Repost: This topic was publish at Architecture Admirers.
Detailed information for the tools for measuring. Maybe you will be skeptic at first and think what is more to be specific for these tools. But, in fact there are many tricks that can help you. For example, if you need fractions, they are not written on the tool itself. On the picture below there are the examples of the chunks and the fractions.
So, you only need to take few minutes and observe the pictures below. Then everything will be easier and you are not going to need special measurement tools and calculations.
Source: Here