Remaining Filament Measuring Tool
thingiverse
I got fed up with constantly wondering whether I had sufficient filament remaining on my spool to bring my next project to life. So, I developed this handy tool to accurately measure the remaining filament on the spool. You may need to adjust it for various spool sizes - and, honestly, I'm not entirely sure if they vary significantly. The tool is calibrated in layers of filament, and you can use that measurement with the included spreadsheet to calculate exactly how much filament you have left.
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