AQL sample size calculator

ANSI/ASQ Z1.4 single sampling (normal inspection). Enter lot size, inspection level, and AQL to get sample size and accept/reject numbers.

Your inputs

Total quantity in the lot or order being inspected.

Level II is typical for consumer goods; III is stricter (larger sample).

Common major defect AQL: 2.5; minor: 4.0. Critical often uses 0 or separate plan.

Sampling plan

Sample size (n) —
Code letter —
Ac / Re —
AQL used —
Level —
Lot size band —

Enter values on the left to see your plan.

For reference only. CloudSpects inspections follow agreed scope and defect classification; contact us for critical defects or special sampling levels (S-1–S-4).

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