AC BTU Calculator
Your space
Adjust the details below — the result updates instantly.
Room area25m²
Ceiling height2.7m
Sun exposureDirect sunlight the room receives
Insulation & windowsWall and window thermal quality
People (regular)How many people are usually in the room
2
Heat-producing appliancesTV, computer, fridge and similar
1
Required cooling capacity
8,100BTU/h
≈ 2.4 kW cooling power
Recommended AC unit
9,000 BTU class
Rounded up to the nearest standard unit — sizing down risks a unit that never keeps up.
This is a quick estimate for typical rooms, not a full engineering (Manual J) load calculation. For an exact specification, contact our engineers.
Why correct sizing matters
Too small
An undersized unit runs non-stop, never reaches the set temperature, wears out faster and drives up your electricity bill.
Too large
An oversized unit cools quickly then shuts off in short cycles — so it never removes humidity properly, leaving the air cold but clammy, and costs more up front.