CNC Machining calculator

Fixture Amortization Calculator

Use this calculator when a fixture cost must be converted into a cost per part for quoting or capital approval. It helps show whether dedicated workholding is justified by labor savings, cycle-time improvement, quality control, or repeat order volume.

What this calculator does

  • Allocate fixture, soft jaw, pallet, vise, or workholding investment across the expected number of machined parts.
  • allocating workholding cost to a CNC quote, fixture ROI review, or repeat-production program
  • The result is fixture cost allocated to each part or quote unit.

Formula used

  • Fixture Amortization = fixture or workholding investment ÷ expected production quantity × utilization or scrap factor
  • Keep numerator and denominator on the same job, setup, tool, or production basis.

Inputs explained

  • fixture or workholding investment: Use the measured numerator from the same job, batch, cutter, fixture, or machining scenario.
  • expected production quantity: Use the matching denominator from the same operation, lot size, tool life record, or setup plan.
  • utilization or scrap factor: Use 1.0 when no conversion or adjustment is needed; otherwise use the documented shop factor.

How to use the result

  • Use it when deciding between general-purpose workholding and dedicated fixtures.
  • Treat the result as a planning estimate until it is verified against the actual CNC program, machine limits, toolholder rigidity, coolant delivery, workholding, material condition, inspection data, and shop-floor trial results.

Common questions

  • What is the fixture amortization calculator for? It calculates fixture amortization for a specific CNC setup or costing question.
  • What information should I enter? Use fixture or workholding investment, expected production quantity, and utilization or scrap factor from the same routing, quote, tool record, or production run.
  • What does the result tell me? The result is fixture cost allocated to each part or quote unit.
  • When is the result only an estimate? Treat the result as a planning estimate until it is verified against the actual CNC program, machine limits, toolholder rigidity, coolant delivery, workholding, material condition, inspection data, and shop-floor trial results.

Last reviewed 2026-05-12.