.28 |
Appliance cost reference page
Want the full write-up? The appliance page below uses the same rate and wattage assumptions:
More comparison links
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State cost and bill pathways for Montana
- Average power price in Montana — What a kWh of electricity costs in Montana
- Montana electricity rates — Core authority page with statewide pricing context
- Electricity cost in Montana — State-level cost, affordability, and value overview
- Montana monthly electricity bill estimate — What a typical monthly bill looks like
- Electric bill estimator scenarios in Montana — Estimate your bill from your monthly usage
- Montana data profile — Machine-readable state profile and metrics
Historical and trend pages
- Historical electricity prices in Montana — Historical context and trend interpretation
- Electricity inflation in Montana — State electricity inflation analysis
- Montana electricity price volatility — Volatility and rate movement profile
Fixed-usage and calculator pathways
- Electricity cost for 100 kWh in Montana — Cost for this usage amount in the same state
- Electricity cost for 300 kWh in Montana — Cost for this usage amount in the same state
- Electricity cost for 500 kWh in Montana — Cost for this usage amount in the same state
- Custom usage calculator for Montana — Custom kWh and scenario cost calculation
Appliance and estimator pathways
- Refrigerator cost in Montana — Appliance operating-cost page for this state
- Refrigerator calculator in Montana — Calculator page for adjusting wattage and usage for this appliance
- Space Heater cost in Montana — Appliance operating-cost page for this state
- Space Heater calculator in Montana — Calculator page for adjusting wattage and usage for this appliance
- Window Ac cost in Montana — Appliance operating-cost page for this state
- Window Ac calculator in Montana — Calculator page for adjusting wattage and usage for this appliance
State comparison pathways for Montana
- Compare Montana with other states — State-to-state comparison hub
- Montana vs California electricity cost — Head-to-head comparison page
- Montana vs Florida electricity cost — Head-to-head comparison page
Discovery and navigation hubs
- Montana electricity hub — Guide to this state's electricity rate, usage, comparison, and tool pages
- Electricity cost scenario hub — Entry point for residential and industry scenario pages
- Montana electricity cost overview — State-level electricity cost page with rates and typical bill context
- Montana average electricity bill benchmark — Typical monthly bill estimate using a standard household usage assumption
- Montana electricity bill estimator — Household profile bill scenarios for this state
- Electricity usage hubs — Browse cost pages by common household usage tiers
Consumer electricity drivers
- Price drivers in Montana — Understand what influences state electricity prices
Source & Method
Source: U.S. Energy Information Administration (EIA) Retail Sales of Electricity. Updated: April 2026. Estimates use the EIA average all-in residential rate (delivery included); they don't add separately billed taxes, fixed charges, or other utility fees, which vary by utility. For how rates and estimates are defined, see the methodology hub.