Typical electricity cost
How much does an Evaporative Cooler cost to run?
Based on typical usage
An Evaporative Cooler typically uses about 250 watts, costing around $0.04 per hour at $0.15 per kWh.
At typical use (8 hours per day), that's about $9.00 per month and $36.00 for a typical 4-month cooling season.
Based on
- 250 watts
- 8 hours per day
- $0.15 per kWh
- 4-month cooling season
What affects cost most
- Average hours used per day
- Electricity rate in dollars per kWh
- How many active days or months the device runs each season
- Weather, insulation, and thermostat behavior
How it works: Daily cost uses wattage, hours per day, and electricity rate. Monthly uses daily × 30; cooling season uses monthly × 4.
Use the calculator below to estimate cost based on your own wattage, usage time, and electricity rate.
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How Much Electricity Does an Evaporative Cooler Use?
These example monthly costs show how active-season runtime changes the bill faster than small wattage differences do.
Example monthly costs
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Light Use 4.8 hours per day$5.40/month
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Typical Use 8 hours per day$9.00/month
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Heavy Use 11.2 hours per day$12.60/month
Get a better estimate and keep costs down
Defaults are a starting point. Real cost changes most when runtime, wattage, and your electricity rate differ from the benchmark assumptions.
What changes cost most
- Average hours used per day
- Electricity rate in dollars per kWh
- How many active days or months the device runs each season
- Weather, insulation, and thermostat behavior
How to get a better estimate and lower cost
- Replace the default electricity rate with the actual rate from your latest power bill.
- Adjust daily runtime to match how long you actually use the equipment.
- Run the fan at the lowest setting that keeps rooms comfortable.
- Maintain pads and water flow for efficient cooling.
- Use natural ventilation when outdoor conditions are favorable.
- Turn the unit off when spaces are unoccupied.
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