Prusament Empty Spool Weight and Filament Remaining
An empty Prusament spool weighs about 200 g.
Your measurements
Weigh your spool and pick the material and brand. Everything updates as you type.
Filament
Typical density for this material. Use your filament's data sheet if it gives one.
Most printers use 1.75 mm; some, such as Ultimaker, use 2.85 mm. It is printed on the spool label.
Spool
Prusament 1 kg spool: 200 g typical, 192–207 g reported.
Put the spool, with its filament, on a kitchen scale.
Rough fill level
Electricity (optional)
Typical average draw, estimated. A plug-in power meter gives your printer's real figure.
Results
PLA (Polylactic Acid) left on the spool
m
= 1100.1 ft
About 100% of a 1000 g spool. Compare this with the filament length your slicer shows for the print.
- Filament weight
- 1000g
- = 35.27 oz
- Scale weight minus 200 g empty spool
- Electricity for the print
- $0.14
- 8 h on Bambu Lab P1S (estimated draw)
Check before you print (2)
- Empty spools from this brand vary by about ±8 g, so the remaining length could be off by about ±3 m. Weigh one of your own empty spools and enter it for an exact figure.
- 1.24 g/cm³ is a typical density for PLA (Polylactic Acid). Brands differ by a few percent, and the length changes by the same percentage. Use the density on your filament's data sheet if you have it.
How this was calculated
Weight to length, with your numbers.
How this was calculated
Weight to length, with your numbers.
Step 1: Subtract the empty spool
W_net = W_total − W_spool
= 1200 g − 200 g
= 1000 g of filamentPrusament (plastic sides + cardboard core) spools are taken as 200 g (192–207 g reported). A ±8 g spread changes the answer by about 3 m.
Step 2: Cross-section of 1.75 mm filament
A = π × (d ÷ 20)²
= π × (0.0875 cm)²
= 0.024053 cm²The diameter in millimetres is halved and converted to centimetres so the units match the density in g/cm³.
Step 3: Length from weight
L = W_net ÷ (ρ × A × 100)
= 1000 g ÷ (1.24 g/cm³ × 0.024053 cm² × 100)
= 335.3 mDividing by density and cross-section gives centimetres; ÷100 gives metres. A density that is 2% off makes the length 2% off.
Step 4: Electricity for the print
Cost = watts × hours ÷ 1000 × price per kWh
= 110 W × 8 h ÷ 1000 × $0.16
= $0.14110 W is an estimated average for the Bambu Lab P1S. A plug-in power meter gives your printer's real figure.
Sources
PLA (Polylactic Acid): density
EstimatedTypical value, not from a maker's document. Measure or confirm before relying on it.
Prusament (plastic sides + cardboard core): empty spool weight
From sourceFrom a published reference; brands and batches vary. Checked 23 Oct 2026.
- LayerTune: empty filament spool weights by brand (community readings) (Prusament 1 kg spool: 200 g, 192–207 g reported (source: filamentcalcs.com)), opened 23 Oct 2026
In short
An empty Prusament spool weighs about 200 g (192–207 g reported). 1200 g on the scale is a full 1 kg; 700 g is half.
The calculator starts with Prusament spool and PLA selected; change the material to match your spool.
Scale reading to filament left
Each row adds the 200 g empty spool to the filament. Lengths are for 1.75 mm filament at typical densities (PLA 1.24, PETG 1.27 g/cm³).
| On the scale | Filament | PLA | PETG | Of a full spool |
|---|---|---|---|---|
| 300 g | 100 g | 33.5 m | 32.7 m | 10% |
| 450 g | 250 g | 83.8 m | 81.8 m | 25% |
| 700 g | 500 g | 167.6 m | 163.7 m | 50% |
| 950 g | 750 g | 251.5 m | 245.5 m | 75% |
| 1200 g | 1000 g | 335.3 m | 327.4 m | 100% |
Prusament spool facts
| Item | Value |
|---|---|
| Empty spool weight | 200 g (192–207 g reported) |
| Where the figure comes from | Community readings |
| Spool material | Plastic |
| Filament on a full spool | 1000 g |
| Size | About 200 mm across and 68 mm wide (typical 1 kg spool size; not confirmed for Prusament) |
Prusament 1 kg spool: 200 g typical, 192–207 g reported.
Empty weight, Prusament spool
From sourceFrom a published reference; brands and batches vary. Checked 23 Oct 2026.
- LayerTune: empty filament spool weights by brand (community readings) (Prusament 1 kg spool: 200 g, 192–207 g reported (source: filamentcalcs.com)), opened 23 Oct 2026
Other brands
- Bambu Lab242 g plastic
- eSun220 g plastic · 150 g cardboard
- Polymaker140 g cardboard
- Hatchbox227 g plastic
- Sunlu161 g plastic
- Overture163 g cardboard · 204 g plastic
- Creality140 g plastic
All 15 spools, with sources, in the empty spool weights table
Worked example: a full Prusament spool of PLA
The three steps behind the result, using the 200 g empty weight.
Step 1: Subtract the empty spool
W_net = W_total − W_spool
= 1200 g − 200 g
= 1000 g of filamentPrusament (plastic sides + cardboard core) spools are taken as 200 g (192–207 g reported). A ±8 g spread changes the answer by about 3 m.
Step 2: Cross-section of 1.75 mm filament
A = π × (d ÷ 20)²
= π × (0.0875 cm)²
= 0.024053 cm²The diameter in millimetres is halved and converted to centimetres so the units match the density in g/cm³.
Step 3: Length from weight
L = W_net ÷ (ρ × A × 100)
= 1000 g ÷ (1.24 g/cm³ × 0.024053 cm² × 100)
= 335.3 mDividing by density and cross-section gives centimetres; ÷100 gives metres. A density that is 2% off makes the length 2% off.
Notes on Prusament spools
- Prusament spools use plastic sides with a cardboard tube.
- Readings range from 192 to 207 g empty.
- Weigh one of your own empty spools from this brand for an exact figure.
Prusament spool: common questions
Empty weight, accuracy and the scale method.
How much does an empty Prusament spool weigh?
Prusament 1 kg spool: 200 g typical, 192–207 g reported. Weighing one of your own empties is the most accurate figure.
How do I check how much filament is left on a Prusament spool?
Weigh the spool and subtract 200 g. For example, a reading of 700 g means about 500 g of filament, which is roughly 167.6 m of 1.75 mm PLA or 163.7 m of PETG.
How accurate is the empty weight?
Reported weights run from 192 g to 207 g, so a reading can be off by up to about 8 g, or roughly 2.7 m of PLA. Weigh one of your own empty spools to remove that error.