BTU Calculator
Find out exactly which aircond size you need for your room. Adjusted for Malaysia's tropical climate — results are specific to local conditions, not generic overseas formulas.
Room area: 16.0 m²
Understanding the Results
1 HP
~9,000 BTU
Up to 20 m²
Small bedrooms, studies
1.5 HP
~12,000 BTU
20–30 m²
Standard bedrooms, small living rooms
2 HP
~18,000 BTU
30–45 m²
Master bedrooms, medium living rooms
2.5 HP
~24,000 BTU
45–60 m²
Large living rooms, open spaces
3.5 HP
~36,000 BTU
60–80 m²
Very large spaces, commercial use
Multiple Units
80+ m²
Above 80 m²
Consider ceiling cassette or multiple wall units
Frequently Asked Questions
What is BTU and why does it matter for aircond selection?
BTU (British Thermal Unit) measures cooling capacity. Too low = room won't cool down. Too high = unit short-cycles, wastes energy, and doesn't dehumidify properly. Getting the right BTU is essential for comfort and efficiency.
Why does Malaysia need higher BTU than temperate countries?
Malaysia's tropical climate (consistently 28–35°C, high humidity) puts more load on air conditioning. Our calculator applies a 25% tropical adjustment to standard BTU formulas, giving you a more accurate estimate for Malaysian conditions.
What is the difference between BTU and HP rating?
HP (horsepower) is commonly used in Malaysia to describe AC size. 1 HP ≈ 9,000 BTU, 1.5 HP ≈ 12,000 BTU, 2 HP ≈ 18,000 BTU. When shopping for a unit, the HP rating on the box corresponds directly to BTU capacity.
Does room orientation affect BTU requirements?
Yes. West-facing or south-facing rooms receive more direct afternoon sun and need higher cooling capacity. North-facing or shaded rooms need less. Our calculator accounts for this with the sun exposure input.