Question: how many tons in ac unit?
Answer: The possibilities on residential units range from 18 to 60. Divide the number by 12 (which represents 12,000 Btu/hr, or one ton of cooling capacity) to get your AC unit's tonnage. If you don't want to do the math, here are the numbers you're looking for and their corresponding tonnage: 18 = 1.5 tons.