Filament Calculator
Convert filament length to weight and back online for free — meters ↔ grams by material density and diameter, plus a spool-remaining calculator.
Diameter
Material
40.3Volume (cm³)
2.98Grams per meter
335.3Meters per kg
338.6 m1010 g of filament left
About Filament Calculator
Convert between filament length and weight in either direction: enter grams to get meters or meters to get grams, for 1.75 mm and 2.85 mm diameters across PLA, PETG, ABS, ASA, TPU, PC and PA — or type a custom density.
The spool-remaining section tells you how much filament is left: weigh the whole spool, subtract the tare weight of the empty spool, and read the remaining grams and meters. Everything runs locally in your browser.