Pp/Ppk (Performance)
Calculate Pp/Ppk (Performance) instantly with the exact formula and a worked example.
Pp/Ppk (Performance)
Upper spec limit (USL)
Lower spec limit (LSL)
Process mean
Overall standard deviation (s)
Ppk
1.1111
Pp
1.333
PPU
1.111
PPL
1.556
Expected defects
430.6ppm
Process assessment
Marginally capable (1.00–1.33)
More about: Pp/Ppk (Performance)
What it calculates
The “Pp/Ppk (Performance)” calculator computes Ppk from 4 parameters: upper spec limit (usl), lower spec limit (lsl), process mean, overall standard deviation (s).
A handy everyday calculator for daily tasks.
Example calculation
With parameters Upper spec limit (USL) = 10.6, Lower spec limit (LSL) = 9.4, Process mean = 10.1, Overall standard deviation (s) = 0.15 the result is 1.11 (Pp/Ppk use overall σ, Cp/Cpk use within-subgroup σ).
How to use
- Enter upper spec limit (usl), lower spec limit (lsl), process mean and overall standard deviation (s) — each field above is adjustable with a slider.
- Ppk is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Pp/Ppk (Performance) calculated?
The Pp/Ppk (Performance) calculator computes Ppk from upper spec limit (usl), lower spec limit (lsl), process mean, overall standard deviation (s). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Pp/Ppk (Performance) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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