Empty 3D Filament Spool Weight & Tare Database (25+ Brands)
Most empty 1kg plastic 3D printer spools weigh between 200g and 250g (e.g., Bambu Lab reusable spool ≈ 250g, eSun ABS plastic ≈ 245g), while cardboard spools weigh between 130g and 160g (e.g., Polymaker PolyTerra ≈ 140g, eSun Cardboard ≈ 135g). To calculate remaining filament: W_net = W_scale - W_tare.
Master Reference Lookup Table
Filter by name or click column headers to sort specifications.
| Action | |||||||
|---|---|---|---|---|---|---|---|
| Amazon Basics (Black Plastic) | Plastic | 238g(8.4 oz) | ±5g | 200mm | 54mm | Direct Fit | Spool Calculator → |
| Bambu Lab (Reusable Spool) | Plastic | 250g(8.8 oz) | ±5g | 200mm | 82mm | Direct Fit | Spool Calculator → |
| Creality (Hyper Series Plastic) | Plastic | 240g(8.5 oz) | ±5g | 200mm | 53mm | Direct Fit | Spool Calculator → |
| Duramic 3D (Cardboard Spool) | Cardboard | 145g(5.1 oz) | ±8g (RH) | 200mm | 54mm | Rim Ring Req. | Spool Calculator → |
| Eryone (Eco Cardboard) | Cardboard | 140g(4.9 oz) | ±8g (RH) | 200mm | 54mm | Rim Ring Req. | Spool Calculator → |
| eSun (Clear Plastic Spool) | Plastic | 245g(8.6 oz) | ±5g | 200mm | 53mm | Direct Fit | Spool Calculator → |
| eSun (Eco Cardboard Spool) | Cardboard | 135g(4.8 oz) | ±8g (RH) | 200mm | 54mm | Rim Ring Req. | Spool Calculator → |
| Generic MasterSpool / Printed Spool | MasterSpool | 180g(6.3 oz) | ±5g | 200mm | 52mm | Direct Fit | Spool Calculator → |
| Hatchbox 3D (Black Plastic) | Plastic | 230g(8.1 oz) | ±5g | 200mm | 55mm | Direct Fit | Spool Calculator → |
| Inland / Micro Center (Black Plastic) | Plastic | 248g(8.7 oz) | ±5g | 200mm | 53mm | Direct Fit | Spool Calculator → |
| Overture (Original Plastic Spool) | Plastic | 220g(7.8 oz) | ±5g | 200mm | 54mm | Direct Fit | Spool Calculator → |
| Overture (Recycled Cardboard) | Cardboard | 150g(5.3 oz) | ±8g (RH) | 200mm | 54mm | Rim Ring Req. | Spool Calculator → |
| Polymaker (Panchroma Cardboard) | Cardboard | 140g(4.9 oz) | ±8g (RH) | 200mm | 55mm | Rim Ring Req. | Spool Calculator → |
| Prusament (Honeycomb Plastic + Core) | Plastic | 200g(7.1 oz) | ±5g | 200mm | 51mm | Direct Fit | Spool Calculator → |
| Sunlu (Slotted Plastic Spool) | Plastic | 210g(7.4 oz) | ±5g | 200mm | 73mm | Direct Fit | Spool Calculator → |
Core Mathematical & Engineering Breakdown
Datasheet equations, derivations, and step-by-step worked shop math.
Why Cardboard Spool Tare Weights Fluctuate by ±10g
Cardboard spools are hygroscopic cellulose matrices bound with PVA or starch-based adhesives. In a humid workshop (60%+ RH), an empty 140g cardboard spool absorbs 4g to 7g of atmospheric moisture within 72 hours. When placed inside a heated active filament dryer at 50°C for 6 hours, that moisture evaporates, dropping the spool's baseline tare weight by up to 5%. For precision print farm metering, always weigh the spool immediately after drying or record tare weight from an identical virgin empty spool dried under the same thermal profile.
How to Convert Net Grams to Remaining Meters & Feet
Filament volume equals mass divided by density: V = M / ρ. For a cylindrical extrusion with nominal diameter d, cross-sectional area is A = π · (d / 2)². The linear length is therefore L = V / A = (4 · M) / (π · ρ · d²). For standard 1.75mm PLA (density 1.24 g/cm³), 1 gram yields approximately 0.335 meters (1.10 feet). For 2.85mm filament, cross-sectional area increases by 2.65×, reducing linear yield to approximately 0.127 meters per gram.
Bambu Lab AMS & AMS Lite Spool Dimension Limits
The Bambu Lab Automated Material System (AMS) operates with strict internal geometry: maximum outer spool flange diameter is 202mm (optimal 197mm–202mm), spool width must remain between 50mm and 68mm, and the center hub bore must measure at least 50mm. Spools under 195mm fail to contact the motorized rubber drive rollers cleanly, causing retract slippage. Printed TPU/PLA rim adapters add 12g to 18g to overall tare weight and must be deducted from scale measurements.
Interactive Micro-Tool: Real-Time Calculation
Adjust sliders and inputs below to calculate custom dimensions instantly.
Input Parameters & Presets
Pre-loads exact volumetric density required to calculate length.
Pre-loads empty spool deduction (Plastic).
Weigh your half-used spool directly on any digital kitchen scale.
100% of 1000g reference spool
Excludes 250g empty tare
8 hrs on Bambu Lab P1S
1.75mm diameter profile
Order Fresh 1kg Spool of PLA (Polylactic Acid)
High-speed, tangle-free PLA (Polylactic Acid) filament with ±0.02mm tolerance for reliable prints.
Failure Modes & Workshop Troubleshooting Matrix
Common fabrication failures, caliper inspection methods, and prevention rules.
| Failure Mode | Root Cause | Caliper / Scale Check | Shop Prevention |
|---|---|---|---|
| Mid-print runout despite scale calculation showing 30g left | Unaccounted cardboard spool moisture absorption or heavy mold seam batch variance | Tare weight was assumed 140g but moisture-laden cardboard actually weighed 154g | Add a 25g safety reserve buffer in slicer estimate before starting 12hr+ jobs |
| AMS roller spinning without retracting spool | Spool flange diameter under 195mm or dented cardboard flange slipping on drive roller | Caliper measurement shows 192mm outer diameter or chewed cardboard rim | Install snap-on rim protector rings or respool onto Bambu reusable master spool |
| Filament jams during extrusion near end of spool | Tape adhesive residue from manufacturer filament anchoring knot entering PTFE tube | Visual inspection reveals glued tape tail caught in extruder drive gear | Clip the last 15cm of filament before tape segment enters the toolhead |
Frequently Asked Engineering Questions
High-intent technical fabrication inquiries verified against lab standards.
Q1What is the average tare weight of an empty 1kg filament spool?
Q2Can I use cardboard filament spools in the Bambu Lab AMS?
Q3How much weight does moisture add to a cardboard spool?
Q4How do I calculate remaining print time from spool weight?
Related Programmatic Calculators in this Silo
Launch individual entity calculators pre-configured with exact manufacturer specifications: