How to use
- For remaining material, weigh the spool and enter a measured or documented empty-spool tare.
- Optionally enter the slicer’s job mass and an additional mass reserve. Leave the job empty when you only need the remaining amount.
- For length–mass conversion, supply filament diameter and the density of the actual material.
- Review usable mass, sufficient or short status, and the numerical margin before deciding whether to start the print.
Calculation method
Usable remaining mass = gross spool mass − empty-spool mass. A job requires entered job mass + mass reserve, and sufficiency compares those quantities before display rounding. For circular filament, cross-sectional area = π × (diameter / 2)². Density converts its geometric volume to mass, allowing length to be solved from mass or mass from length. The diameter and density must describe the same material assumed by that conversion.
Worked example
A gross spool mass of 320 g with a 180 g tare leaves 140 g usable filament. A 100 g job and no added reserve leaves a 40 g margin by mass. With entered density 1.24 g/cm³ and diameter 1.75 mm, 100 g corresponds to about 33.528362 m of filament. The density is a calculation input, not a universal value for all material sold under one polymer name.
Assumptions and limits
Tare and density are not inferred from a brand-independent preset. The comparison does not allow automatically for scale error, slicer error, moisture, inaccessible spool-end material or feeding failures. A blank job means no sufficiency verdict; an explicitly zero job is a different input. The tool checks material quantity and does not predict print success.
Continue your plan
Price a job with the 3D printing cost calculator, check its flow demand, or inspect a uniform scale and fit change.
Copy, download or print a valid result to keep the inputs with the estimate. Currency selections label your prices; they do not apply an exchange rate. Product-dependent examples should be replaced with data for the material or equipment you actually use.
For the measurement and planning details, read checking filament remaining from spool weight and density.