Calculators for measurement and quality work
Each tool follows the published standard, shows its working, explains the method with a worked example, and prints a report you can attach to your records. Everything runs in your browser.
Process capability: Cp, Cpk, Pp, Ppk
Paste your measurements: capability indices with confidence intervals, expected ppm, a normality test, a histogram and an X̄-R or I-MR control chart.
Measurement uncertainty budget
Type A and Type B sources, sensitivity coefficients, effective degrees of freedom, coverage factor and a printable budget, following the GUM and EA-4/02.