Buying an air conditioner is an important purchase, and it is worth your time to make sure you do it right.
However, since there are many additional factors that influence the precise number of BTUs necessary to effectively and efficiently cool your specific area, we highly recommend that you speak with an expert to ensure the most accurate measurements.
The AC Sizing chart below can help you get a general idea when sizing an air conditioner for an individual room. First, find the square footage of your room and then check its corresponding BTU requirements.
This chart is only a starting point, though, and you should not base your purchase decision on this information alone. For a more precise estimate, you can use our HVAC sizing calculator. The most accurate method of sizing is with a professional ACCA Manual J Calculation, and we highly recommend this before making any HVAC purchase.
Please contact our experts with any other questions. Happy sizing!
If you're just looking for a rough estimate to guide your air conditioner search, you may reference the table provided by Energy Star below:
Area To Be Cooled | Capacity Needed |
| 100 up to 150 | 5,000 |
| 150 up to 250 | 6,000 |
| 250 up to 300 | 7,000 |
| 300 up to 350 | 8,000 |
| 350 up to 400 | 9,000 |
| 400 up to 450 | 10,000 |
| 450 up to 550 | 12,000 |
| 550 up to 700 | 14,000 |
| 700 up to 1,000 | 18,000 |
| 1,000 up to 1,200 | 21,000 |
| 1,200 up to 1,400 | 23,000 |
| 1,400 up to 1,500 | 24,000 |
| 1,500 up to 2,000 | 30,000 |
| 2,000 up to 2,500 | 34,000 |