Filament Cost Calculator

Find the exact material cost of a print from your spool price and the part's weight. Your slicer reports the gram weight of a sliced model — plug it in below.

How this is calculated

Cost per gram is simply spool price ÷ spool net weight. The material cost of a print is that rate multiplied by the print's weight, plus a waste allowance for skirt/purge, support material, and the occasional failed print:

cost = (spool price ÷ spool grams) × print grams × (1 + waste% ÷ 100)

Use the net filament weight, not the gross weight including the spool — a "1 kg" spool means 1000 g of plastic. A typical empty plastic spool adds 180–250 g that you should not count.

Typical spool weights