Free Tool
AQL Sample Size Calculator
Calculate the right sample size for quality inspections based on ISO 2859-1
ISO 2859-1 standard
All inspection levels
Instant results
Input Parameters
Results
Sample Code Letter
J
Sample Size
80
units to inspect
Accept if defects
≤ 10
Reject if defects
≥ 11
Batch range: 501-1200 units
Using inspection level II with 2.5% AQL
How to Use This Calculator
1
Enter Batch Size
Input the total number of units in your production batch or shipment.
2
Select Inspection Level
Level II is standard. Use Level III for stricter inspection or Level I for reduced.
3
Choose AQL Level
2.5% is common for general goods. Lower percentages mean stricter requirements.
Reference
Common AQL Levels
| AQL Level | Typical Use | Strictness |
|---|---|---|
| 0.65% | Critical defects, safety items | Very Strict |
| 1.0% | Major defects, high-value goods | Strict |
| 2.5% | Minor defects, general consumer goods | Standard |
| 4.0% | Minor cosmetic defects, low-cost items | Lenient |
Need Professional Inspection?
Our QC team can perform inspections at your supplier's factory.