When this helps
Subtract the empty spool weight and estimate how much filament remains. Start with Weighed spool; this calculator reports Filament remaining.
Tools · Filament
Filament left on a spool
Subtract the empty spool weight and estimate how much filament remains.
Results
- Filament remaining
- 500 g
- Filament length
- 167.64181 m
Method
Remaining grams = weighed spool − empty spool. Convert that mass to length using diameter and density.
Worked example
Example inputs
- Weighed spool
- 700 g
- Empty spool weight
- 200 g
- Filament diameter
- 1.75 mm
- Material density
- 1.24 g/cm³
Calculated outputs
- Filament remaining
- 500 g
- Filament length
- 167.64181 m
How to read the result
With these example inputs, Filament remaining is 500 g. Use that value for the setting or decision named above, and read the other outputs as supporting checks.
Common mistake
Do not leave Weighed spool at the example value of 700 g unless it matches your own measurement.
Assumptions and limits
Use the weight of the same empty spool. Remove packaging and accessories; the remaining material must not weigh less than zero.