Air Conditioner Power Consumption Calculator [1, 1.5, 2 Ton AC Energy Bill Estimator]

Air conditioner power consumption calculator is used to calculate the bill cost for any AC. Enter the ton/BTU of AC, daily operating hours and cost per unit. Daily, monthly, and yearly cost will be calculated.

List of Contents


Top 10 AC Brands of World

  1. Daikin
  2. Hitachi
  3. Blue Star
  4. Carrier
  5. Whirlpool
  6. Voltas
  7. Panasonic
  8. LG
  9. Samsung
  10. Electrolux

What do you mean by a ton in Air conditioners

Air conditioners are often described in terms of their heat extraction capacity. One ton of refrigeration (TR or TR) is the heat extraction capacity that equals 12000 BTU or 3.5 kW.

Commonly available Tons, BTU and Estimated kWH table

Ton BTU kW
1 12000 1.2
1.5 18000 1.8
1.8 21600 2.16
2 24000 2.4
2.5 30000 3
3 36000 3.6
3.5 42000 4.2
4 48000 4.8
4.5 54000 5.4
5 60000 6
5.5 66000 6.6
6 72000 7.2
6.5 78000 7.8
7 84000 8.4
7.5 90000 9
8 96000 9.6
8.5 102000 10.2
9 108000 10.8
9.5 114000 11.4
10 120000 12

Frequently asked questions

Question: Estimate the monthly cost of 1 Ton AC that runs for 3 hours daily, If the bill is charged at $0.05/kWh

Answer: 1 ton ac = 1200 watt = 1.2 kW

kWh For 3 hours daily = 3 * 1.2 kWh = 3.6 kWh

At rate of $0.05/kWh bill becomes = 3.6 kW * $0.05/kWh = $0.18

Question: Estimate the running cost of 1.5 Ton AC for 5 hours daily @ rate $0.1/kWh

Answer: 1.5 Ton ac = 1800 watt = 1.8 kW

kWH for 5 hours = 5 * 1.8 kWh = 9 kWh

At rate of $0.1/kWh bill is = 9 kWh * $0.1/kWh = $0.9

Question: Estimate the running cost of 2 Ton AC for 3 hours daily when @ rate $0.2/kWh.

Answer: 2 Ton ac = 2400 watt = 2.4 kW

kWh for 3 hours = 3 * 2.4 kWh = 7.2 kWh

At rate of $0.2/kWh = 7.2 kWh *$0.2/kWh = $1.44

Question: What is inverter AC?

The inverter air conditioner (AC) is an advanced type of air conditioning unit that uses advanced technology for providing efficient and effective cooling. Unlike traditional split and window units ACs (which utilize fixed speed compressors), inverter ACs use a variable speed compressor that can adjust its cooling capacity according to indoor temperature requirements.

Working of Traditional Non-Inverter ACs

Conventional air conditioners turn off their compressors once the desired temperature is achieved, but this results in frequent on-and-off cycles when the temperature rises again, leading to increased energy consumption. Additionally, the cooling is often inadequate as the compressor doesn’t start at high RPMs. Consequently, the cooling process takes longer, and the room is never optimally cooled.

Working of Inverter ACs

On the other hand, an Inverter AC operates on the principle of starting with high RPMs, which requires more power initially. However, once the desired temperature is achieved, the RPMs automatically decrease thereby optimizing the unit’s performance without the need to turn it on and off. The repeated on-and-off cycles of any device lead to increased power consumption. Furthermore, by not turning the Inverter AC on and off, there are minimal or no temperature fluctuations, ensuring optimal comfort levels. Additionally, the high initial RPMs of the Inverter AC, which are later optimized, resulting in less power consumption and savings on electricity bills.

Working Principle of Inverter ACs

The inverter ACs operate on the principle of changing the frequency of the input power supply to control the speed of the compressor motor. When the desired temperature is achieved, the compressor slows down, resulting in less power consumption and reduced wear and tear on the compressor.

Advantages of Inverter ACs

Inverter ACs offer several advantages over traditional window and split units ACs. Given below is abrief overview of these benefits:

  1. Energy efficiency: Inverter ACs are more energy-efficient than traditional ACs, as they adjust their cooling capacity based on the room’s temperature, reducing power consumption and saving energy.

  2. Faster cooling: Inverter ACs can cool the room faster than traditional ACs, as they can operate at high speeds during the initial cooling stage.

  3. Quieter operation: Inverter ACs operate at lower noise levels than traditional ACs, as the variable speed compressor produces less noise.

  4. Longer lifespan: The reduced wear and tear on the compressor in inverter ACs results in a longer lifespan for the unit.

Overall, inverter ACs provide better cooling performance, increased energy efficiency, and a longer lifespan than traditional ACs, making them a popular choice for modern households and commercial spaces.

Question: Is there any specific inverter ac power consumption calculator

No, however, inverter-based Air conditioners are generally 40% more efficient as compared to non-inverter AC units.

1, 2, 3, 4 Star Air Conditioner Power Consumption

Given below is the power consumption of different split-type air conditioners based on the star rating. The below chart is a general one and may not be specifically applicable. Always look for your manufacturer’s manual. Some countries use 5-star or 10-star ratings and your ac power consumption can be different.

Star rating 1 Ton 1.5 Ton 2 Ton
1 Star 1100W 1651W 2200W
2 Star 1036W 1554W 2071W
3 Star 940W 1408W 1878W
4 Star 782W 1174W 1565W

EER Rating of Air Conditioners

EER rating is an abbreviation for energy efficiency ratio that is used to measure the room air conditioner’s efficiency.

EER is the ratio of the cooling capacity (in British thermal units (Btu) per hour) to the power input (in watts).

The higher the EER rating of an air conditioner is, the more efficient the air conditioner will be.

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