Energy Saving
How to Calculate the Right AC Tonnage for Your Room Size
Eng. Ahmed Al-Harbi2026-04-205 min read
A simple mathematical formula to calculate the correct AC cooling capacity in tons for your room size to optimize comfort.
The Pitfalls of Wrong AC Sizing
An undersized AC will run continuously, wasting energy without cooling the room. An oversized AC will cycle off too quickly, leaving the room humid. Calculate the exact tonnage needed for your Saudi home.
Tonnage Calculation Formula
The standard formula used in Saudi Arabia is:
(Length × Width × Height) × 300 / 12,000 = Required Tonnage.
(Note: 300 is the heat load factor for hot desert climates like Riyadh, while 12,000 converts BTUs to Tons).
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