Spool Remaining Lab
3D printing / Practical workbench

Worked examples

Three reproducible scenarios, with the complete inputs and calculated outputs.

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Worked scenario

Base example

Loaded spool mass is 620 g. All other inputs remain at the base values.

InputValueUnit
Loaded spool mass620g
Empty spool mass210g
Filament diameter1.75mm
Material density1.24g/cm3
Slicer filament estimate120g

Calculated results

ResultValueUnit
Filament remaining410g
Estimated remaining length137.4663m
Whole jobs before reserve3jobs

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Worked scenario

Smaller first input

Loaded spool mass is 496 g. All other inputs remain at the base values.

InputValueUnit
Loaded spool mass496g
Empty spool mass210g
Filament diameter1.75mm
Material density1.24g/cm3
Slicer filament estimate120g

Calculated results

ResultValueUnit
Filament remaining286g
Estimated remaining length95.8911m
Whole jobs before reserve2jobs

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Worked scenario

Larger first input

Loaded spool mass is 744 g. All other inputs remain at the base values.

InputValueUnit
Loaded spool mass744g
Empty spool mass210g
Filament diameter1.75mm
Material density1.24g/cm3
Slicer filament estimate120g

Calculated results

ResultValueUnit
Filament remaining534g
Estimated remaining length179.0415m
Whole jobs before reserve4jobs

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Weigh an identical empty spool when available and keep a reserve rather than scheduling a print to consume the final gram.