You sometimes want to know how much string is left on your reel? Here is a table with which you can calculate it: Just enter the weight of the reel in grams in the green column. Normal link to the spreadsheet. If you have other values of empty and full reels of other brands and types, just add them at the bottom. If any values are wrong, you can also leave a comment.
I just take a sharpie and make a tick mark on the outside reel casing every time I need to use it to string up a racket.
I love so much the idea and its simplicity that I wrote a simple html form to use it online (stringer-tool.surge.sh). Icing on the cake: with iOS you can add a bookmark on your home screen and its acts as an app. Thank you Alex82! Does anyone have a LN1 reel to weight?
FYI: Weighed a 220m reel of Gosen G-Tone 5 Full: 131.1g Empty: ? 200m reel Gosen G-Tone 5 Full: ? Empty: 44.2g