The obvious bit
Model weight × your real cost per gram. Simple, but only part of the story.
From STL to a fair quote
Price the print.
Not just the plastic.
I made this after one too many “how much for this?” messages. Add the numbers from your slicer and get a price that covers the spool, the printer, your time and the prints that don't make it.
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PRINT_042.GCODEREADY
FILAMENT85 g
EST. TIME4h 30m
INPUT 01
What the slicer says
INPUT 02
What your bench costs
Material
Printer and power
Time and risk
Saved only on this device.
Under the build plate
The maths I kept forgetting.
The quiet costs
Power use and a little of the printer's purchase price for every hour it runs.
The part people miss
Setup time, failed-print risk and a profit margin because your time isn't free.