Free Tool
AC BTU Calculator
Find the right aircon size for your room. Calibrated for Singapore's tropical climate with accurate HP recommendations.
Frequently Asked Questions
How many BTU do I need for a Singapore HDB bedroom?
A typical Singapore HDB bedroom (10–12 m²) needs approximately 9,000–12,000 BTU (1–1.5 HP). The calculator accounts for tropical climate conditions which require about 25% more cooling capacity than temperate climates.
What does HP mean for aircon units in Singapore?
1 HP (horsepower) is approximately equal to 9,000–10,000 BTU. Common sizes in Singapore are 1 HP, 1.5 HP, and 2 HP. The BTU calculator will recommend the appropriate HP for your room.
Does a west-facing room need a bigger aircon?
Yes. West-facing rooms in Singapore receive intense afternoon sun and can be significantly warmer. Our calculator adds a 10% increase for full sun/west-facing rooms.
Should I get a bigger aircon just to be safe?
Not necessarily. An oversized aircon cools the room too quickly without removing enough humidity, leaving the air feeling clammy. Use this calculator to find the right size for your specific room.