Two-way spool conversion
Convert filament weight and length
Estimate how many metres are in a known filament weight, or how many grams a known length weighs. Choose a reference material and edit its density when your manufacturer provides a value.
Conversion estimate
1,000 g ≈ 335.3 m
Weight from entered length100 m ≈ 298.3 g
FormulaMass ÷ density ÷ cross-section
PLA and PETG densities are editable reference examples from Prusament technical data, not universal values. Pigments, fillers, foaming, diameter tolerance, and manufacturer formulation change the result. Use the exact datasheet value when available and weigh the spool for inventory decisions.
Prusament PLA density reference · Prusament PETG density reference