Empty spool weights by brand

The empty spool weight is the number you need before a kitchen scale can tell you how much filament is left. These pages collect community-measured tare weights per brand, with the Remaining Filament Calculator preset to the right spool.

4 spool types

Bambu Lab empty spool weight

How much a Bambu Lab spool weighs empty: reusable spool ~208 g, with refill core ~233 g, cardboard spool ~205 g. Weigh your spool and get grams of filament left.

3 spool types

Polymaker empty spool weight

Polymaker spool weights empty: the current cardboard spool is 140 g (Polymaker's own spec), older plastic spools are ~215 g. Weigh your spool for the filament you have left.

2 spool types

eSun empty spool weight

eSun empty spool weights: most current spools ~200 g, older black plastic spools up to ~224 g. Weigh your spool and calculate remaining filament in grams.

1 spool type

Prusament empty spool weight

Prusament spools weigh about 200 g empty (community measurements run 192 to 207 g). Weigh your spool and get grams of filament remaining in seconds.

Brand not listed? The Remaining Filament Calculator takes any custom empty weight.