Air Conditioner BTU Table: Cooling capacity needed by Room area
Reference table of cooling capacity needed for Air Conditioner BTU across a range of room area values — exact, engine-computed figures you can read off at a glance.
Air Conditioner BTU Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Cooling capacity needed
4,000
- In tons
- 0.33
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Air Conditioner BTU Calculator
The Air Conditioner BTU Calculator works out your cooling capacity needed, along with 1 related figure in an instant. Enter room area and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the room area.
- Read off your cooling capacity needed, together with in tons — the calculator updates automatically, with no button to press.
Formula
The Air Conditioner BTU Calculator uses the formula:
Cooling capacity needed = Room area × 20
Worked example
For example, with room area of 200 sq ft, the cooling capacity needed is 4,000.
| Room area | 200 sq ft |
|---|
| Cooling capacity needed | 4,000 |
|---|---|
| In tons | 0.33 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Area
- The amount of two-dimensional space a shape covers, measured in square units.
Frequently asked questions
A common rule is about 20 BTU per square foot. A 200 sq ft room needs roughly 4,000 BTU, or about 0.33 tons of cooling.
One ton of air-conditioning equals 12,000 BTU per hour. The calculator converts the BTU figure into tons for you.
Yes. Sunlight, ceiling height, number of occupants, kitchens and climate all raise the requirement. Add capacity for hot, sunny or crowded rooms.
No. An oversized unit cools too fast and cycles on and off, leaving the room humid and wasting energy. Right-sizing is best.
The Air Conditioner BTU Calculator uses the formula: Cooling capacity needed = Room area × 20. For example, with room area of 200 sq ft, the cooling capacity needed is 4,000.
Enter the room area. Read off your cooling capacity needed, together with in tons — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Air Conditioner BTU: Formula, Steps & Examples
Learn how to calculate Air Conditioner BTU — the formula explained step by step, with worked examples and a free calculator to check your answer.