Work out what your air conditioner actually costs to run in Australia, per hour, per day, per week, per month and per year, using your own power input and electricity rate.
This calculator does not use a government, state or average Australian electricity rate. Every dollar figure below comes from the power input, hours and rate you enter, or from a clearly labelled estimate that you can replace with your own numbers.
Enter Your Air Conditioner Details
We will convert this to kW for you. For example 1500 W equals 1.5 kW.
Where can I find my AC power input
Look for the rated input, power input, electrical input or a similar figure on the air conditioner's label, specification sheet, manual or manufacturer website. Cooling capacity and electrical input are different figures, so use the electrical input shown on the appliance label or manufacturer specifications when it is available.
This is an indicative range, not your unit's actual rating. Check your air conditioner's specifications when you can and replace this figure for a more accurate result.
Check the usage rate on your latest electricity bill.
These three figures must add up to your total hours per day below. Peak, shoulder and off peak periods depend on your own electricity plan, not a fixed Australian schedule.
Electricity rates vary by retailer, tariff and location. For the most accurate result, enter the usage rate shown on your electricity bill using the single rate option above.
Optional details
Your postcode can help identify the climate conditions that affect air conditioning use. For the most accurate climate classification, check the Australian Energy Rating information for your postcode.
Room size can affect how hard an air conditioner needs to work, but this calculator does not use room size to change the calculated electricity cost.
Lower cooling settings can increase the work your air conditioner needs to do. A moderate cooling setting can help avoid unnecessary electricity use. This setting does not change the calculated dollar result below.
Solar can change the effective cost of electricity used during the day, but this calculator does not estimate solar generation unless you provide that data separately.
Your Estimated AC Running Cost
Time of Use Breakdown, Per Day
Estimated Electricity Use
This is the estimated electricity consumption based on the power input and hours entered. Actual AC electricity use can vary because an air conditioner may cycle rather than operate continuously at its rated input.
Compare Your AC Running Time
These figures use the same power input and electricity rate as above, at different daily hours of use.
How Much Does It Cost to Run Your AC Overnight
Running Cost Guidance for Your AC Type
What This Estimate Does Not Include
This calculator estimates the electricity cost of running your air conditioner. It does not represent your entire electricity bill. An Australian electricity bill can include supply charges, usage charges, different tariff rates, taxes, other charges and the cost of every other appliance running in the household, not just the air conditioner.
Your actual AC cost may be different
An air conditioner may not operate continuously at its rated input. Actual electricity use can vary with outdoor temperature, thermostat setting, insulation, room size, windows, sun exposure, the efficiency of the unit, how often the compressor cycles, the operating mode, your tariff, your electricity retailer and the rest of your household's usage.
How Much Does It Cost to Run an Air Conditioner in Australia
Most Australian households run an air conditioner for at least part of the year, and the running cost comes down to three things: how much power the unit draws, how long it runs, and what you pay per kilowatt hour. There is no single answer that applies to every home, because those three numbers are different for everyone. This calculator works through the maths for you, using your own power input and your own electricity rate, so the result reflects your air conditioner and your bill rather than a generic average.
How This AC Electricity Cost Calculator Works
The calculator above asks for a small number of inputs and keeps the maths straightforward.
AC Power Input
This is the electrical input of the unit, measured in kW, which is the figure the calculator actually needs. If you only have the figure in watts, the calculator converts it for you, since 1500 W is the same as 1.5 kW. Cooling capacity and electrical input are not the same thing, and mixing them up is one of the most common mistakes people make when estimating running costs.
Electricity Rate
Your usage rate, in cents per kWh, is the other half of the sum. This is printed on your electricity bill, and it is worth checking there rather than guessing, since rates vary a lot between retailers, tariffs and states. If you are on a time of use plan, the calculator lets you enter separate peak, shoulder and off peak rates along with the hours you use the AC in each period.
Hours of Use
How many hours a day you run the unit has a direct, proportional effect on the cost, since the calculation simply multiplies power by hours to get kWh.
Days of Use
Days per week lets the calculator work out a realistic weekly, monthly and yearly figure rather than assuming the unit runs every single day.
How Much Does an Air Conditioner Cost Per Hour
The hourly cost is the simplest figure to calculate: power input in kW multiplied by your rate in dollars per kWh. For example, a 1.5 kW unit on a 30 c/kWh rate costs about 45 cents an hour while it is drawing its full rated input. This is the building block for every other figure on this page, since the daily, weekly, monthly and yearly estimates are all this hourly figure scaled up by hours and days.
How Much Does an Air Conditioner Cost Per Day
Daily cost is the hourly figure multiplied by however many hours you actually run the unit. A 1.5 kW air conditioner running for 8 hours at 30 c/kWh uses 12 kWh and costs around 3 dollars and 60 cents for that day. Multiply that by the number of days you actually use it in a week, rather than assuming every day is the same, for a more realistic weekly total.
How Much Does an Air Conditioner Cost Per Month
The calculator's monthly figure is a 30 day estimate based on your weekly pattern, so it is a planning number rather than a guaranteed figure for any specific calendar month, since months are not all the same length and usage rarely stays perfectly constant. For a broader look at how this fits into your overall account, the monthly electricity bill calculator can help you estimate your monthly electricity bill as a whole, not just the air conditioning portion.
How Much Does It Cost to Run an AC Overnight
Overnight running cost works the same way as any other block of hours, using your power input and rate for however many hours the unit runs overnight. The default in the calculator above is 8 hours, which you can change to match your own routine. Many households also run their AC at a lower duty on an off peak tariff overnight, which is one reason it is worth entering your actual off peak rate separately if you are on a time of use plan.
How Much Electricity Does an Air Conditioner Use
Electricity use is measured in kWh, and it is calculated as power in kW multiplied by hours run. A 1.5 kW unit running for 8 hours uses 12 kWh that day, scaling up to 84 kWh a week and around 360 kWh a month if that pattern holds every day. These figures assume the unit draws its full rated input the whole time it is switched on, which is a simplification, since most units cycle once they reach the set temperature rather than running flat out continuously.
Cooling Capacity Versus Electrical Input
Cooling capacity is not the same as electrical input. An air conditioner might be sold and labelled as a 5 kW unit, referring to how much cooling it can deliver, while its actual electrical input, the figure that determines running cost, is a different and generally lower number. There is no single universal conversion between the two that applies to every unit, since efficiency varies by brand, model and age. For the running cost calculation, the electrical input is the number that matters, and it is worth tracking down on the compliance plate, spec sheet or manual rather than relying on the capacity figure alone.
Does AC Type Affect Running Cost
Split System
A split system's running cost depends on its electrical input, how long it operates, the thermostat setting, outdoor conditions, how efficient the particular system is, and your electricity tariff. Two split systems with the same cooling capacity can have different running costs if their electrical input differs.
Portable Air Conditioner
For a portable unit, the rated electrical input listed in the appliance specifications is the useful number for a running cost estimate, in the same way as any other AC type.
Window Air Conditioner
Window units should also be assessed using the rated electrical input taken from the appliance label or specifications, rather than any capacity figure printed more prominently on the box.
Ducted Air Conditioning
Ducted systems can behave differently from a single split system because running cost can vary depending on the size of the system and which zones are actually operating at a given time. A ducted system with several zones switched off will generally use less than one running every zone at once, even though the installed capacity is the same either way.
Does Your Electricity Rate Change the Cost
Yes, directly and proportionally. Doubling your rate doubles the dollar cost for the same amount of electricity used, which is why using your own rate rather than a guessed figure matters more than almost any other input in this calculator. If you want to understand how a bill is built up more generally, how to calculate your electricity bill walks through the method step by step.
What Is Time of Use Electricity Pricing
A time of use tariff charges a different rate depending on when electricity is used, usually split into peak, shoulder and off peak periods. The actual times and rates for each period depend on your own electricity plan and retailer, not a single fixed Australian schedule, so it is worth checking your bill for the periods that apply to you. If a large share of your AC use falls in a cheaper off peak or shoulder window, your effective cost per kWh can end up noticeably lower than a flat single rate plan, which is exactly what the time of use option in this calculator is built to show.
Does Your AC Temperature Setting Affect Electricity Use
A lower cooling setting can increase the work your air conditioner needs to do, since the unit has to work harder and for longer to reach and hold a colder temperature. A moderate setting can help avoid unnecessary electricity use. This calculator does not apply an invented percentage saving for a particular temperature, since the real effect depends on your home, the outdoor conditions and the unit itself, but the general direction, colder settings generally meaning more electricity use, is worth keeping in mind when you are deciding what temperature to run.
Does Room Size Affect AC Running Cost
Room size can affect how hard an air conditioner needs to work to reach a given temperature, but this calculator does not turn room size into an automatic change in the calculated electricity cost, since there is no reliable universal formula linking the two. A correctly sized unit for a larger room may run more efficiently than an undersized unit struggling to cool the same space, which is a sizing question rather than something a running cost calculator alone can answer.
Does Solar Change the Cost of Running an Air Conditioner
If you have solar panels and you run your air conditioner during the day while your system is producing electricity, the effective cost of that electricity can be different from electricity bought from the grid, depending on how your solar system and electricity plan work. This calculator does not estimate your solar generation, since that depends on your system size, orientation and the weather on a given day, so it simply asks whether you have solar and roughly how much of your AC use overlaps with solar production, as context rather than as a dollar adjustment.
Why Your Actual AC Cost May Be Different
Every figure above is an estimate built from the numbers you entered. Real air conditioners cycle on and off, or ramp power up and down, rather than running at a constant rated input for the entire time they are switched on, so actual use will usually differ somewhat from a simple power multiplied by hours calculation. Outdoor temperature, your thermostat setting, how well insulated the room is, windows and sun exposure, the efficiency of your particular unit, your tariff and retailer, and the rest of your household's electricity use all play a part in what finally shows up on your bill.
How to Check Your AC Running Cost From Your Electricity Bill
Your bill will not usually show the air conditioner as its own line item, but you can get a reasonable sense of its contribution by comparing your usage during a period when the AC ran heavily against a similar period when it did not. If you want to understand your overall household electricity use rather than just the air conditioner, an energy cost calculator can help you estimate your energy cost across your whole home, and the broader energy calculator is useful if you want to work through other appliances the same way.
Ways to Manage Air Conditioning Electricity Use
A few practical things tend to make the biggest difference: a sensible thermostat setting rather than the coldest available option, closing doors and curtains to keep conditioned air in and outdoor heat out, keeping filters clean so the unit does not have to work harder than necessary, and checking whether a time of use tariff could shift some of your usage to a cheaper period. If you are looking at your electricity costs more broadly, ways to save money on electricity and how to decrease your electricity bill cover other household changes beyond air conditioning. If you are comparing air conditioning against other heating and cooling options, a heat pump savings calculator is worth a look. For understanding the kW figure itself, how to calculate kW explains the unit in more detail, and the full set of tools is available through electricity cost calculators.
Frequently Asked Questions
How much does it cost to run an air conditioner in Australia
It depends on the unit's electrical input, how many hours it runs, and your own electricity rate. There is no single figure that applies to every household, which is why this calculator asks for your own numbers rather than assuming a national average.
How much does an air conditioner cost per hour in Australia
Multiply the electrical input in kW by your electricity rate in dollars per kWh. A 1.5 kW unit on a 30 c/kWh rate costs about 45 cents an hour while running at its rated input.
How much does it cost to run AC for 8 hours
Multiply the hourly cost by 8. For a 1.5 kW unit at 30 c/kWh, 8 hours works out to about 3 dollars and 60 cents, based on 12 kWh of electricity use for that stretch.
How much does it cost to run an AC overnight
It depends on how many hours overnight and whether you are on an off peak rate for that time. Use the overnight section of this calculator with your own hours and rate for an estimate specific to your situation.
How much does a 5 kW air conditioner cost to run
A 5 kW figure usually refers to cooling capacity, not electrical input, so the actual input power, and therefore the running cost, depends on the specific unit. Check the compliance plate or specifications for the electrical input, or use the estimated mode in this calculator if you only know the capacity.
How much does a 7 kW air conditioner cost to run
The same applies here: 7 kW is typically a capacity figure, and the running cost depends on the unit's actual electrical input, which is usually lower than the capacity number and varies by model.
How much does a split system cost to run
It depends on the system's electrical input, how long it runs, the thermostat setting, outdoor conditions, the efficiency of the particular system, and your electricity tariff. Two split systems with similar capacity can have different running costs.
How much does ducted air conditioning cost to run
Ducted system running cost can vary with the size of the system, how long it operates, and which zones are actually switched on, since running every zone at once uses more electricity than running a single zone.
How much electricity does an air conditioner use
Electricity use in kWh equals power in kW multiplied by hours run, though real world use can be lower than this simple calculation if the unit cycles rather than running continuously at full input.
Is it expensive to run an air conditioner all day
Running any appliance for more hours increases the total cost, since the calculation scales directly with hours used. Whether that counts as expensive depends on the unit's power input, your electricity rate, and your own budget.
Does setting the AC colder use more electricity
A lower cooling setting can increase how hard the unit has to work, which generally means more electricity use, though this calculator does not apply a fixed percentage for a given temperature since the real effect depends on your home and the outdoor conditions.
How do I calculate my air conditioner's running cost
Multiply the electrical input in kW by the hours you run it to get kWh, then multiply that by your electricity rate. This calculator does that automatically using your own inputs, but it is an estimate rather than an exact bill, since real units cycle and other factors affect actual use.
0 Comments