But, I am not always connected to the Internet, so when I need this
information the most, I don't have access to it!
The solution? I wrote a C++ based Windows application, based on
the Javascript one listed in the above link. This allows me to calculate the
correct Depth of Field (DOF) and Hyperfocal distance in the field,
on my laptop computer.
For a great description of why you would use this calculator, go here: