3D Printing Cost and Filament Calculator

How to use

1. 1Pick how you want to enter the filament: by weight in grams, by length in metres, or by model volume in cubic centimetres, then type the number from your slicer.
2. 2Choose the filament diameter and material. The density auto-fills from the material and stays editable for an exact spool.
3. 3Add a waste allowance for purge, supports, and failed layers so the spool usage is realistic.
4. 4Enter your spool price and net weight to cost the material, then optionally switch on electricity and labor for a full per-print cost.
5. 5Set a markup percentage to get a suggested selling price, and copy the estimate when you are done.

About this tool

3D Printing Cost and Filament Calculator answers the two questions every FDM maker asks about a job: how much filament it uses and what it costs. It works from whichever number a slicer such as Cura or PrusaSlicer gives you. Most slicers print the used filament in grams, some report the length in metres, and when you only know the solid model size you can enter the volume in cubic centimetres; the tool accepts any of the three and fills in the other two. Filament is a strand of plastic with a known diameter, usually 1.75 mm but also 2.85 mm or 3.0 mm on some machines, made of a material with a known density, so the geometry is exact: the cross-section area is pi times the radius squared, the volume is that area times the length, and the weight is the volume times the density. From any one of weight, length, or volume the calculator derives the rest, using a density default for your material that you can override for an exact spool. Common values are built in, including PLA at about 1.24, PETG at about 1.27, ABS at about 1.04, TPU, nylon, polycarbonate, and filled PLA blends. Cost is then assembled from parts you can actually price. Material cost comes from the spool: the price divided by the spool net weight gives a cost per gram, multiplied by the grams the print consumes. A waste allowance adds the purge, skirt, supports, and the occasional failed first layer, because the spool is used up whether or not the plastic ends up in the part. You can optionally add electricity, computed from the printer's average power draw, the print time, and your tariff per kilowatt hour, and labor for your own setup and post-processing time. The subtotal of material, electricity, and labor is the true cost to make the part, and an optional markup percentage turns that into a suggested selling price for anyone printing on commission or for a shop. Every figure is copyable as a short estimate. The math is plain and transparent, and the calculation runs entirely in your browser, so no model file is uploaded and nothing you type is sent anywhere.

Free to use. Works in your browser. No signup, no login.