What size generator do I need to run 2 ton ac unit?

What size generator do I need to run 2 ton ac unit?
                                                                    Generator

    1    0.75 Ton =9000 British thermal unit (BTU)=4.5Amps only 3kw or 3.5 kva Generator

    2     1 Ton = 12000 British thermal unit (BTU) = 6 Amps only 3.5 kw or 4kva Generator

   3     1.5 Ton = 18000 British thermal unit (BTU) = 9 Amps only 5kw or 6kw or 6.5 kva Generator

   4     2 Ton =24000 British thermal unit (BTU) = 12 Amps only 8kw or10 kva Generator

   5    2.5 Ton = 30,000 British thermal unit (BTU) = 15 Amps only12kw or 15kva Generator

   6    3 Ton = 36,000 British thermal unit (BTU) = 18 Amps only 15 kw or  17 kva Generator