About how many gallons of milk can a cow produce?

Question

Talking about holstein cows

Answer 1

In a typical 305-day lactation, a Holstein could produce 6685 kg milk.  That's about 21.9 kg/day, or 9.9#/day, or 2.4 gallons/day.

Answer 2

The top producing cow gave 11ish gallons of milk every milking (she had two milkings a day). A gallon of milk weights 8.6lbs (a gallon of water weights 8 milk weights more because it has more stuff in it).

This site has the top producing Holstein-Frisian cows:

http://www.holsteinusa.com/html/world_re...