Injection Molding calculator

Mold Trial Sample Size Calculator

Estimate mold trial sample size from lots, runs, and samples per run. Lots, runs per lot, and samples per run roll up to a sample count and inspection hours.

What this calculator does

  • Estimate mold trial sample size from lots, runs, and samples per run.
  • Use it when mold trial sample size in injection molding is being scheduled and QA needs to know how many samples are coming.
  • Turns mold trial sample size population, mold trial sample size sample rate, minimum mold trial sample size sample size into a total samples for mold trial sample size in injection molding.

Formula used

  • Calculated mold trial sample size sample = mold trial sample size population × mold trial sample size sample rate
  • Required mold trial sample size sample size = max(calculated sample, minimum mold trial sample size sample size)

Inputs explained

  • Mold trial sample size population: Enter the lot, shipment, installed base, inspection population, or production count in scope.
  • Mold trial sample size sample rate: Use the inspection plan, audit plan, control plan, regulatory sampling rate, or risk-based sampling level.
  • Minimum mold trial sample size sample size: Enter the minimum sample count required by the customer, standard, control plan, or internal policy.

How to use the result

  • Use it when mold trial sample size in injection molding is being scheduled and QA capacity matters.
  • Re-test rates, hold time, and lab queue time are not modeled.

Common questions

  • Why use this mold trial sample size tool for injection molding? Estimate mold trial sample size from lots, runs, and samples per run. You get a total samples you can defend before quoting, scheduling, or sign-off.
  • Which assumptions drive the total samples? mold trial sample size population, mold trial sample size sample rate, minimum mold trial sample size sample size usually move the total samples most. Pull from measured injection molding runs, supplier data, and recent quotes rather than memory.
  • How should I act on the output? Use the inspection hours to staff QA for the upcoming injection molding window.
  • What should I double-check before acting? Validate the sample plan against the customer or regulatory spec; under-sampling can void release.

Last reviewed 2026-05-12.