Craft Pricing Tools

Filament Cost Calculator

Convert a spool price into the plastic cost of one part, including a failure allowance.

Display only — amounts are not converted between currencies.

Spool and usage
$
g
g
%

Filament cost for this print

$3.24

Filament without waste
$3.00
Waste allowance
$0.24
Cost per gram
$0.03

Cost breakdown

Filament cost$3.00
Waste cost$0.24

Printed · Craft Pricing Tools · CraftPricingTools.com

Filament cost for this print

$3.24

This is the plastic-only view: spool price, spool weight, grams used and an optional waste percentage.

It also shows cost per gram so you can compare spools that are priced differently.

How this calculator works

How we calculate this

  1. Cost per gram = spool price / spool grams
  2. Print filament cost = grams used × cost per gram
  3. With waste = print filament cost × (1 + waste %)

Example

Example: $25/kg vs a 750 g specialty spool

A $25 kilogram spool is $0.025/g. A $29 750 g spool is about $0.039/g. A 120 g part is $3.00 vs about $4.64 before waste.

  • Compare cost per gram, not only the sticker on the box.
  • Add waste if you reprint often with that filament.

How much should I charge?

Filament cost is not a selling price. Feed this number into the 3D Printing Cost or Price calculator.

Pricing tips

  • Weigh the spool if the labeled grams seem optimistic.
  • Include the empty-spool weight mistake: price is for net plastic if that is how you buy.

Common mistakes

  • Using list price after you bought the roll on sale — use what you paid.
  • Treating sample swatches as free on a customer job.

FAQ

How do I calculate filament cost for a print?

Divide spool price by spool weight in grams, then multiply by grams used. Add waste if failures are common.

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