3D Filament Calculator: Weight to Length (Grams to Meters)

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1. Datos de Material y Bobina

Filament Material (Thermoplastic)

Filament Diameter

Current Scale Reading (Spool + Remaining Filament)

Weigh the spool on a kitchen scale

Empty Spool Tare Weight (Plastic/Cardboard Spool)

New spool total capacity

Will it be enough for your next print?

Filament required by slicer (g)

Reported in your slicer preview (Cura, Bambu Studio, OrcaSlicer, PrusaSlicer)

Length in Meters

0.0 m

Net Usable Filament: 0 g

Remaining Percentage 0%

Density

1.24 g/cm³

Cross Section

2.41 mm²

How to Calculate Filament Weight and Length in 3D Printing

Every 3D maker has faced the dilemma of starting a large print with an open spool, fearing it will run out mid-job. Since 3D slicing software reports filament usage in both meters and grams, knowing how to convert between the two using the exact plastic density allows you to weigh your spool on a kitchen scale and verify in seconds if you have enough material.

Densities Table for Common 3D Printing Filaments

PLA: 1.24 g/cm³ (~335 metros por cada 1 kg de 1.75 mm)
PLA-CF (Fibra de Carbono): 1.29 g/cm³ (~322 metros por kg)
PETG: 1.27 g/cm³ (~327 metros por kg)
ABS: 1.04 g/cm³ (~400 metros por kg)
ASA: 1.07 g/cm³ (~388 metros por kg)
TPU 95A: 1.21 g/cm³ (~343 metros por kg)
Nylon (Poliamida PA): 1.14 g/cm³ (~364 metros por kg)
Policarbonato (PC): 1.20 g/cm³ (~346 metros por kg)

Frequently Asked Questions about Filament Length

How many meters of filament are in a 1 kg spool of PLA?

A standard 1 kg (1,000 g) spool of 1.75 mm PLA filament has approximately 330 to 335 meters of usable filament, assuming a polymer density of 1.24 g/cm³.

Why does 1 kg of ABS have more meters than 1 kg of PLA?

ABS has a lower density (1.04 g/cm³) than PLA (1.24 g/cm³). Because ABS is lighter per unit volume, a 1 kg spool of 1.75 mm ABS yields approximately 400 meters—nearly 20% more length than an identical weight of PLA.

What is the empty tare weight of a typical 3D printer spool?

Empty spools typically weigh between 150 and 250 grams. Standard injection-molded plastic spools weigh around 200g-220g, Bambu Lab reusable spools weigh approximately 240g, and eco-friendly cardboard spools weigh around 140g-160g.

How can I calculate if my remaining filament is enough for a G-code print?

Place your opened spool on a kitchen scale and subtract the empty spool tare weight (usually ~220g) to obtain net filament weight. Compare this figure with the filament weight reported by your slicer (Bambu Studio, Cura, OrcaSlicer) in the slice preview.

3D Filament Calculator: Grams to Meters

How to Calculate Filament Weight and Length in 3D Printing

Densities Table for Common 3D Printing Filaments

Frequently Asked Questions about Filament Length

How many meters of filament are in a 1 kg spool of PLA?

Why does 1 kg of ABS have more meters than 1 kg of PLA?

What is the empty tare weight of a typical 3D printer spool?

How can I calculate if my remaining filament is enough for a G-code print?

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