Free Resource
The SPC & Quality Engineering Formula Sheet
Every formula you reach for during a capability study, a control chart review or the ASQ CQE / Six Sigma Green Belt exam — on a few printable pages, with the constants table included.
- Process capability: Cp, Cpk, Pp, Ppk, PPM ↔ sigma level
- Control limits: X̄-R, X̄-S, I-MR, p, np, c, u charts
- Control chart constants: d₂, A₂, D₃, D₄, A₃, B₃, B₄, c₄ (n = 2–13)
- Gage R&R: EV, AV, PV, %GRR, ndc with AIAG acceptance criteria
- Advanced: EWMA and CUSUM formulas with parameter guidance
- One-line 'when to use this' note on every formula
Get the free PDF
Practice with real calculators
Memorizing formulas is half the exam — the other half is knowing what the numbers mean. Every formula on the sheet has a matching free calculator here, so you can check your hand calculations instantly:
Cpk Calculator →X̄-R Control Chart →Gage R&R (MSA) →Process Sigma Level →Sample Size Calculator →Constants Lookup Table →
Studying for the CQE? The SPC Field Manual ($19) covers the SPC body of knowledge with worked examples and self-check questions in every chapter.