APPLIANCE COST GUIDE
How much does a window air conditioner cost to run?
Window air conditioner cost depends on compressor runtime, not only how long its controls are on.
Editable estimate
Calculate running cost
Results update as you type.
Estimated monthly cost—30-day month
Daily—
Annual—
Daily energy—
Annual energy—
kW × effective runtime × rate. Effective runtime = hours/day × duty cycle.
Ways to lower this cost
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RATE COMPARISON
How your rate changes the cost
Same appliance inputs, using May 2026 EIA residential averages.
Data updatedEIA residential prices · May 2026View Table 5.6.A
Make the estimate more accurate
- Find rated watts on the EnergyGuide label or model specification.
- Clean filters and keep outdoor coils clear.
- Use a higher duty cycle during heat waves.
Presets are estimates. Use your model label, an EnergyGuide figure or a safe meter reading when available.