CNC Machining worked example

Machining Cost Per Part with quoted or produced part quantity of 630 parts: a worked example

What does the result look like when quoted or produced part quantity reaches 630 parts? The full calculation is worked below with real intermediate numbers. quoting machined parts, checking routing standards, or comparing lot sizes and process alternatives

The inputs for this scenario

  • quoted or produced part quantity: 630 parts (raised for this scenario; the documented default is 250)
  • variable machining cost per part: 18.5 $ / part (unchanged)
  • setup, programming, and fixture cost: 650 $ (unchanged)
  • inspection, handling, and overhead adder: 275 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total machining batch cost = quoted or produced part quantity × variable machining cost per part + setup, programming, and fixture cost + inspection, handling, and overhead adder) to the inputs above produces each figure below.
  • At this operating point the engine returns 12,580 $ / part for total machining batch cost, the number this scenario is built around.
  • At this operating point the engine returns 19.97 $ / piece for machining cost per part.
  • At this operating point the engine returns 11,655 $ for variable machining run cost.
  • At this operating point the engine returns 925 $ for setup, inspection, and overhead adders.

How this compares with the baseline

  • Against the tool's baseline example, where quoted or produced part quantity sits at 250 parts and the headline result is 5,550 $ / part, this scenario comes in 127% above the baseline at 12,580 $ / part.
  • A figure at this level is achievable when quoted or produced part quantity is genuinely sustained, not just peaked for a shift. It assumes a single variable cost per part and lumped fixed costs, so it does not model scrap, rework, or learning-curve speedups across a long run.

Results at a glance

  • total machining batch cost: 12,580 $ / part (headline result)
  • machining cost per part: 19.97 $ / piece
  • variable machining run cost: 11,655 $
  • setup, inspection, and overhead adders: 925 $

Run it with your numbers

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

Last reviewed 2026-05-12.