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3D Printing vs Plastic Injection Molding: Which Is Cheaper When?

For low volumes, 3D printing is often cheaper than injection molding because no mold is needed. Comparing batches of 300–1500 units, MJF is often more economical than molding; cost benefits can also be achieved for small batches of 50–150 units.

Netsheipas engineers · updated 2026-10-02 · 1 min read

Where the cost differs

Injection molding has a high upfront mold cost and a low unit cost; 3D printing has zero upfront cost and a more constant unit cost. So up to a certain quantity 3D production is cheaper, and above it – molding.

What determines the break-even point

  • Part size – large parts are more expensive in 3D production.
  • Geometric complexity – a complex shape needs an expensive mold, while for 3D production it makes no difference.
  • Likelihood of changes – every design change in molding may require a new mold.

Other advantages of 3D production

  • First parts in days, not weeks.
  • The design can be changed between batches.
  • No inventory needed – parts are made on demand.

How to evaluate

Upload your model and select the quantity – the calculator will show the unit price. Above 100 units, we will prepare a custom quote.

FAQ

Questions and answers

From what quantity is molding worth it?

It depends on the part. In our experience, MJF is often more economical up to several hundred or a thousand units. We can prepare a quote for both methods so you can compare.