G-Code output file name format to include Used Filament in meters & grams - PrusaSlicer

RE:

Green Joe — Tue, 17 Mar 2026 00:25:31 +0000

In case you're still looking, it's possible to include a rounded mass of filament with

{int(total_weight*10) / 10.0}g

https://github.com/prusa3d/PrusaSlicer/issues/3472

RE: G-Code output file name format to include Used Filament in meters & grams

Jb9 — Sun, 20 Oct 2024 03:54:17 +0000

Thanks @neophyl. I guess I had found the "used_filament" placeholder in the list you referenced above. It was not clear from that documentation however what units are output. It turns out to be length in meters as the default.

I couldn't figure out if there was a way to specify another unit with placeholder indexing or not, so I decided to get creative with mass. It is a relatively easy matter to calculate used filament mass in grams as (length) x (area) x (mass density). We already have (length) = "used_filament" in meters. We can calculate (area) as (Pi/4) x "filament_diameter" in mm_squared. . That leaves (mass density) = "filament_density" in gram/cm_cubed. It turns out that 1 cm_cubed = 1000 mm_cubed so the final units are correctly output in grams.

It is very important to enter the correct parameters for the filament being used in the Prusa software under "Filaments/Filament/Diameter and Filaments/Filament/Density". The filename values should then match those listed under sliced info.

RE: G-Code output file name format to include Used Filament in meters & grams

Neophyl — Fri, 18 Oct 2024 22:06:50 +0000

Output format placeholders are listed on the knowledge base here https://help.prusa3d.com/article/list-of-placeholders_205643#output-filename-format-fdm

and macro's for adjusting them such as decimal places etc are listed here https://help.prusa3d.com/article/macros_1775

Theres also the old ways that predate the newer added functions such as digits or round etc which you can read about in a previous thread in this forum https://forum.prusa3d.com/forum/prusaslicer/howto-round-file-output-name-placeholder-total_cost/

G-Code output file name format to include Used Filament in meters & grams

Jb9 — Fri, 18 Oct 2024 19:32:56 +0000

Sorry if this information already exists elsewhere, but I couldn't find it in any online forums...

The following script entered in "Print Settings/Output options/Output Format Filename" will add the amount of Used Filament in both meters (m) and grams (g) to the G-Code Output Filename:

{input_filename_base}_{print_time}_{digits(used_filament,1,2)}m_{digits(used_filament*3.1415626*filament_diameter*filament_diameter/4*filament_density,1,2)}g_{digits(layer_height,1,2)}mm_{temperature}C_{filament_type}_{printer_model}.gcode

(Note: Results verified for PrusaSlicer Version: 2.8.1+win64)