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Filament Density Converter

Convert between filament length (meters) and weight (grams) for any material density. Essential for checking if you have enough spool left.

Conversion Settings

Material

Result

Calculated Weight
298.25 g
Use this to check if that leftover spool has enough filament for your print (usually sliced in grams or meters).

Why does this matter?

Knowing exactly how much filament you have left is the difference between a successful 20-hour print and running out of plastic at 95%.

Slicers often give you estimates in grams (weight) or meters (length). However, what you can measure physically is often the opposite of what the slicer tells you:

  • The Slicer says: "This print needs 14 meters of filament."
  • You have: A partial spool that weighs 250g (minus the empty spool weight).
This calculator bridges that gap using the material's density.

Common Densities Cheat Sheet

MaterialDensity (g/cm³)Characteristics
PLA1.24Standard, heavy
PETG1.27Heavier than PLA
ABS/ASA1.04 - 1.07Lightweight
TPU (95A)1.21Flexible
Nylon (PA6)1.14Tough, moisture-sensitive
Polycarbonate1.20Strong, heat resistant
PVB1.08Smoothable with IPA
HIPS1.05Soluble support material
PP (Polypropylene)0.90Very light (floats on water)

* Values are averages. Different brands and blends (e.g., PLA+) may vary slightly.

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