PLA is the most common 3D printing filament, and its density sits in a narrow band: standard PLA is 1.24 g/cm3 (1240 kg/m3), while silk, matte, and wood-filled blends shift that figure up or down a few hundredths. Enter a density value below to convert between g/cm3 and kg/m3. Density matters because it links a spool's weight to its usable length: a heavier blend gives you fewer meters per kilogram, so the right density keeps your slicer's filament estimates honest.
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. For standard PLA: 1.24 g/cm3 × 1000 = 1240 kg/m3. Some slicers accept density in g/cm3, others in kg/m3, so enter your filament's datasheet value here to confirm the right unit before saving it in your slicer profile.
Real PLA densities cluster tightly between 1.23 and 1.28 g/cm3, not the wide range a generic table might suggest. The figures below are typical published values for common 1.75 mm PLA blends, along with the approximate usable length you get from a 1 kg spool at each density. Heavier blends pack the same kilogram into fewer meters, which is exactly why density drives spool-weight-to-length estimates.
PLA type
Density (g/cm³)
Density (kg/m³)
Meters per 1 kg spool (1.75 mm)
Standard PLA
1.24
1240
approx 335 m
PLA+
1.25
1250
approx 332 m
Silk PLA
1.23
1230
approx 338 m
Matte PLA
1.27
1270
approx 327 m
Wood-fill PLA
1.28
1280
approx 325 m
Frequently Asked Questions
Does PLA density change by color, and does it affect my slicer estimates?
Yes. Color pigments add mass. White and yellow PLA often use titanium dioxide or cadmium-based pigments that raise density slightly. Glow-in-the-dark PLA uses strontium aluminate and can reach 1.50 g/cm3, making it significantly heavier per meter. If your slicer consistently overestimates or underestimates filament use, the cause is usually a mismatch between the configured density and the actual density of your specific spool.
How many meters of 1.75 mm PLA are on a standard 1 kg spool?
At 1.24 g/cm3 (the most common PLA density), a 1 kg spool of 1.75 mm PLA contains approximately 335 meters. At 1.20 g/cm3, the same spool contains about 346 meters. At 1.27 g/cm3, it's approximately 327 meters. These differences matter when planning multi-day prints or comparing brands with different density specs.
How does PLA density affect slicer filament estimates?
PLA density is typically 1.24 g/cm³ but varies from 1.20 to 1.27 g/cm³ depending on color pigment and brand formulation. Most slicers default to 1.24 g/cm³. If your PLA is actually 1.20 g/cm³ and the slicer uses 1.24, it overestimates print weight by about 3%. For best accuracy, enter the density from your filament's technical datasheet directly into your slicer settings.
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