Interactive quality tool / process capability

Cpk,
honestly.

Cp, Cpk, Pp and Ppk with a stability check, a normality test, non-normal methods and a lower confidence bound. It runs in your browser: your measurements never leave your computer.

Important boundaryThis is a free calculator, not a controlled record. Nothing you paste is sent, stored on a server or shared.

01 / paste the measurementsPaste from a spreadsheet: one value per line, or one subgroup per line (5 parts across)

Lower specUpper specNatural bound (e.g. 0 for runout)Required index

Your paste is kept in this browser only, so you can come back to it. Clear it on a shared computer.

Paste at least 20 measurements and at least one specification limit to see the report. Free calculator — not a controlled record.

Need it on record, approved by a second person and tied to the gauge's MSA? Start NormaQMS.

Cpk,honestly.

Cpk,
honestly.