Free tool
Filament calculator
How many grams is that 18 m of PETG? How much is left on a half-used spool? Pick a material and diameter — the math is instant.
Weight → length
g
Length—
Length → weight
m
Weight—
How much is left on this spool?
g
g
Remaining—
≈ Length left—
Tip: most 1 kg spools list a net filament weight — weigh an empty spool once and subtract it for accuracy. Gyroid tracks all of this per spool. Get the app.