How do you convert filament weight to length?
We use the material density and filament diameter to compute volume, then length. For example, 1 kg of 1.75 mm PLA is about 330–335 meters.
Filament Weight & Length Converter
Convert filament weight to length (or length to weight) for any material and diameter. Handy for checking how much is left on a partial spool or how far a model's gram estimate will stretch. 1 kg of 1.75 mm PLA is roughly 330 meters.
FAQ
Why does diameter matter?
2.85 mm filament has a larger cross-section than 1.75 mm, so the same weight is a shorter length. The converter accounts for this automatically.
Where do the densities come from?
Standard nominal densities per material (PLA ~1.24 g/cm³, PETG ~1.27, ABS ~1.04). Actual values vary slightly by brand and any fill additives.
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