CNC Machining worked example

CNC Utilization at 54% target cnc utilization: a worked example

This worked example runs the cnc utilization numbers for a tougher week than the baseline: 54% target cnc utilization instead of the typical 75%. Calculate CNC utilization from productive machine time and available machine time for a shift, cell, or reporting period.

The inputs for this scenario

  • productive CNC machine time: 118 hr (held at the documented default)
  • available CNC machine time: 160 hr (held at the documented default)
  • target CNC utilization: 54 % (the input this scenario stresses; the baseline uses 75)

Working through the calculation

  • The calculation starts from the formula this tool documents: CNC utilization = productive CNC machine time ÷ available CNC machine time × 100.
  • CNC utilization works out to 73.75 % utilized at these inputs, and this is the headline figure for the scenario.
  • utilization gap to target works out to -19.75 points at these inputs.
  • productive CNC machine time works out to 118 count at these inputs.
  • available CNC machine time works out to 160 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target cnc utilization sits at 75% and the headline result is 73.75 % utilized, this scenario lands almost exactly on the baseline at 73.75 % utilized.
  • Use it for capacity planning, before justifying a new machine purchase, and to track whether scheduling or setup improvements are increasing spindle time. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • CNC utilization: 73.75 % utilized (headline result)
  • utilization gap to target: -19.75 points
  • productive CNC machine time: 118 count
  • available CNC machine time: 160 count

Run it with your numbers

  • To rerun this with your own numbers, open the live CNC Utilization calculator, set target cnc utilization to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.