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Free Cooling Airflow Calculator — Tons to CFM
Calculate the required airflow (CFM) for an air conditioning system based on cooling capacity in tons and the standard CFM per ton rating. The industry standard is typically 400 CFM per ton, but this varies by system design and climate.
Frequently asked questions
How many CFM per ton of cooling?
The standard rule of thumb is 400 CFM per ton of cooling capacity. A 3-ton AC system typically requires 1,200 CFM of airflow.
How do I convert AC tons to BTU?
1 ton of cooling = 12,000 BTU/h. A 3-ton system = 36,000 BTU/h.
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