Air conditioner running cost calculator
Estimated variable cost
2.12CHF*
for 1 day of use
0.27 CHF / hour2.12 CHF / day8.0 kWh
* Swiss median tariff 2027 (ElCom): 0.265 CHF/kWh excl. VAT, check for your municipality · excluding fixed charges
Your estimate
Calculate
kWh = electrical kW × hours/day × days × factor/100. CHF = kWh × tariff. The factor simplifies cycling and does not separately model the fan. Editable examples, excluding fixed charges. Use your actual tariff.
Sources and methodology
kWh = electrical kW × hours/day × days × factor/100. CHF = kWh × tariff. The factor simplifies cycling and does not separately model the fan. Editable examples, excluding fixed charges. Use your actual tariff.
Default tariff: Swiss median overall tariff for 2027 for a typical household (profile H4, 4,500 kWh a year), published by ElCom on 8 September 2026, excluding VAT. FREATH ONE 14 input: 1.5 kW, value not confirmed; the FREATH ONE 12 figure has not yet been declared.
The cost is clear. And the right capacity?
Your questions, answered
Is CHF 0.265/kWh an official tariff?
No. It is the Swiss median for 2027 published by ElCom for a typical household (4,500 kWh a year), excluding VAT: an editable example value. Your tariff depends on your municipality and supplier; use the total variable tariff on your bill.
Is the result a bill forecast?
No. It is a simplified scenario excluding fixed charges and other appliances.
How much does one night of air conditioning cost in CHF?
An example, not a universal Swiss tariff: an average electrical draw of 1 kW for 8 hours at CHF 0.30/kWh costs CHF 2.40. At an average 0.5 kW it would cost CHF 1.20. Use your own tariff and measured consumption, rather than cooling capacity.
How much would 30 nights of cooling cost?
At an average electrical draw of 1 kW, 8 hours per night and CHF 0.30/kWh, the result is 240 kWh or CHF 72. This is an illustrative scenario. Weather, insulation, target temperature and actual operating time change consumption.
How can I measure actual electricity use?
Record energy in kWh over a representative period with a meter rated for the appliance. Multiply the reading by your tariff. Several days capture variation better than a single instantaneous watt reading.
Can I leave a portable air conditioner running overnight?
Yes, if the manual permits that use and the unit is installed correctly, with heat exhausted outdoors, clear air openings and suitable condensate handling. Night mode does not necessarily stop the compressor. Cooling before bedtime and using a timer may suit noise-sensitive sleepers better.