Free Filament Cost Calculator

Calculate material cost in seconds using spool price, spool weight, and print weight. Add waste percentage and failed print allowance to model real-world production. This calculator is designed for hobby sellers, Etsy shops, and print farms that need quick quoting without spreadsheets.

Material cost$0.00

Cost per gram$0.00

Adjusted print cost$0.00

ModeLive

Why this matters

Many makers undercharge because they only count raw filament weight and ignore failed starts, purge waste, and support material overhead. A small 8-12% waste factor can materially change your true cost, especially on products sold in volume. When you base prices on adjusted cost instead of nominal weight alone, your margin becomes predictable and you are less likely to lose money on repeat orders.

For stronger results, pair this with the print pricing calculator to include labor, electricity, and marketplace fees. Material is just one part of true cost. Filamath helps you connect all parts into one practical pricing workflow.

FAQ

What is a good waste percentage?

Most FDM workflows start around 5-12%. Complex geometry or frequent color swaps can push this higher.

Should I include failed prints?

Yes. Add expected failure grams to avoid hidden losses.