Filament Density Converter

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

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Conversion Settings

Conversion Mode

Input Value (meters)

Material

Preset

Density (g/cm³)

Diameter (mm)

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

Material	Density (g/cm³)	Characteristics
PLA	1.24	Standard, heavy
PETG	1.27	Heavier than PLA
ABS/ASA	1.04 - 1.07	Lightweight
TPU (95A)	1.21	Flexible
Nylon (PA6)	1.14	Tough, moisture-sensitive
Polycarbonate	1.20	Strong, heat resistant
PVB	1.08	Smoothable with IPA
HIPS	1.05	Soluble support material
PP (Polypropylene)	0.90	Very light (floats on water)

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

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