Density Converter
Convert material density between g/cm³, kg/m³ and lb/ft³. Compare filament types, resin properties, or material specs for shipping and workshop calculations.
Last updated: May 2026
Enter a value to see the conversion instantly.
How to use this density converter
Enter density in any unit and see it in all others. The quick buttons show common 3D printing filaments: ABS at 1.04 g/cm³, PLA at 1.24 g/cm³, PETG at 1.27 g/cm³, and aluminum at 2.7 g/cm³ for reference. Use this when comparing materials, calculating shipping weights, or understanding material datasheets.
Common material density reference
| Material | g/cm³ | kg/m³ | lb/ft³ |
|---|---|---|---|
| Water (reference) | 1.00 | 1000 | 62.4 |
| ABS filament | 1.04 | 1040 | 64.9 |
| ASA filament | 1.07 | 1070 | 66.8 |
| TPU filament | 1.21 | 1210 | 75.5 |
| PLA filament | 1.24 | 1240 | 77.4 |
| PETG filament | 1.27 | 1270 | 79.3 |
| Standard resin | 1.15-1.20 | 1150-1200 | 71.8-74.9 |
| Aluminum | 2.70 | 2700 | 168.6 |
| Steel | 7.85 | 7850 | 490.1 |
When you need this tool
Your filament calculator needs density in g/cm³ but the datasheet lists kg/m³, off by a factor of 1000 and your length estimate is completely wrong. Or you're comparing two resin types and one spec is in lb/ft³ while the other is g/cm³, and you need to know which is actually heavier before ordering. Or you're calculating shipping weight for bulk material and the units don't match your scale. Get the density conversion wrong and your weight estimates collapse. This converter ensures you're working with the right numbers for material selection, weight calculations, and shipping decisions.
Frequently Asked Questions
When do I need to convert density units?
Materials come with density specs in different units. Filament datasheets list kg/m³. Resin specs show g/cm³. Shipping and weight calculations might need lb/ft³. Converting between them is essential for accurate weight estimates and material selection.
What is the relationship between g/cm³, kg/m³ and lb/ft³?
1 g/cm³ = 1000 kg/m³ = 62.43 lb/ft³. Water is exactly 1 g/cm³. Most plastics are 1.0-1.4 g/cm³. Getting this conversion right is critical for weight calculations.
Why does this matter for 3D printing or resin casting?
If your spool weight is 1 kg but you calculate using the wrong density unit, your filament length estimate is off. For resin, wrong density leads to over-ordering or underestimating cure times. Exact conversion prevents wasted material and time.