AQL Sampling Calculator
Calculate sample size and acceptance limits based on the ANSI/ASQ Z1.4 AQL standard.
Sample Size: 0 units
Critical
Accept: 0
Reject: 0
Major
Accept: 0
Reject: 0
Minor
Accept: 0
Reject: 0
How to Use the AQL Sampling Calculator
- Select the total shipment quantity (lot size)
- Select the inspection level (commonly General Level II)
- Select the AQL limits for critical, major, and minor defects (default values: Not Allowed, 2.5, and 4.0)
How to Read the AQL Sampling Tables
The AQL tables show how sample size and acceptance limits are determined, and if the number of defects exceeds the acceptance limit, the shipment should be rejected.
- Locate the lot size and inspection level to find the sample size code letter (Table A – Left)
- Use the code letter to identify the sample size (Table B – Right)
- Check the AQL columns to find the acceptance (Ac) and rejection (Re) limits
Understanding AQL Sampling in Quality Inspections
AQL (Acceptable Quality Limit) sampling is a statistical method used to determine whether a production lot meets required quality standards. Instead of inspecting every unit, a sample is selected based on lot size and inspection level to ensure efficient and reliable inspection results.