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Result
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Sigma conversion depends on convention. This tool shows the selected shift explicitly instead of silently assuming it.
How to use this calculator
What to enter
Enter or select the following as requested: DPMO; Sigma shift convention. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The sigma level is estimated from defects per million opportunities (DPMO) using the selected shift convention. Compare results only when defect-opportunity definitions and sigma conventions are consistent.
When to use it
Use this to analyze process quality or plan a quality-improvement study. Verify data collection and statistical assumptions before changing a process or reporting formal capability results.