What size air conditioner for 3200 sq ft?

Typically, you want to size your A/C at 12,000 btu's or 1 ton of cooling per 1,000 sq ft ,so at 3200 sq ft you would need a 3 ton or a 36,000 btu system. how ever if you live in a high humidity area than you adjust upward to 3.5 ton or a 42,000 btu . hope this helps good luck.