To use the calculator: Run the program, roll the wheel over the box you want to measure and press enter. Repeat for the width and heighth. The device should display the volume in gallons. If it doesn't seem to be working, or you aren't sure of a step, feel free to contact me, and I'll be happy to help. Again, if you like this please vote.
This project was inspired by the how-to from nxtprograms.com
. Check out their site for lots of cool Mindstorms projects.