Best AC Size for 18x18 Room

324 sq ft — Recommended: 0.75 Ton (8,700 BTU)

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AC Recommendation for 18x18 Room

Room Size

324 sq ft

Recommended

0.75 Ton

BTU Required

8,700

Window AC or small split AC

Factors to Consider:

  • Add 10% for kitchens or rooms with lots of electronics
  • Add 15% for rooms with high ceilings (above 10 feet)
  • Add 10% for west-facing windows with direct sunlight
  • Consider inverter AC for 25-40% energy savings

Room Details

Enter your room specifications

ft
ft
ft

Additional Factors

Recommended AC Size

Based on your room specifications

Frequently Asked Questions

What AC size do I need for a 18x18 room?▼

For a 18x18 room (324 sq ft), we recommend a 0.75 Ton AC with 8,700 BTU capacity.

How many BTU for a 324 sq ft room?▼

A 324 sq ft room typically needs 8,700 BTU of cooling capacity. This is equivalent to 0.75 Ton of cooling.

Can I use a smaller AC for my 18x18 room?▼

While a smaller AC might cool the room eventually, it will run constantly, use more electricity, and may not adequately dehumidify.