The small-spool workshop
Make a plan for the filament you already have.
Free planning tools for partial spools, repeat print jobs and material waste. Start with your measured weights. Leave with a clear, printable plan.
01 / Workbench
Choose the problem you are solving.
Multi-spool print job calculator
Work out how many complete prints each partial filament spool can finish, with extra waste and a reserve per spool.
CALCULATORFilament grams to meters calculator
Convert filament weight to length using an editable diameter and material density. See the grams per meter behind the result.
CALCULATOR3D print purge and waste cost calculator
Separate part material cost from supports, purge and other waste, using your actual spool price and net weight.
02 / Field notes
The method behind the numbers.
How to plan a batch with partial filament spools
A practical weighing and scheduling workflow that avoids counting separate leftovers as one continuous spool.
GUIDEWhy filament mass and length do not convert with one fixed number
Understand the effects of diameter, density and spool tare when converting grams into meters.
GUIDEA simple worksheet for comparing multicolor print waste
Compare total consumed material, waste share and material cost without mixing up different denominators.