Hose, Tubing & Fluid Conveyance Products calculator

Ferrule Inventory Usage Calculator

Calculate the ferrule or crimp collar quantity needed for a production run. Enter assemblies to build, ferrules per fitting end, and fitting ends per assembly. Add a scrap or trial allowance for setup and first-piece trials.

What this calculator does

  • Estimate ferrule or crimp collar quantity needed for a hose assembly production run from assemblies, ferrules per end, and ends per assembly.
  • Use it when calculating the ferrule order quantity for a hose assembly production job to avoid line shortages.
  • Estimates the ferrule or crimp collar quantity needed for a production run including a scrap and trial allowance.

Formula used

  • Theoretical ferrule count = assemblies x ferrules per end x fitting ends per assembly
  • Required ferrules with allowance = theoretical count / transfer efficiency

Inputs explained

  • Hose assemblies to produce: Total assemblies in this production run that require ferrules or crimp collars.
  • Ferrules per assembly end: Number of ferrules or crimp collars per fitting end. Typically 1, but may be 2 for some designs.
  • Fitting ends per assembly: Fitting ends on each assembly. A standard two-end hose has 2 ends.

How to use the result

  • Use it when ordering ferrules before a production run or checking whether inventory covers the job.
  • It estimates a single ferrule size per run. If the run mixes multiple ferrule sizes, calculate each size separately.

Common questions

  • What is the Ferrule Inventory Usage calculator for? It estimates the ferrule or crimp collar quantity needed for a hose assembly production run from assembly count, ferrules per end, and ends per assembly.
  • What numbers do I need before using it? You need the assembly count, ferrules per fitting end (usually 1), and fitting ends per assembly (usually 2 for a standard hose).
  • How should I use the result? Use the result to verify inventory on hand covers the run or to calculate the ferrule order quantity.
  • When is the result only an estimate? It is an estimate when mixed ferrule sizes, multi-end assemblies, or prototype trial quantities are not accounted for separately.

Last reviewed 2026-05-12.