How to use this calculator
- Find rated input power in kW on the label or product sheet.
- Enter expected hours per day and days used.
- Select a cycling scenario instead of assuming full load continuously.
- Enter your own electricity usage rate.
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Air Conditioner Running Cost Calculator Australia
Estimate Australian air-conditioner running cost in AUD from rated input power, hours, cycling, climate scenario and electricity rate.
LIFESTYLE & HOMEEstimate the incremental electricity cost of running an air conditioner using its rated input power rather than US-only BTU and SEER assumptions.
Australian appliance labels and product sheets commonly provide input power or annual energy figures. The duty-cycle scenario allows for the compressor cycling instead of treating every selected hour as continuous full-load operation.
Disclaimer: Actual use depends on climate zone, thermostat setting, room size, insulation, humidity, equipment sizing and part-load efficiency. Check the Energy Rating label for model-specific comparison data.
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Calculator information
Air-conditioner running cost
Cost = input kW × hours/day × days × duty cycle × $/kWh- Duty cycle is the share of selected time spent at equivalent full input.
- Low and high results use a 15 percentage-point duty-cycle band.
Worked example: Typical monthly cooling scenario
Given:
- 2.5 kW rated input
- 8 selected hours/day for 30 days
- 55% duty cycle
- $0.35/kWh
Steps:
- Energy: 2.5 × 8 × 30 × 0.55 = 330 kWh
Result: Estimated incremental running cost: $115.50.
Frequently asked questions
Why is rated cooling capacity not used as electricity input?
Cooling capacity describes heat moved. Running cost needs electrical input power or measured energy use.
What duty cycle should I use?
Use a lower scenario for a mild day or well-insulated room and a higher scenario for hot, humid conditions. It is an explicit assumption, not a state tariff.
Does the result include the daily supply charge?
No. This estimates the extra cost caused by the air conditioner; the fixed supply charge exists whether or not it runs.
Sources & references
- Air conditioner energy consumption and running costs — Australian Government — Energy Rating
- Find the best energy deal and understand bill charges — Australian Government — energy.gov.au
Last updated: 13 July 2026
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