Quality & Metrology calculator

AQL Sample Size Calculator

Estimate aql sample size for quality & metrology using production inputs, allowances, and safe planning assumptions. Lots, runs per lot, and samples per run roll up to a sample count and inspection hours.

What this calculator does

  • Estimate aql sample size for quality & metrology using production inputs, allowances, and safe planning assumptions.
  • Use it when aql sample size in quality and metrology is being scheduled and QA needs to know how many samples are coming.
  • Turns aql sample size population, aql sample size sample rate, minimum aql sample size sample size into a total samples for aql sample size in quality and metrology.

Formula used

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

Inputs explained

  • Aql sample size population: Enter the lot, shipment, installed base, inspection population, or production count in scope.
  • Aql sample size sample rate: Use the inspection plan, audit plan, control plan, regulatory sampling rate, or risk-based sampling level.
  • Minimum aql 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 aql sample size in quality and metrology is being scheduled and QA capacity matters.
  • Re-test rates, hold time, and lab queue time are not modeled.

Common questions

  • How does this aql sample size calculator help my quality and metrology team? Estimate aql sample size for quality & metrology using production inputs, allowances, and safe planning assumptions. You get a total samples you can defend before quoting, scheduling, or sign-off.
  • Where do I get the inputs for this quality and metrology calculator? aql sample size population, aql sample size sample rate, minimum aql sample size sample size usually move the total samples most. Pull from measured quality and metrology 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 quality and metrology 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.