Cost & Business MODULE

Filament Weight ↔ Length Converter

Convert between filament weight in grams and length in meters for 1.75mm and 2.85mm across PLA, PETG, ABS, TPU, and custom densities.

Conversion Mode

Filament Weight (g)

grams

Filament Diameter

Material Type1.24 g/cm³

RESULTS & BREAKDOWNV=πr²L

Filament Length (m)

335.3meters

≈ 1100.0 feet (0.335 km)

Weight:1000.00 g (1.000 kg)

Linear Mass:2.98 g/meter

Total Volume:806.45 cm³

Cross-Section Area:2.405 mm²

Quick Rule of Thumb

Standard 1.75mm PLA yields approximately 330–335 meters per 1 kg spool. PETG yields ~327m, and ABS yields ~400m due to lower density.

01 / PROTOCOL

Measurement & Operating Instructions

STEP 01

1. Choose Diameter

Select 1.75 mm (standard) or 2.85 mm / 3.0 mm (UltiMaker).

STEP 02

2. Pick Material

Select your filament type (PLA, PETG, ABS, TPU, ASA, Nylon) to load verified density.

STEP 03

3. Enter Weight or Length

Type weight in grams to calculate meters, or meters to calculate required grams.

02 / MATHEMATICS

Filament Geometry & Cylinder Volume

Converting filament weight into length relies on the mathematical cylinder volume equation multiplied by raw material polymer density.

Length (m) = Weight (g) / [Density (g/cm³) × π × (Diameter/2)² / 1000]

Real-World Worked Benchmark:

For 1 kg (1000g) of standard 1.75mm PLA (density 1.24 g/cm³): Radius = 0.0875 cm. Cross section = 0.02405 cm². Volume = 1000 / 1.24 = 806.45 cm³. Length = 806.45 / 0.02405 = 33,532 cm = 335.3 meters.

Frequently Asked Questions

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

A standard 1 kg spool of 1.75mm PLA filament contains approximately 335 meters (1,100 feet) of printable filament. For PETG (density 1.27 g/cm³), 1 kg yields about 327 meters.

Why does filament density differ between brands?

Fillers, color pigments, and additives alter density. For instance, carbon-fiber infused PLA is slightly denser (~1.27 g/cm³), while lightweight foaming PLA (LW-PLA) can drop as low as 0.65 g/cm³.

How much does 1 meter of 1.75mm PLA filament weigh?

One meter of 1.75mm standard PLA filament weighs approximately 2.98 grams (1000g / 335.3m ≈ 2.98g/m).

How many meters are in a 1kg spool of 2.85mm filament?

Because 2.85mm filament has more than 2.6 times the cross-sectional area of 1.75mm (6.38 mm² vs 2.41 mm²), a 1kg spool of 2.85mm PLA yields only ~126 meters.

How do I calculate the weight of filament needed from slicer volume?

Multiply the cubic centimeters (cm³) reported by your slicer by polymer density. For example, a 50 cm³ model printed in PETG (1.27 g/cm³) weighs 50 × 1.27 = 63.5 grams.

CALCULATOR SUITE