AC BTU Calculator
Calculate the right AC size for your room. Free BTU calculator for air conditioners. Find out what size AC unit you need....
Recommended AC Size
8,000 BTU
0.67 Tons
Room Size
180 sq ft
Floor area
Volume
1,440 cu ft
Air volume
Base BTU
6,000
Before adjustments
Est. Cost
$250-450
Window unit
⚡ BTU Adjustments Applied
Base BTU (by sq ft)
6,000
Sun Exposure
+0%
Climate Zone
+0%
Room Type
+0%
Ceiling Height
+0%
❄️ AC Size Guide
| Room Size | BTU Needed | Tons |
|---|---|---|
| 150-250 sq ft | 6,000 | 0.5 |
| 250-300 sq ft | 7,000 | 0.58 |
| 300-350 sq ft | 8,000 | 0.67 |
| 350-400 sq ft | 9,000 | 0.75 |
| 400-450 sq ft | 10,000 | 0.83 |
| 450-550 sq ft | 12,000 | 1.0 |
| 550-700 sq ft | 14,000 | 1.17 |
| 700-1000 sq ft | 18,000 | 1.5 |
| 1000-1200 sq ft | 21,000 | 1.75 |
| 1200-1500 sq ft | 24,000 | 2.0 |
About This Tool
Calculate the right AC size for your room. Free BTU calculator for air conditioners. Find out what size AC unit you need.
This free online calculator provides instant, accurate results. No signup required - just enter your values and get your answer immediately.