Spool Remaining Calculator
Weigh a used spool to estimate its remaining grams, length and value.
Filament Inventory Manager
Track individual spools, measured corrections, usage and portable backups.
Spool details
Calculation method
Physical stock changes only through measured correction or confirmed actual consumption. Reservations are tracked independently. Low stock means less than 100 g.
How to use this tool
Use one record per spool. Archive rather than delete to preserve references. Export backups regularly; browser storage can be cleared or evicted. Imports replace the complete database only after validation and confirmation. CSV exports inventory; JSON includes projects, allocations, usage and settings.
Related tools
Filament Weight & Length Converter
Convert mass, length and volume using your filament diameter and density.
Enough Filament Checker
Check one spool against a slicer estimate and an explicit safety allowance.
Related guides
How to Track Opened Filament Spools
How can an inventory remain useful after several partial prints?
How to Compare Estimated and Actual Filament Use
How can repeated estimates become better informed?