Free tool
AQL inspection calculator
How many units to inspect and how many defects to accept, per ISO 2859-1 / ANSI Z1.4, then a pass or fail from what the inspector found.
AQL sampling calculator
How many units to check in a pre-shipment inspection, and how many defects the order can have and still pass.
Total units in the order or shipment.
The usual level for pre-shipment inspections.
Faults a customer would return. 2.5 is usual; lower is stricter.
Small flaws that don't stop a sale. 4.0 is usual.
Critical defects
0 allowed (common practice)
Unsafe, illegal or labelling faults. One critical defect fails the lot.
Your sampling plan
Units to inspect
125
Code letter
K
- Critical0 allowed
- Accept up to 0, reject at 1
- MajorAQL 2.5
- Accept up to 7, reject at 8
- MinorAQL 4.0
- Accept up to 10, reject at 11
Pull 125 units at random. The lot passes if it has at most 7 major and 10 minor defects, and no critical defects.
Inspection result
Enter the defects your inspector found. Blank counts as 0.
In 125 units · reject at 1
In 125 units · reject at 8
In 125 units · reject at 11
Based on ISO 2859-1 / ANSI Z1.4 single sampling, normal inspection. Your inspection agreement decides the final plan.
Tell us what you want made.
Share your RFQ — under NDA — and we'll come back with how we'd source it, what it takes and what it costs.
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