Estimate remaining filament by weight, then check runout risk with a safety margin. Everything runs locally, ad-free.
Tip: if your slicer estimate is optimistic, use a larger margin for long prints.
This is an estimate based on density and nominal diameter. If you know your filament’s exact density, use Custom.
Common questions about estimating remaining filament by weight and avoiding mid-print runout.
If you have the same spool type, weigh an empty one and reuse that value. Otherwise, many spools have a typical tare in the 180–300 g range, but it varies a lot — so treat the result as a rough estimate.
Converting grams to metres requires density plus diameter. The tool uses standard densities for PLA/PETG/ABS etc, and lets you enter a custom density if you have a manufacturer spec.
Percent margin scales with print size (good default). Fixed grams is useful for small prints where you always want the same buffer for purges/priming.
No. All calculations run locally in your browser using vanilla JavaScript. No tracking, no external calls.