Kegging Volume?

[Hinodriver]

Is there anyway to know how much beer is still in my corny keg? I though of floating a magnet in a small jar and then putting a dime on the outside of the keg? Thoughts? Anyone have better ideas?

 

[myndflyte]

This is essentially what you are describing:

https://www.hoptech.com/products/ball-and-keg-level-indicator-corny-kegs

 

[GolFisHunt]

Weigh an empty keg, weigh one with beer. The difference in pounds divided by FG equals the number of pints left.

 

[stz]

Yeah weight. Or look at the line of condensation if they are cold.