Empty spool weights by brand
Weigh the spool, subtract the number below, and you have the grams of filament left. Figures are typical weights with the spread we found; weigh your own once for exact numbers.
| Brand | Spool | Empty weight | Range | Type | Note |
|---|---|---|---|---|---|
| 3DJake | ecoPLA / niceABS plastic spool (1 kg) | 234 g * | 220–245 g | plastic | Single weigh-in of a 3DJake ecoPLA spool; 3DJake's rPLA cardboard spool is ~209 g. Treat as an estimate. source |
| Amazon Basics | Plastic spool (1 kg) | 232 g | 200–264 g | plastic | Two weigh-ins give 231 g and 234 g; batches vary widely (200-264 g reported) because Amazon Basics is multi-sourced. source |
| Anycubic | Thin plastic spool (1 kg) | 127 g | 120–135 g | plastic | Very light moulded spool (2024 PETG and PLA weigh-ins both give 127 g); 74 mm bore. source |
| Bambu Lab | Refill cardboard core only | 40 g | 37–44 g | cardboard | The o83/89 mm paper core that a refill is wound on; add the ~213 g reusable spool if the refill is mounted. source |
| Bambu Lab | Reusable plastic spool (1 kg), without cardboard core | 213 g | 208–216 g | plastic | Bare PC spool as sold separately or after the refill core is removed; owners weigh 208-216 g (High Temp grey variant ~210 g). source |
| Bambu Lab | Reusable spool + cardboard core, as shipped on 1 kg filament | 255 g | 250–260 g | plastic | What a factory-wound Bambu 1 kg spool weighs once empty (plastic spool plus the ~40 g cardboard core still inside). source |
| Creality | Hyper / Ender plastic spool (1 kg) | 140 g | 135–175 g | plastic | Standard Creality / Ender PLA spools weigh 135-141 g; Hyper PLA spools are reported heavier at ~173 g and CR-PETG ~188 g. source |
| Elegoo | Cardboard spool (1 kg) | 154 g | 144–165 g | cardboard | Elegoo lists 'empty spool weight 154 +/- 10 g' on its 1 kg product pages; Silk PLA ships on a plastic spool of similar weight. source |
| Elegoo | Rapid PLA+ translucent plastic spool (1 kg) | 156 g | 150–171 g | plastic | Thin translucent plastic spool used on Rapid PLA+ and most current Elegoo PLA; measured 153-171 g. source |
| eSUN | Cardboard spool (newer PLA / PLA+) | 160 g | 147–171 g | cardboard | Most eSUN PLA lines moved to cardboard in 2023-24; measurements cluster 147-171 g. source |
| eSUN | Classic plastic spool (1 kg, black or clear) | 230 g | 210–245 g | plastic | Clear spools ~210 g, black ~220-242 g; still used for PETG, ABS+, TPU and Silk PLA. eSUN's 2024 lightweight plastic spool is ~166 g. source |
| Fiberlogy | Plastic spool (850 g / 1 kg) | 300 g | 245–330 g | plastic | Fiberlogy's large-diameter spools are unusually heavy: Easy PLA 324-330 g, ASA 292 g, though one database lists 245 g for a newer grey spool. source |
| Fillamentum | Plastic spool (750 g / 1 kg) | 232 g | 218–258 g | plastic | Fillamentum PLA Extrafill and CPE HG100 spools cluster 230-236 g. source |
| Generic | 250 g sample spool | 65 g | 60–105 g | plastic | Elegoo lists 60 +/- 5 g for its 250 g spools and Sunlu's weigh 64 g; some brands (Eryone, Creality 200 g) use a heavier ~104 g mini spool. source |
| Generic | Small 500 g spool | 110 g * | 85–215 g | plastic | Dedicated narrow 500 g spools weigh roughly 85-130 g, but many 500 g products (e.g. eSUN) are wound on a full-size 1 kg spool at ~210 g. Estimate only. source |
| Generic | Cardboard spool (1 kg) | 140 g | 130–150 g | cardboard | Typical recycled-cardboard 1 kg spool; absorbs a few grams of moisture in humid rooms. source |
| Generic | Full-size plastic spool (1 kg) | 220 g | 200–240 g | plastic | Typical 200 mm diameter black plastic spool from unbranded or house-brand filament. source |
| Hatchbox | Plastic spool (1 kg) | 225 g | 224–245 g | plastic | Hatchbox's FAQ says 'about 225 g'; owner weigh-ins run 224-245 g depending on batch. source |
| Inland | Cardboard spool (1 kg, PLA Basics) | 143 g | 142–144 g | cardboard | Current Inland cardboard spool; Mystic Silk cardboard spools are heavier (~185 g). source |
| Inland | Plastic spool (1 kg, black or clear) | 218 g | 210–225 g | plastic | Clear plastic (Rainbow PLA) ~215 g, black plastic 210-225 g; Micro Center is phasing these out in favour of cardboard. source |
| JAYO | Cardboard spool (1.1 kg) | 125 g | 120–135 g | cardboard | Sunlu's budget sub-brand; JAYO plastic spools are similar at 127-135 g. One table lists 204 g, which is an outlier. source |
| Kingroon | Plastic spool (1 kg) | 150 g | 135–167 g | plastic | Two weigh-ins give 135 g and 154 g; chart range 135-167 g. source |
| Overture | Cardboard spool (1 kg) | 160 g | 132–176 g | cardboard | PLA / Matte / Rock PLA spools ~155-176 g; Overture PETG and ASA cardboard spools are lighter (~132 g), TPU heavier (~174 g). source |
| Overture | Plastic spool (1 kg, older Type I) | 237 g | 235–249 g | plastic | Pre-2023 black plastic spool; recent lightweight Overture plastic spools are 162-187 g. source |
| Polymaker | Cardboard spool (1 kg, PolyLite / Panchroma / PolySonic) | 140 g | 133–147 g | cardboard | Polymaker publishes 140 +/- 7 g for all 1 kg cardboard spools post-2023; 750 g spools are ~125 g, 500 g fibre-filled spools ~190 g. source |
| Polymaker | PolyTerra PLA cardboard spool (1 kg) | 143 g | 139–147 g | cardboard | Same recycled-cardboard spool family as PolyLite; two independent weigh-ins give 139 g and 147 g. source |
| Polymaker | Older plastic spool (pre-2023) | 250 g * | 240–260 g | plastic | Legacy black plastic spool used before Polymaker switched to cardboard; single-source figure. source |
| Prusament | Refill cardboard tube only | 40 g * | 35–50 g | cardboard | Prusament Refill ships as filament on a bare cardboard centre that clips into the reusable Prusament sides; single-source figure. source |
| Prusament | Standard 1 kg spool (plastic sides, cardboard tube) | 194 g | 191–205 g | plastic | Owners measure 191-196 g; Prusa's own spool calculator says ~205 g. Some newer NFC-tagged spools are reported heavier. source |
| Prusament | 2 kg spool | 227 g | 226–228 g | plastic | 226 g figure relayed from Prusa support on the Prusa forum; not published on an official spec page. source |
| Siraya Tech | Cardboard spool (1 kg) | 145 g * | 130–180 g | cardboard | No published or community weigh-in found; Siraya Tech PLA ships on a generic recycled-cardboard spool, so the generic cardboard figure is used. Weigh your own. source |
| Sunlu | Lightweight plastic spool (1 kg, current) | 130 g | 124–165 g | plastic | Current thin plastic spools weigh 124-135 g; older black Sunlu spools (pre-2022) were 189-220 g, so check which you have. source |
| Sunlu | Cardboard spool (1 kg) | 135 g * | 120–165 g | cardboard | Sunlu's cardboard spools are mostly sold under the JAYO brand (~125 g); the Sunlu-branded refillable/cardboard variants are reported around 163 g. Best estimate. source |
* estimated from similar spools; send us a scale reading and we will replace it.
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Questions people ask
How much does an empty Bambu Lab spool weigh?
About 213 g for the bare reusable plastic spool, or 255 g as shipped with the cardboard core still inside. A full factory 1 kg Bambu spool therefore reads roughly 1255 g on the scale. The refill cardboard core alone is about 40 g.
How do I work out how much filament is left?
Weigh the whole spool, subtract the empty-spool weight from this table, and you have the grams of filament. The spool remaining calculator turns that into metres and tells you whether your next print will finish.
Why do weights vary between spools of the same brand?
Moulded plastic spools vary by ±5 g, cardboard by ±10 g with humidity, and brands change suppliers. If you need precision, weigh your own empty spool once and write it on the flange.