About filamentcalcs.com

filamentcalcs.com is a small, independent site focused on practical calculators for 3D printing hobbyists. It's run by a single person who prints on a Bambu Lab P1S, got tired of pulling up spreadsheets every time a spool ran low, and decided to build the calculator they wished existed.

Every calculator here runs entirely in your browser. No account is required, and no data is sent to a server. URLs include your inputs so you can bookmark a result or share it in a Reddit thread or Discord channel.

Formulas are based on community references (Prusa documentation, Bambu Lab wiki, common maker forum threads) plus real-world testing. Where estimates have wide error bars, the tool says so. Print time is the main example.

This site carries Google AdSense to offset hosting costs and time. No affiliate links, no sponsored placements, no data collection beyond standard Google Analytics.

Found a bug, disagree with a formula, or have an idea for a calculator? Use the contact page.