PETG density typically ranges from 1.23 to 1.27 g/cm3 (1230 to 1270 kg/m3). Enter a value to convert between g/cm3 and kg/m3. This is used when entering material properties into a slicer or checking filament length from spool weight.
Last updated: May 2026
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How to Convert g/cm³ to kg/m³
Multiply g/cm3 by 1000 to get kg/m3, so a PETG sheet listed at 1.27 g/cm3 on a datasheet becomes 1270 kg/m3 in a slicer that asks for SI units. PETG sits in a fairly tight band: most plain spools land near 1.27 g/cm3, transparent and glass-clear grades dip to about 1.23 g/cm3 because they drop the white or color pigment, and carbon-filled PETG-CF stays close to 1.27 g/cm3 since the chopped fiber and the PETG matrix have similar densities. Because PETG is heavier than ABS (around 1.04 g/cm3), the same 1 kg spool gives you noticeably fewer meters of PETG to print with.
Example: a 1.27 g/cm³ PETG datasheet value × 1000 = 1270 kg/m³ for the slicer.
Density by PETG type
The table below lists the density most commonly seen for each PETG variant and how far a 1 kg spool of 1.75 mm filament stretches at that density. The "meters per 1 kg spool" figure assumes the nominal 1.75 mm diameter; real spools wind 1 to 3 percent short because the strand is rarely exactly on size.
PETG type
Density (g/cm³)
Density (kg/m³)
Meters per 1 kg spool (1.75 mm)
Standard PETG
1.27
1270
~327 m
Transparent / clear PETG
1.23
1230
~338 m
PETG-CF (carbon fill)
~1.27
~1270
~327 m
Brand datasheet range
1.23 to 1.29
1230 to 1290
~322 to 338 m
To read a brand datasheet, look for a line labeled "density" or "specific gravity" in the material properties or physical data block, take the g/cm3 figure for the printed (not the molded) state if both are listed, and enter that exact number rather than a generic 1.25 default so your weight and length estimates match the spool you actually loaded.
Frequently Asked Questions
What density should I use in my slicer for PETG?
Use 1.25 g/cm3 as the default for most PETG filaments. The actual range is 1.23 to 1.27 g/cm3 depending on brand and color additives. Check your filament's technical datasheet if available, especially for specialty PETG grades like carbon fiber reinforced (typically 1.20 to 1.30 g/cm3 depending on fiber loading). Cura defaults to 1.27 g/cm3 for PETG, which is slightly on the high side for most standard PETG.
How does PETG's higher density compare to PLA when estimating spool length?
At 1.25 g/cm3, a 1 kg spool of 1.75 mm PETG contains approximately 330 meters. At 1.24 g/cm3 (standard PLA), the same 1 kg spool has about 335 meters. The difference is small at 1 kg but adds up when ordering multiple spools for large prints. The practical takeaway: expect slightly less filament length per kilogram from PETG versus standard PLA.
Why is PETG denser than PLA or ABS?
PETG has a density of 1.23 to 1.27 g/cm³ compared to ABS (1.00 to 1.06 g/cm³) and most PLA grades (1.20 to 1.27 g/cm³). The terephthalate groups in PETG's polymer chain contain an aromatic benzene ring that allows molecular chains to pack more tightly. This higher density contributes to PETG's strength and chemical resistance, though it also means a 1 kg PETG spool contains fewer meters of filament than an equivalent ABS spool.
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