cylinder volume tool

Gday

I use a ruler to determine how much water I have in my kettle and currently use a webpage to convert the required water addition determined by beer smith to the centimeters of water in need in my kettle.

It would be great if there was a tool that you could do this with in the program. Even better would be that it already knew the dimensions of you equipment and just had another text box on the mash page for this information..

here is a link to the current web page tool that I currently use

http://aqua.ucdavis.edu/Calculations/Volume_of_a_Cylindrical_Tank.htm

thanks

Mass