You can not equate units of volume and weight directly.
500 millimeters
That is 18.144 litres
7.3 lb per US gallon (0.9 kg / liter). 18000/.9= Liters
1
10 Liters
119.241 liters in one US barrel.
There are 1,000 liters in one kiloliter.
One kiloliter per 1,000 liters.
There are approximately 3.785 liters in one gallon.
363 liters
There are 120 liters in 120 kg of lime. The conversion of liters to kilogram is one is to one.
2 liters of water is what a 190 person should drink per day. They could drink more or less if they desired but 2 liters is a good average.