DPMO Calculator
Defects per million opportunities, with defects per unit and yield.
Results
DPMO
2000.0
Percentage
1.6000
%
Quality
99.80000
%
What this tool does
DPMO normalises quality across products of different complexity: a part with eight inspection points and one with eighty cannot be compared on defect count alone. Define the opportunities per unit consistently or the number means nothing.
Formula
DPMO = defects ÷ (units × opportunities) × 1 000 000
Variables
| Symbol | Meaning | Unit |
|---|---|---|
d | Defects | — |
u | Total units produced | — |
o | Opportunities per unit | — |
DP | DPMO | — |
DU | Percentage | % |
YL | Quality | % |
Worked example
- Defects24
- Total units produced1500
- Opportunities per unit8
- DPMO2000.0
- Percentage1.6000 %
- Quality99.80000 %
Limitations
- For work that must comply with a standard or be signed off, check the result against the applicable code and have it reviewed by a qualified engineer.
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.