Re: How do I measure how much liquid is in a potato?

Well, you would need some fancy lab equipment to be very precise. Of course 
I am assuming that you don't have high-end equipment so I will tell you the 
easy, close enough way. 

First, weigh your potato. Then cut some lines in to the potato. Afterwards cook 
your potato at about two hundred degrees depending on weather it is a big potato 
or not you might want to adjust the temperature some. Let it cook for a couple 
of hours and then reway it after it cools. Subtract that weight from the potatos 
original weight and what ever you get is about what the liquid in that potato 
weighed. 

Basically you are just over cooking a potato. I am sure you have seen them like 
that before. when the potato is overcooked all or most of the liquid evaporates 
from it. Just remember that every potato is different and that the weight of the 
liquid in them is going to be different for every potato.