Room climate · Electricity cost calculator
How much does Portable air conditioner cost to run?
Calculate the approximate electricity cost of a portable air conditioner based on its power and daily runtime.
Example calculation
Typical values for Portable air conditioner
These values are a useful starting point for the calculator, but they are not guaranteed consumption figures for your specific model.
Power
1200 W
Duration/use
240 min
Uses/week
5
Example/year
€436.80
About the data
Typical value for a portable monoblock unit. Cooling capacity, room temperature, thermostat cycles and the window seal affect actual consumption.
Example using €0.35/kWh. This works out to approximately €1.68 per use, €36.40 per month and 1,248.0 kWh per year.
Your values
Portable air conditioner electricity cost calculator
Adjust the suggested values to match your own device, electricity tariff and actual usage.
Adjust usage
Typical value – check the rating on your device if possible.
Suggested starting value – adjust it to match your usage.
You can find your electricity price on your electricity bill.
Choose week or month. Half steps such as 0.5 are supported.
Your yearly cost
€36.40
Per month
€8.40
Per week
Choose how often you would use the device in the selected period.
Calculation basis
1,200 W ÷ 1.000 × 240 min ÷ 60 × 5 per week × 52 × €0.35/kWh
Context: Estimated values – actual consumption may vary.
Energy-saving tip
Keep windows and doors closed while it is running and seal the exhaust hose at the window as well as possible.
Practical guideHow much does a portable air conditioner cost to run?
Portable monoblock units exhaust warm air through a hose. Input power, daily runtime, room size, outdoor temperature and window sealing all affect actual consumption.
At 1,200 watts for four hours, the simple calculation gives 4.8 kWh or €1.68 per cooling day at €0.35 per kWh. Thermostat cycles may reduce measured consumption.
Seasonal electricity costs compared
Uses per week are shown as an annual average, making it possible to spread individual cooling days across the year.
26 cooling days/year
occasional use
€43.68
Electricity cost per year
0.5 Uses per week
52 cooling days/year
regular summer use
€87.36
Electricity cost per year
1 Uses per week
104 cooling days/year
frequent use
€174.72
Electricity cost per year
2 Uses per week
Measure power and runtime correctly
Electrical input power is shown on the rating plate or data sheet and is not the same as cooling capacity. Enter average active runtime. A suitably rated electricity meter used over several hot days gives the most representative value.
Portable or split air conditioner?
Split systems can be more efficient and quieter, but require permanent installation. Compare runtime, room performance and seasonal efficiency as well as wattage.
Calculate a split air conditioner's cost >Frequently asked questions about portable air conditioners
What does a four-hour cooling day cost?
At 1,200 watts and €0.35 per kWh, the simple calculation is about €1.68. Thermostat cycles and room conditions may change the measured value.
Why does window sealing matter?
Warm air can flow back through an open or poorly sealed window, forcing the unit to operate for longer.
How do I calculate summer-only use?
Divide your expected cooling days per year by 52 and enter the result as average uses per week.
Sources and guidance
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