Injection Molding worked example

Injection Machine Hour Rate with total annual machine costs of 450,000 $/year: a worked example

Push total annual machine costs up to 450,000 $/year and the picture changes. This example computes every intermediate figure at that operating point. Use this when building part cost quotes, comparing press economics across machine sizes, or allocating machine costs to different product lines.

The inputs for this scenario

  • Total annual machine costs: 450,000 $/year (raised for this scenario; the documented default is 180,000)
  • Available production hours per year: 6,000 hrs/year (unchanged)
  • Overhead allocation multiplier: 1.25 x (unchanged)

Working through the calculation

  • Applying the documented formula (Machine hour rate = (Annual costs / Available hours) x Overhead multiplier) to the inputs above produces each figure below.
  • At this operating point the engine returns 3,375,000,000 $/hr for result, the number this scenario is built around.
  • At this operating point the engine returns 3,375,000,000 value for base rate (costs / hours).
  • At this operating point the engine returns 1 x for multiplier.
  • At this operating point the engine returns 2,700,000,000 value for factor a x b.

How this compares with the baseline

  • Against the tool's baseline example, where total annual machine costs sits at 180,000 $/year and the headline result is 1,350,000,000 $/hr, this scenario comes in 150% above the baseline at 3,375,000,000 $/hr.
  • It divides total annual machine costs by available production hours and applies an overhead multiplier to give a fully burdened press cost per hour. 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

  • Result: 3,375,000,000 $/hr (headline result)
  • Base rate (costs / hours): 3,375,000,000 value
  • Multiplier: 1 x
  • Factor A x B: 2,700,000,000 value

Run it with your numbers

  • Every input above is editable in the live Injection Machine Hour Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.