A simple tool for people who 3D print.
Filament Calculator was built around a practical question: how much filament is actually left on the spool, and how long might it last?
What it does
The calculator estimates remaining filament from spool weights, then shows grams, meters, feet and inches, percentage remaining, estimated value and printing time.
The tracker goes one step further by letting you save multiple spools on the device you are using. You can search, filter, update weights, see collection totals, mark low spools automatically, and export a backup of your inventory.
What it does not try to replace
3D-printing slicers are still the right place to estimate what a specific model will use. Filament Calculator is about the inventory you already have on the shelf, not slicing a model.
Privacy by design
No account is required. Calculator math runs in the browser, and saved inventory is stored in the browser on that device. Use the export function when you want a portable backup.