36 oz flour is how many cups?

6 oz of flour = 3/4 cup of flour, if you are measuring by volume.

Edit: Actually, there are only about 4.5 oz of flour in a cup. Therefore, 6 oz of flour is 1 + 1/3 cup. There are 8 fluidounces in a cup, so unless you are measuring a liquid, 3/4 cup is not correct.