Here is a link to my article about weighing swords.

The main goal of this article is to provide a practical way to measure the mass distribution of swords, or at least the aspects of it that have a significant effect on handling properties. These meaningful measurements should ease the comparisons between weapons when hands-on examination is impractical. The typical situations for use of such characteristics could range from on-line reviews and purchase of reproductions or martial training tools, to the study of museum pieces.

Full article in PDF format

Companion video showing the ‘waggle test’:

You are also welcome to discuss the article in one of these threads: