The number of cups of kernels from 6 ears of corn depends on the size of the ears, but on average:
1 medium ear of corn yields about ¾ to 1 cup of kernels.
So, for 6 ears of corn:
6 × ¾ = 4.5 cups (on the lower end).
6 × 1 = 6 cups (on the higher end).
On average, you can expect about 4.5 to 6 cups of corn kernels from 6 ears of corn.