How Much Does a Window AC unit Cost to Run? (2026 Calculator)
Typical setup: 1000 W · 8 h/day · $0.180/kWh
Daily
$1.44
Monthly
$43.15
Yearly
$524.95
Quick rate
Daily cost
$1.44
Monthly cost
$43.15
+$0.00 vs typical
Yearly cost
$524.95
kWh / month
240.0 kWh
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ad-after-calculator Quick answer
A typical window ac unit uses about 1000 W and costs about $1.34/day or $40.32/month at the U.S. average rate of $0.17/kWh, assuming 8 hours of use per day. At the same rate, costs range from about $0.67/day (500 W) to $2.02/day (1500 W).
State explorer
Quickly spot cheapest, highest, and near-average monthly costs.
Top 10 cheapest
Top 10 highest
- Hawaii $95.50
- Massachusetts $74.78
- Maine $73.75
- California $72.70
- Rhode Island $72.34
- New York $68.09
- Connecticut $67.92
- New Hampshire $63.17
- Alaska $61.25
- District of Columbia $56.93
Cost by state (monthly)
At typical 1000 W and 8 h/day. Rates from our dataset (see methodology ). Open a state for a dedicated calculator page.
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ad-after-state-table Wattage range
| Level | Watts | Est. monthly @ avg rate |
|---|---|---|
| Low | 500 W | $21.57 |
| Typical | 1000 W | $43.15 |
| High | 1500 W | $64.72 |
Energy saving tips
- Seal air leaks and improve insulation to reduce run-time.
- Use thermostats or timers so the appliance only runs when needed.
- Combine this appliance with fans or shading to reduce demand.
- Set the thermostat a few degrees higher in summer or lower in winter.
- Use ceiling fans to feel cooler at a higher thermostat setting.
FAQ
- Most window ac unit units fall between 500 W and 1500 W, with 1000 W as a typical operating value for estimates.
- Our estimates use 1000 W as the typical wattage, within a reported range of 500–1500 W.
- At typical use (8 hours/day at 1000 W), the estimate is about 8.00 kWh/day and 240.0 kWh/month at the U.S. average rate.
- With 8 hours/day and 1000 W, this appliance uses about 8.00 kWh per day.
- At 8 hours/day, the monthly estimate is about 240.0 kWh per month.
- Per hour, the typical draw is about 1.000 kWh (at 1000 W).
- At the U.S. average electricity rate of $0.17/kWh, the typical daily cost is about $1.34/day for 8 hours/day.
- At the U.S. average electricity rate of $0.17/kWh, the typical monthly cost is about $40.32/month at 8 hours/day.
- Running for one hour at 1000 W costs about $0.17/hour (using 0.17 $/kWh as the U.S. average).
- With typical use (8 hours/day at 1000 W), the estimate is about $1.34/day or $40.32/month at the U.S. average rate.
- The estimate is about 240.0 kWh per month, which corresponds to roughly $40.32/month at the U.S. average rate. Your real bill depends on your rate and runtime.
- Use energy-saving tips tailored to this appliance. For example: Seal air leaks and improve insulation to reduce run-time. — reducing kWh reduces the bill at your local rate.