Plastic spool (1 kg filament)
201 g empty spool
Manufacturer source · Nominal filament: 1000 g
Prusa publishes 201 g for the empty 1 kg Prusament plastic spool. Spool designs can change, so verify your own spool when precision matters.
Makeratory Resources / Empty spool weights
Prusament empty spool weight
Use these sourced tare weights to estimate how much filament remains on a Prusament spool. Spool designs and production batches can change, so weighing your own empty spool is still the most precise method.
Cardboard spool (1 kg filament)
184 g empty spool
Manufacturer source · Nominal filament: 1000 g
Prusa publishes 184 g for the empty 1 kg Prusament cardboard spool. Spool designs can change, so verify your own spool when precision matters.
Plastic spool (2 kg filament)
350 g empty spool
Manufacturer source · Nominal filament: 2000 g
Prusa publishes 350 g for the empty 2 kg Prusament plastic spool. Spool designs can change, so verify your own spool when precision matters.
How to calculate filament remaining
Weigh the loaded spool, then subtract the empty-spool tare weight. For example, a loaded spool weighing 720 g with a 220 g empty spool has about 500 g of filament remaining.
Track every Prusament spool you own
Makeratory keeps each spool’s remaining weight, material, color, location, and cost together so you can see what is available before planning the next print.
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