Figure out line weight?

[mute]

Is there anyway to figure out what line weight a line is if you never knew?

 

[bam]

You could weigh the line, figure out how long it is and compare the grains per inch of your line to a chart. Aside from that, load it up on a rod and do it by feel

 

[albatross]

Weigh the first 30 feet and refer to this table:

http://www.sexyloops.com/beginners/lesson2/aftm.shtml