What Does It Cost to Run a Window AC in South Dakota?
Running a window ac in South Dakota costs about $31.36 a month — $381.59 a year — at the state's average rate of 14.52 ¢/kWh. That's roughly $126.14 a year less than a household paying the national average pays for the exact same window ac. The estimate assumes a typical 900-watt window ac running 8 hours/day, at the all-in average rate (before separately billed taxes and fixed fees).
Key metrics
| Metric | Value |
|---|---|
| Average wattage assumption | 900 W |
| Typical usage assumption | 8 hours/day |
| Estimated monthly electricity use | 216.0 kWh |
| Estimated monthly cost | $31.36 |
| Estimated yearly cost | $381.59 |
Window AC cost vs U.S. average
At the state average rate, a window ac in South Dakota costs $10.37 less a month than it would at the U.S. average rate.
How much electricity does a window ac use?
A window ac draws roughly 500-1,500 W; we use 900 watts running 8 hours/day. That comes to 7.20 kWh a day — 216.0 kWh a month, or 2628.0 kWh over a year — using kWh = watts × hours ÷ 1000.
A window unit clicks on and off with the thermostat, so what it actually costs you rises and falls with the weather and where you set the dial. Nudging it up a couple degrees on a hot afternoon is the easiest way to spend less. South Dakota prices that energy at 14.52 ¢/kWh, against a 19.32 ¢/kWh national average.
Window AC operating cost estimate in South Dakota
| Time period | Energy use | Cost |
|---|---|---|
| Per hour | 0.90 kWh | $0.13 |
| Per day | 7.20 kWh | $1.05 |
| Per month | 216.0 kWh | $31.36 |
| Per year | 2628.0 kWh | $381.59 |
These figures use the all-in average rate. Your actual bill can run higher when separately billed taxes, seasonal pricing, and fixed monthly fees apply.
What changes the cost the most?
Two things move this number: your state's rate, which you can't change, and how hard the appliance works, which you often can. For a window ac, that mostly comes down to BTU size, climate, thermostat setting.
Using yours more lightly or heavily than our assumption? The state calculator and usage-cost pages below model your exact scenario at the same rate.
For calculator-style comparisons, use the Window AC calculator in South Dakota to compare light, typical, and heavy usage profiles.
Comparison entry points
Browse related comparisons from the energy comparison hub:
Related appliance cost pages for South Dakota
- Space Heater cost in South Dakota — Typical 750-1,500 W estimate with state-specific pricing
- Portable AC cost in South Dakota — Typical 700-1,400 W estimate with state-specific pricing
- Central AC cost in South Dakota — Typical 2,000-5,000 W estimate with state-specific pricing
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State cost and bill pathways for South Dakota
- Average power price in South Dakota — What a kWh of electricity costs in South Dakota
- South Dakota electricity rates — Core authority page with statewide pricing context
- Electricity cost in South Dakota — State-level cost, affordability, and value overview
- South Dakota monthly electricity bill estimate — What a typical monthly bill looks like
- Electric bill estimator scenarios in South Dakota — Estimate your bill from your monthly usage
- South Dakota data profile — Machine-readable state profile and metrics
Historical and trend pages
- Historical electricity prices in South Dakota — Historical context and trend interpretation
- Electricity inflation in South Dakota — State electricity inflation analysis
- South Dakota electricity price volatility — Volatility and rate movement profile
Fixed-usage and calculator pathways
- 300 kWh cost in South Dakota — Cost for this usage amount in the same state
- 100 kWh cost in South Dakota — Cost for this usage amount in the same state
- 500 kWh cost in South Dakota — Cost for this usage amount in the same state
- Custom usage calculator for South Dakota — Custom kWh and scenario cost calculation
Appliance and estimator pathways
- Refrigerator cost in South Dakota — Appliance operating-cost page for this state
- Refrigerator calculator in South Dakota — Calculator page for adjusting wattage and usage for this appliance
- Space Heater cost in South Dakota — Appliance operating-cost page for this state
- Space Heater calculator in South Dakota — Calculator page for adjusting wattage and usage for this appliance
- Window Ac cost in South Dakota — Appliance operating-cost page for this state
- Window Ac calculator in South Dakota — Calculator page for adjusting wattage and usage for this appliance
State comparison pathways for South Dakota
- Compare South Dakota with other states — State-to-state comparison hub
- South Dakota vs California electricity cost — Head-to-head comparison page
- South Dakota vs Florida electricity cost — Head-to-head comparison page
Discovery and navigation hubs
- South Dakota 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
- South Dakota electricity cost overview — State-level electricity cost page with rates and typical bill context
- South Dakota average electricity bill benchmark — Typical monthly bill estimate using a standard household usage assumption
- South Dakota 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 South Dakota — 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.