How Many Square Feet Does a 3 Ton Air Conditioner Cool?


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It’s good to estimate the cooling per tonnage of an AC before finalizing the purchase. If you invest in the wrong outlet, it will cause trouble until it lasts. You can easily calculate a 3-ton air conditioner’s cooling capacity if you have a little knowledge of BTU and tonnage. These terminologies are suitable to learn to purchase a perfect AC for you. Let’s find out how many square feet does a 3 ton air conditioner cool.

When you’re at the market, you’ll encounter many brands and models ranging from 1 ton to several. But if you have a little knowledge about how to choose the right piece, it’s not an issue for you to finalize the one for you. Here is how to do this. 

How Many Square Feet Does a 3 Ton Air Conditioner Cool?

How Many Square Feet Does a 3 Ton Air Conditioner Cool

The British Thermal Unit (BTU) is the power that your AC will consume to push heat from your room per square foot. On the other hand, tonnage is the capacity of an air conditioner. Both these terms are interlinked. Having a little knowledge of both these terminologies, you can easily invest in a good air conditioner for you. Here is how to take out the BTU. 

BTU = Length of the room (ft.) × Width (ft.)/25

When you succeed in taking out the right BTU required to cool your room, you can also use it to calculate the tonnage of the required air conditioner. According to the research, 1 ton equals 12000 BTU per hour. It means that you’ll need about 0.0016 tons to cool per square foot.

From this perspective, a 3 ton AC will be enough for 1800 square feet. If the area of your room is equal to or slightly less than this measurement, a three-ton AC will be sufficient for it. 

What to Consider While Choosing the Right Tonnage? 

How Many Square Feet Does a 3 Ton Air Conditioner Cool

When you go to the market for an air conditioner, consider the following variables. It will help you choose the right one for you. 

Learn More: How Many Amps Does A 2 Ton Air Conditioner Use

What you’re going to cool? 

When you are looking for an air conditioner, confirm what kind of space you’re going to cool with it. If you’re going to cool an open hall, it will need a heavy-duty AC, while your small room will need low tonnage. 

The climate of the Region

Some regions are too hot, while some are moderate. If you belong to a very hot area, you’ll have to choose the one with high power. 

  • Height of your ceiling out of total height
  • Material and insulation of the room
  • Lighting type as it affects the temperature
  • Nature of windows and doors


Different sizes of air conditioners are good for different areas. However, it’s good to confirm which size suits you. If you mistakenly choose the wrong size, it will be useless as it will not cool your room appropriately. Tonnage and BTU are interlinked, so make sure you choose the right BTU for your room.

When BTU is identical to the room size, tonnage will be equal. However, it’s good to know the exact cooling capacity of the AC you’re going to invest in.

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