Injection Molding calculator

Defect Rate by Cavity Calculator

Calculate defect rate by cavity from rejected cavity parts and total cavity output. Two counts and a target give you a rate plus how far you are from where you need to be.

What this calculator does

  • Calculate defect rate by cavity from rejected cavity parts and total cavity output.
  • Use it when defect rate by cavity in injection molding needs a clean rate and gap-to-target you can put on a tier board.
  • Turns defect rate by cavity count, total defect rate by cavity population, target defect rate by cavity rate into a rate for defect rate by cavity in injection molding.

Formula used

  • Defect rate by cavity rate = defect rate by cavity count ÷ total defect rate by cavity population × 100
  • Defect rate by cavity gap to target = defect rate by cavity rate - target defect rate by cavity rate

Inputs explained

  • Defect rate by cavity count: Enter the number of defects, passes, claims, shortages, conforming units, or events being measured.
  • Total defect rate by cavity population: Use the matching inspected, produced, tested, shipped, sampled, or installed population for the same period.
  • Target defect rate by cavity rate: Enter the KPI, specification, contract target, quality target, or internal control limit.

How to use the result

  • Use it when defect rate by cavity in injection molding is being reviewed against a KPI.
  • Trend matters more than a single snapshot; pull the result for the last several periods before you act.

Common questions

  • How does this defect rate by cavity calculator help my injection molding team? Calculate defect rate by cavity from rejected cavity parts and total cavity output. You get a rate you can defend before quoting, scheduling, or sign-off.
  • Where do I get the inputs for this injection molding calculator? defect rate by cavity count, total defect rate by cavity population, target defect rate by cavity rate usually move the rate most. Pull from measured injection molding runs, supplier data, and recent quotes rather than memory.
  • How should I act on the output? Use the gap to target to prioritize the next injection molding kaizen or corrective action.
  • What should I double-check before acting? Confirm the counts came from the same time window and the same scope; mismatched scope is the most common error.

Last reviewed 2026-05-12.