DPMO & Sigma Level
Convert defect counts into DPU, DPO, DPMO and an explicitly selected sigma convention.
DPMO & Sigma Level
Browser-only calculations · No input data saved
Worked example results
- DPU
- 0.12
- DPO
- 0.024
- DPMO
- 24,000
- Opportunity yield (%)
- 97.6
- Sigma level (selected shift)
- 3.477368
Rounded for display only. Export includes the inputs, results, method and assumptions. Refreshing or leaving the tool clears entered data.
How to use DPMO & Sigma Level
- Load the worked example to see the required input format.
- Convert defect counts into DPU, DPO, DPMO and an explicitly selected sigma convention. Use consistent units, periods and definitions.
- Select Calculate, review the assumptions and export the result for your project evidence.
Formula and method
DPU = defects / units; DPO = defects / (units × opportunities); DPMO = DPO × 1,000,000; sigma = Φ⁻¹(1 − DPO) + shift.
Interpretation and assumptions
Defects are not the same as defective units. Opportunity yield is not unit first-pass yield. Sigma is inverse normal of 1 − DPO plus the selected shift; zero observed defects does not establish infinite true capability. Define opportunities consistently.
Results support professional judgement. They are not a certification of process stability, a financial commitment or a substitute for study design.
Frequently asked questions
How do I use the dpmo & sigma level?
Convert defect counts into DPU, DPO, DPMO and an explicitly selected sigma convention. Load the example first, then replace all inputs with consistent process data and select Calculate. DPU = defects / units; DPO = defects / (units × opportunities); DPMO = DPO × 1,000,000; sigma = Φ⁻¹(1 − DPO) + shift.
What assumptions matter for dpmo & sigma level?
Defects are not the same as defective units. Opportunity yield is not unit first-pass yield. Sigma is inverse normal of 1 − DPO plus the selected shift; zero observed defects does not establish infinite true capability. Define opportunities consistently.
Are my calculator inputs saved or sent to a server?
These native calculations run in this browser tab. Inputs are not sent to a server or saved by this calculator. Download the result if you need a record; leaving or refreshing clears the form.