How many liters of water does it take to produce 1 kg of beef on a global average, counting all water used to grow the animal's feed?

Answer

15,400 liters

That's enough water for about 100 full bathtubs per kilogram of beef — over 90% of it goes into growing the grain and grass the cattle eat.

Source: Water Footprint Network (Mekonnen & Hoekstra, 2012)