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Filament

Empty filament spool weights

Weigh your spool, subtract the empty weight, and you know how much filament is left. Here are the empty weights we could find, and how far each can be trusted.

For the most accurate result, weigh one of your own empty spools. Makers change their spools from time to time, so two spools from the same brand can differ by 50 g or more. The figures below are a good starting point when you do not have an empty one to hand.

BrandSpoolEmpty weightReported valuesFilamentMeasured bySource
Bambu LabReusable spool, bare (no cardboard core mounted)212 g208 to 216 g1000 gCommunityfilamentcalcs.com
Bambu LabReusable spool + cardboard core, as-shipped (default filament purchase, not a refill)not stated233 to 250 g1000 gCommunityfilamentcalcs.com
Bambu LabRefill cardboard core only (no reusable spool)not stated25 to 41 g1000 gCommunityfilamentcalcs.com
Bambu Lab1 kg cardboard spool (filament sold without a reusable spool)205 gone reading1000 gCommunityfilamentcalcs.com
Bambu LabReusable spool, gen-1 transparent/clip design (older, high-temp line)257 g251 to 264 g1000 gCommunityfilamentcalcs.com
ColorFabb0.75 kg spool (specialty-line typical fill size)236 gone reading750 gCommunitystldenise3d.com
Creality1 kg plastic spool, standard PLA/PETG lines140 gone reading1000 gCommunitystldenise3d.com
Elegoo1 kg plastic spool160 gone reading1000 gCommunityonlyspoolz.com
eSUN1 kg plastic spool, current/classic line220 g200 to 240 g1000 gCommunityfilamentcalcs.com
eSUN1 kg cardboard spool, lightweight150 gone reading1000 gCommunityspoolvault.com
eSUN1 kg cardboard spool, reinforced165 gone reading1000 gCommunityspoolvault.com
eSUN1 kg plastic spool, older black design224 gone reading1000 gCommunityfilamentcalcs.com
eSUN1 kg heavy plastic spool (HIPS)278 gone reading1000 gCommunityspoolvault.com
Fillamentum0.75 kg spool (Extrafill-line typical fill size)230 gone reading750 gCommunitystldenise3d.com
generic1 kg plastic spool, most common/unbrandednot stated200 to 240 g1000 gCommunitytools.creative3dp.com
generic1 kg cardboard spool, most common/unbrandednot stated130 to 150 g1000 gCommunitytools.creative3dp.com
Hatchbox1 kg plastic spoolnot stated210 to 244 g1000 gCommunityspoolvault.com
Overture1 kg plastic spoolnot stated171 to 237 g1000 gCommunityspoolvault.com
Overture1 kg cardboard spool (Matte PLA, Super PLA+)163 gone reading1000 gCommunityspoolvault.com
Polymaker1 kg cardboard spool (PolyLite, PolyMax, Panchroma, PolySonic PLA; PolyLite ABS/ASA/PC and other current lines)140 gone reading1000 gManufacturerwiki.polymaker.com
Polymaker0.5 kg cardboard spool190 gone reading500 gManufacturerwiki.polymaker.com
Polymaker0.75 kg cardboard spool125 gone reading750 gManufacturerwiki.polymaker.com
Polymaker2 kg cardboard spool370 gone reading2000 gManufacturerwiki.polymaker.com
Polymaker3 kg cardboard spool425 gone reading3000 gManufacturerwiki.polymaker.com
Polymaker5 kg plastic spool (PP)819 gone reading5000 gManufacturerwiki.polymaker.com
PolymakerPolyTerra, 1 kg cardboard spool140 gone reading1000 gManufacturerwiki.polymaker.com
Polymaker1 kg plastic spool, legacy/older design (pre-cardboard switch, being phased out)215 gone reading1000 gCommunityfilamentcalcs.com
Prusament1 kg spool (plastic sides + cardboard tube)200 g192 to 207 g1000 gCommunityfilamentcalcs.com
Sunlu1 kg plastic spoolnot stated133 to 189 g1000 gCommunityspoolvault.com
Last checked 2026-09-20. Have a spool that is missing or different? Email contact@layertune.com with a photo of it on a scale and we will add it.

Use it

The filament length and weight calculator has these as presets. Put the spool on a kitchen scale, pick the brand, and it tells you the grams and metres left, so you know before you start whether a print will finish.

Why there is no single right number

Spools vary by material (plastic or cardboard), by production run and by size. Refill systems use a reusable core with a much lighter insert. Two people weighing "the same" spool a year apart can both be right.