Injection Molding worked example

Molded Part Cost with material cost per part of 0.24 $/part: a worked example

Push material cost per part up to 0.24 $/part and the picture changes. This example computes every intermediate figure at that operating point. Use this for part pricing, customer quotations, make-vs-buy decisions, or comparing cost impact of design changes (wall thickness, material grade, cavitation).

The inputs for this scenario

  • Material cost per part: 0.24 $/part (raised for this scenario; the documented default is 0.1)
  • Machine/conversion cost per part: 0.04 $/part (unchanged)
  • Amortized tooling cost per part: 0.02 $/part (unchanged)

Working through the calculation

  • Applying the documented formula (Total part cost = Material + Conversion + Tooling (per part)) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.3 $ for total, the number this scenario is built around.
  • At this operating point the engine returns 0.24 $ for element 1.
  • At this operating point the engine returns 0.04 $ for element 2.
  • At this operating point the engine returns 0.02 $ for element 3 + 4.

How this compares with the baseline

  • Against the tool's baseline example, where material cost per part sits at 0.1 $/part and the headline result is 0.15 $, this scenario comes in 94.16% above the baseline at 0.3 $.
  • It adds material cost per part, machine conversion cost per part, and amortized tooling cost per part into a single manufacturing cost per part. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total: 0.3 $ (headline result)
  • Element 1: 0.24 $
  • Element 2: 0.04 $
  • Element 3 + 4: 0.02 $

Run it with your numbers

  • Every input above is editable in the live Molded Part Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.