1-DPM (Defects Per Million) Calculator

Here you can calculate the by counting the number of Defects in a sample.
Note that this calculator "rounds up" - to the nearest.

Enter the number of Defects Observed:
Enter the size of the sample:
(how many total results were examined)


Here are your Defects Per Million:
Here is your Sigma-Metric:

Note also that if you know your Defect/Error rate as a percentage, you can enter it here with the sample size of 100 (i.e. a defect rate of 2% would be entered "2" in the defects observed, and "100" in the size of the sample).

2-Process Design Calculator

Here you can calculate your Sigma-metric by analysis of variance measurements.
Enter the Quality Requirement
or Tolerance Limit (in %):
(If you don't know, look it up below):
Observed Bias (as a %):
(If you don't know, start with 0)
Observed CV (as a %):
(If you don't know, find out)

3-QC Design Calculator (Critical Systematic Error)

Here you can calculate the size of the error your QC must detect.
Enter the Quality Requirement
or Tolerance Limit (in %):
(If you don't know, look it up below)
Observed Bias (as a %):
(If you don't know, start with 0)
Observed CV (as a %):
(If you don't know, find out)

Limitations

These Javascript calculators are for demonstration purposes only. In particular, if you enter nonsensical numbers, they will return nonsense. Entering 0 for Defects Observed, Sample Size, Quality Required, Observed CV will give you useless answers. More robust Six Sigma calculators are available upon request.

 

NOTE: This page can be seen with the browsers which are supporting  Javascript

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