About

FilamentMonkey is a small affiliate site that surfaces 3D printing filament deals on Amazon US, ranked by price per kilogram.

Why price per kg

Filament is sold in wildly different spool weights: 250 g, 500 g, 1 kg, 2 kg, even 3 kg multi-packs. A "cheap" 500 g spool can easily cost more per kilogram than a "pricey" 1 kg spool. Sorting by total price is misleading; sorting by price per kg tells you the real deal.

Every card here shows the spool price and the computed price per kg side-by-side. You should never have to do the math.

What we cover

• Amazon US only (for now). Amazon Canada is on the roadmap.
• PLA, PETG, ABS, TPU, silk, matte, carbon-fiber blends, and other filament types as they appear in the catalog.
• Spool sizes from 250 g to 3 kg+.

What we do not do

• We do not scrape Amazon. Listings are added manually or via the Amazon Product Advertising API once we qualify.
• We do not run paid placements.
• We do not store your personal data (see privacy).

Questions or corrections

If you spot an outdated listing, please use the Report link on the deal card. For everything else, the contact form goes straight to our inbox.

Last updated: 2026-05-31