I made a tool for Minecraft that I though many people would like. Some people might think that it is useless, but I am sure others will find it helpful. I have worked on it a lot in the last few months, now I am at version 2.4, this version includes:
-Automatic roof and floor calculator
-Measurements include blocks, stacks, chests and large chests
To download it you go to the spreadsheet page at Google Sheets (https://goo.gl/d5r4y5), then click File > Download As Then choose what kind of file you want to download the spreadsheet as. This includes Microsoft Excel (.xlsx), and Open Document (.ods).
I am working on a web-based version at the moment, so you will be able to access it on my website directly without needing to download anything.
I might make a mod for it as well, but I need someone to help me with that.