First Pass Yield Calculator
Share of units that pass without rework, alongside the final yield.
Results
Quality
92.500
%
Quality
98.500
%
Percentage
1.500
%
What this tool does
Final yield counts anything that eventually ships; first pass yield counts only what was right the first time. The gap between the two is the hidden factory — the rework nobody plans for but everyone pays for.
Formula
FPY = good units à first ÷ units inputs × 100
Variables
| Symbol | Meaning | Unit |
|---|---|---|
inp | Total units produced | — |
rw | Quantity | — |
sc | Quantity | — |
FPY | Quality | % |
TY | Quality | % |
SR | Percentage | % |
Worked example
- Total units produced1000
- Quantity60
- Quantity15
- Quality92.500 %
- Quality98.500 %
- Percentage1.500 %
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- 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.