Right now, my flock of 15 pullets/hens and 1 cockerel go through 40 pounds of all flock pellets, in about 10 -11 days .... That equals approx. 1/4 pound per bird, per day, or +- 4 pounds per day. This is in addition to 5 - 6 hours of free range daily. Food is left in the coop at all times.
It is winter now, and pickens are slim ..... Spring/summer ratios will be different, I'm sure.
I'm not sure how many cups of food that is as I use a large coffee can, filled twice, every day.
There is some being scratched out of the feeder, but the waste is minimal as they usually clean up their mess fairly well.