Fan vs air conditioner cost
Compare the entered electricity costs of a fan and an air conditioner.
After you calculate
Compare your cooling running costs
Add your fan and air conditioner energy use, hours and prices, then calculate to see your results.
Fan running cost
Shown after calculationAir conditioner cost
Shown after calculationElectricity use
Cost difference
Full calculation
The comparison uses your entered running pattern for each cooling option.
Understand your estimate
How it works
Compare the entered electricity costs of a fan and an air conditioner. Enter a daily schedule for each and the number of operating days per year. The two appliances can have different hours and operating shares. The result applies the same selected electricity price to both.
Find each appliance’s electrical input in watts. Use the maker’s figure for the setting you intend to use, or a suitable measurement. Air conditioner cooling capacity is heat moved, not electrical input. Do not put a cooling-capacity rating into the power field. Personal power and schedule fields start empty so example values never become your routine.
A few good questions
Before youget started.
Understand this calculator, the figures to enter and the limits of your estimate.
Sources
- AER Default market offer 2026-27 final determination, appendix C, section 9(1), printed page 118Checked on 12 October 2026
- ESC Victorian Default Offer 2026-27 price determination, Schedule 1, printed page 9Checked on 12 October 2026
- Australian Government: calculate appliance energy costsChecked on 13 October 2026
- Australian Government: heating and cooling sizing guidanceChecked on 13 October 2026
- Last checked
- 14 October 2026
- Rates as of
- 1 July 2026
EnergySums
Fan vs air conditioner cost
Australia · How it works
- Guide updated
- 14 October 2026
- Rates as of
- 1 July 2026
| Item | Value |
|---|---|
| Guide updated | 14 October 2026 |
| Rates as of | 1 July 2026 |
How it works
Compare the entered electricity costs of a fan and an air conditioner. Enter a daily schedule for each and the number of operating days per year. The two appliances can have different hours and operating shares. The result applies the same selected electricity price to both.
Find each appliance’s electrical input in watts. Use the maker’s figure for the setting you intend to use, or a suitable measurement. Air conditioner cooling capacity is heat moved, not electrical input. Do not put a cooling-capacity rating into the power field. Personal power and schedule fields start empty so example values never become your routine.
Formula
Annual input energy = electrical watts ÷ 1000 × hours per day × operating share × operating days. Multiply each appliance energy by the same selected electricity price.
Use a percentage as a fraction once: for example, 50% means 50 ÷ 100 = 0.5. Use 0.5 in the energy formula; do not divide it by 100 again.
The operating share is the part of the entered daily hours when the appliance draws the stated power. For the air conditioner, use a compressor-on share that matches its power figure. If a measurement already gives average power over those hours, do not apply the same reduction again.
Watts measure power at one moment. Divide by 1000 to get kilowatts, then multiply by hours to get kilowatt-hours, written kWh. Multiply by the share and operating days. Electricity prices in cents per kWh are divided by 100 to get Australian dollars. The yearly cost repeats that schedule rather than predicting local weather.
Worked example
These illustrative inputs are separate from your saved answers. Prices, use and performance are held constant for this worked scenario; they are not personal defaults.
Inputs used in this worked example.
- Electricity price
- My bill rate
- Electricity unit price
- 30 c / kWh
- Operating days
- 180 days / year
- Fan electrical input
- 50 W
- Fan use
- 8 hours / day
- Fan operating share
- 100 %
- Air conditioner electrical input
- 1000 W
- Air conditioner use
- 8 hours / day
- Air conditioner compressor-on share
- 50 %
- Price conversion
- 100 pence or cents per currency unit
| Item | Value |
|---|---|
| Electricity price | My bill rate |
| Electricity unit price | 30 c / kWh |
| Operating days | 180 days / year |
| Fan electrical input | 50 W |
| Fan use | 8 hours / day |
| Fan operating share | 100 % |
| Air conditioner electrical input | 1000 W |
| Air conditioner use | 8 hours / day |
| Air conditioner compressor-on share | 50 % |
| Price conversion | 100 pence or cents per currency unit |
- Fan / year
- $21.60
- Air conditioner / year
- $216.00
- Saving with Air conditioner / year
- -$194.40
| Item | Value |
|---|---|
| Fan / year | $21.60 |
| Air conditioner / year | $216.00 |
| Saving with Air conditioner / year | -$194.40 |
- Annual fan electricity
- 50 W ÷ 1,000 W/kW × 8 h/day × (100 ÷ 100) × 180 days= 72 kWh
- Annual AC electricity
- 1,000 W ÷ 1,000 W/kW × 8 h/day × (50 ÷ 100) × 180 days= 720 kWh
| Calculation | Formula with saved values | Result |
|---|---|---|
| Annual fan electricity | 50 W ÷ 1,000 W/kW × 8 h/day × (100 ÷ 100) × 180 days | 72 kWh |
| Annual AC electricity | 1,000 W ÷ 1,000 W/kW × 8 h/day × (50 ÷ 100) × 180 days | 720 kWh |
Assumptions and limits
A fan and an air conditioner provide different cooling effects. The comparison does not assume equal cooling output or decide how much cooling the room needs. Lower entered cost does not show that a fan can replace air conditioning in every situation.
Use an electrical rating for the chosen setting and conditions. A maximum input, a measured average and an annual label energy figure are different quantities. The tool does not turn a cooling-capacity rating into electrical watts or supply a guessed efficiency. Each schedule and operating share must come from your own evidence.
The estimate holds the daily pattern and unit price constant across the entered days. It does not add a climate forecast, purchase price, installation, servicing or replacement. Existing supply charges are excluded from this extra-use comparison. Money is rounded for display. An invalid edit leaves the last valid estimate visible with a warning.
Country rules
Australian published defaults use the stored AER or Victorian regulator record for the selected electricity network. These are dated reference prices and may differ from your contract. Use a tax-inclusive bill price where it better matches the appliance’s operating hours.
A flat price does not model different time-of-use windows. If your plan varies by time, check that the price used represents the schedule you are testing. Source dates identify the stored rate or method; they do not verify an equipment rating, room condition or personal schedule. No live price is fetched while using the page.
When to ask a professional
Ask the maker if you cannot identify the electrical input or the relevant operating setting. Take the model number and technical sheet, rather than relying only on a cooling-capacity label.
Ask a qualified installer about room cooling needs, equipment capacity and electrical work. Bring the entered schedules and cost breakdown. This comparison cannot assess installation safety or confirm that either option supplies the cooling your home needs. Follow each appliance’s instructions.
Questions and answers
| Question | Answer |
|---|---|
| Where should I find my inputs? | Use metered usage, published equipment documentation or an installer assessment that matches the conditions being compared. Do not use a nameplate maximum as measured average consumption. |
| Does this predict my future bill? | No. It estimates the entered scenario using its selected prices and performance. Weather, behaviour, price changes and equipment condition can change actual costs. |
| Can I use my own prices? | Yes. Use prices from your bill or quote, including applicable tax. Keep units consistent. Existing fixed supply charges are excluded unless the form explicitly asks for them. |
| Are the worked-example inputs defaults? | No. The worked example is a hand-checked illustration, not typical property data. Enter your own equipment and usage information. |
Sources
| Source | Checked | Reference URL |
|---|---|---|
| AER Default market offer 2026-27 final determination, appendix C, section 9(1), printed page 118 | 12 October 2026 | https://www.aer.gov.au/system/files/2026-05/AER%20-%20Final%20determination%20-%20Default%20market%20offer%202026%E2%80%9327.pdf |
| ESC Victorian Default Offer 2026-27 price determination, Schedule 1, printed page 9 | 12 October 2026 | https://www.esc.vic.gov.au/sites/default/files/documents/Victorian%20Default%20Offer%202026-27%20Price%20Determination.pdf |
| Australian Government: calculate appliance energy costs | 13 October 2026 | https://www.energy.gov.au/households/energy-rating |
| Australian Government: heating and cooling sizing guidance | 13 October 2026 | https://www.energy.gov.au/households/heating-and-cooling |