Remaining Spool Filament Calculator

I love Deemoss's remaining filament calculator when planning my prints, but I wanted to take it a step further and get a more accurate estimate of my remaining filament to plan how many items to include in my print to minimize filament waste. I added several measurement methods, as well as a settable packing efficiency factor:
https://jscalc.io/calc/OllyxsdnTMnE6TWx

If you have an empty spool from the same vendor & a nice scale, you can opt to measure the length by weight as well:
https://j