What is the tonage for the goodman air conditioner modal number ckl49-1a?

That is a 4 ton unit. Air conditioning is measured in BTU's of refrigerant. 12,000 btu's per ton. The 49 in the model number indicates 49,000 btu's of refrigerant. When you devide 49 by 12 you get a fraction over 4 tons. But A/c systems are rounded off and not measured fractionally, so you get 4 tons.