Filament Weight to Length Calculator
Calculate how much filament length you have from the remaining spool weight. Supports PLA, PETG, TPU, ABS and ASA in both 1.75mm and 2.85mm diameters.
Last updated: May 2026
Enter weight to calculate filament length.
How to use this filament calculator
Weigh your remaining filament (without the spool), select the material type and diameter, and see how many meters you have left. The quick buttons cover common partial spool weights. Know if you have enough to finish that 18-hour print without running out halfway.
Material density reference
| Material | Density (g/cm³) | 250g = meters (1.75mm) | 500g = meters (1.75mm) |
|---|---|---|---|
| PLA | 1.24 | ~82 m | ~164 m |
| PETG | 1.27 | ~80 m | ~160 m |
| TPU | 1.21 | ~84 m | ~168 m |
| ABS | 1.04 | ~98 m | ~196 m |
| ASA | 1.07 | ~95 m | ~190 m |
When you need this tool
Your Bambu Lab slicer says the print needs 78 meters but you don't know if your partial spool has enough. Or you're planning a multi-color print and need to verify each color has sufficient length. Or you bought a refill spool that doesn't list the remaining length. Weigh it, enter the weight here, and know exactly how much filament you have before starting that long print.