About AC BTU Calculator
Determine the required air conditioner BTU cooling capacity and tonnage for your room size.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Base BTU = Room Area (sq ft) × 20 BTU + Climate / Sunlight Adjustments
Example Calculation
A 250 sq ft master bedroom with standard sun requires ~6,000 to 7,000 BTU cooling.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.