here in australia they recommend 600ml of calcium, we do 500mls of milk a day, plus milk in cereal if we do it that day, with cheese and yogurt as well, i feel this is the right amount, when i went from bf to cows milk, we only did 250mls of milk a day at first, she just would not drink milk after some time i just started adding 250mls in the afternoon as a snack and we have done that ever since, i must admit that we do not do milk with food, i do milk 30-60 minutes after breakfast and lunch 30 minutes before nap and milk 30/60 minutes after nap, it funny that you should ask this question today as i gave her approx. 50mls straight after lunch, i am also clueless and only did what worked for us, i would love to here what others do