Scale-to-Net Tare Database
Remaining Filament & Spool Tare Weight Lookup
Put your partially used spool on a digital scale. Select your filament brand to subtract empty spool tare weight and verify whether your print will succeed overnight or run out mid-job.
Select Empty Spool Profile:
Remaining Filament Calculation
198gNet Filament Remaining:
~65.8 mOK
198g > 120g (+78g buffer)
Spool Remaining Percentage:19.8%
Remaining Filament &
Verified database: Bambu Lab, Polymaker, eSUN, Sunlu, Elegoo, Prusament.
| Brand | Spool Construction | Capacity | Empty Spool Tare (grams): | Notes |
|---|---|---|---|---|
| Bambu Lab | Reusable Plastic (Clear/White) | 1 kg | 212g | Standard injection-molded 2-piece twist-apart reusable spool shipped with Bambu filament. |
| Bambu Lab | Reusable High-Temp PC Spool | 1 kg | 248g | High-temperature polycarbonate variant designed for baking filament in dryers up to 90°C. |
| Bambu Lab | Cardboard Core Only (Refill) | 1 kg | 37g | Internal cardboard core tube remaining after an entire refill pack is exhausted. |
| Polymaker | Eco Cardboard Spool | 1 kg | 140g | Standard glued cardboard spool. Requires plastic adapter rings in Bambu AMS to prevent cardboard dust. |
| Polymaker | Cardboard Large Spool | 3 kg | 385g | Heavyweight industrial cardboard spool for bulk 3kg spools. |
| eSUN | Solid Black Plastic Spool | 1 kg | 240g | Rigid black polystyrene spool with large hub cutouts. |
| eSUN | Eco Cardboard Spool | 1 kg | 145g | Recycled cardboard spool on recent eSUN ePLA-Matte and ePLA-LW batches. |
| SUNLU | Black Ribbed Plastic Spool | 1 kg | 133g | Lightweight black plastic spool with radial triangular ribs. One of the lightest 1kg plastic spools. |
| SUNLU | Clear / Translucent Plastic Spool | 1 kg | 155g | Translucent plastic spool commonly used for PETG and Silk series. |
| SUNLU | Older Wide-Flange Plastic Spool | 1 kg | 195g | Older batch plastic spool with thicker outer rims. |
| Elegoo | Cardboard Spool (Brown) | 1 kg | 160g | Standard brown cardboard spool used on Rapid PLA+ and standard Elegoo PLA/PETG. |
| Elegoo | Black Plastic Spool | 1 kg | 220g | Found on early Elegoo filament batches. |
| Prusa Research | Composite Honeycomb (Plastic sides + Cardboard core) | 1 kg | 198g | Signature hexagonal skeleton flanges made of recycled plastic pressed onto a thick cardboard core. |
| Prusa Research | Prusament Refill Cardboard Core | 1 kg | 42g | Core only after dispensing a Prusa Refill spool onto an assembled spool. |
| Overture | Eco Cardboard Spool | 1 kg | 147g | Standard Overture brown cardboard spool with embossed remaining meters scale. |
| Overture | Clear Plastic (Older Gen) | 1 kg | 235g | Legacy transparent plastic spool used before Overture transitioned to cardboard. |
| Hatchbox | Solid Black Plastic Spool | 1 kg | 225g | Durable heavy-duty black plastic spool with large smooth sidewall. |
| Anycubic | Black Plastic Spool | 1 kg | 210g | Standard black plastic spool for Anycubic Silk and High-Speed PLA. |
| Anycubic | Cardboard Spool | 1 kg | 150g | Newer eco-packaging series. |
| Creality | White / Grey Plastic Spool | 1 kg | 185g | CR-Series and Ender Series filament plastic spool. |
| Creality | Hyper PLA Cardboard Spool | 1 kg | 145g | Lightweight cardboard spool used with high-speed Hyper PLA. |
| Inland (Micro Center) | Cardboard Spool | 1 kg | 140g | Standard brown cardboard spool from Micro Center. |
| Inland (Micro Center) | Clear Plastic Spool | 1 kg | 220g | Earlier Inland plastic spool (often manufactured by eSUN). |
| MatterHackers | Build Series Plastic Spool | 1 kg | 215g | Solid dark plastic spool used on MH Build Series PLA & ABS. |
| MatterHackers | Pro Series Heavy Plastic Spool | 1 kg | 250g | Heavy-duty plastic spool engineered for precision winding on Pro series Nylon & TPU. |
| ERYONE | Cardboard Spool | 1 kg | 152g | Printed cardboard spool for Dual-Color and Tri-Color Silk PLA. |
| ERYONE | Clear Plastic Spool | 1 kg | 230g | Clear plastic spool with wide edge rim. |
| FormFutura | EasyFil Cardboard Spool | 1 kg | 145g | European recycled cardboard spool. |
| colorFabb | Clear Rigid Plastic Spool | 0.75 kg | 210g | Clear spool for 750g specialty filaments (nGen, XT-CF20). |
| Generic / Unlisted | Average Cardboard Spool (1kg) | 1 kg | 150g | Average tare weight for most modern 1kg cardboard spools (±15g). |
| Generic / Unlisted | Average Plastic Spool (1kg) | 1 kg | 225g | Average tare weight for traditional 1kg rigid plastic spools (±25g). |
Spool Tare - FAQ
Q1What is empty spool tare weight?
Tare weight is the weight of the empty plastic or cardboard spool itself without any filament on it. Subtracting known tare weight from total scale reading reveals the exact remaining net filament in grams: Net Filament = Gross Scale Weight - Empty Spool Tare Weight.
Q2How much does an empty Bambu Lab spool weigh?
The standard Bambu Lab reusable 2-piece injection-molded plastic spool weighs approximately 212 grams (high-temperature polycarbonate versions weigh 248g). Bambu cardboard refills alone weigh about 37 grams.
Q3How much does a Polymaker cardboard spool weigh?
A standard 1 kg Polymaker cardboard spool weighs approximately 140 grams (±10g).