Air Conditioner Size Calculator
Estimate cooling capacity and recommended class from floor area
Cooling Space
Recommended class
~0 pyeong
Details
⚠️ This calculator is a simple reference tool based on standard engineering formulas. Actual required quantities may differ due to site conditions, material types, construction tolerances, specifications, and changes in applicable regulations. calcstool.com assumes no legal liability for any procurement, design, construction, or other decisions made in reliance on these results, nor for any direct or indirect damages arising therefrom.
FAQ
How is air conditioner size calculated?
Multiply the cooling floor area (in pyeong) by about 450 W per pyeong for homes (580 W for commercial) to get required capacity (W), then divide by 400 W for the product "class". One pyeong is about 3.3058 ㎡.
How do W and BTU relate?
1 W is about 3.412 BTU/h. So 4,500 W is roughly 15,400 BTU/h.
What about a living-room stand unit?
Living rooms often open to the kitchen, so size for about 1.3× the actual area; for large windows, west-facing or top-floor rooms, go one or two classes higher. The adjustment option adds +20%.
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