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AC Electricity Cost Calculator

Estimate air conditioner running cost by tonnage and hours.

Inputs

Inputs and assumptions

Nameplate or BTU/SEER math: 2-ton about 2400W, 3-ton about 3500W, window unit 900-1400W.

How many of this device you run.

Hours per day

Fridges run 7; laundry may run 2-3.

Compressors and thermostats cycle; a fridge averages ~40%.

Rate

Result

Cost per year
$1,216.18
Energy per year
7,154 kWh
Share of average US home
68.0%
Cost per running hour
$0.417
Cost per day
$3.33
Energy per day
19.6 kWh
Cost per month
$99.96
Screening tool. Verify your utility tariff and equipment specs before deciding.

Frequently asked questions

How much does AC cost per hour?

Divide BTU by SEER for watts, then multiply by your rate. A 3-ton 14-SEER unit draws about 2,600W, near 44 cents per hour at 17 cents per kWh.

What size AC do I need?

Roughly 20 BTU per square foot. Oversized units short-cycle and waste energy on humidity.

Does a higher SEER pay back?

Each SEER point cuts cooling energy about 7 percent. Compare the price premium against annual savings.

How can I cut AC cost?

Raise the setpoint 2 to 3 degrees, clean filters monthly, and pre-cool off-peak on TOU plans.

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Guides

01 Which Appliances Cost the Most to Run? 2026 Cost Guide 02 How to Read Your Electric Bill: Charges, Rates, and Meter Readings

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