Free Tools

Lean Six Sigma calculators

Fast, free calculators for the everyday Lean Six Sigma math. No login required.

Free Process Health Score
Answer 10 questions, get a maturity score and three things to fix first.
DPMO & Sigma Level Calculator
Convert defects into DPMO, process yield, and a sigma level.
Process Capability (Cp / Cpk)
Measure how well a process fits its specification limits.
Cost of Poor Quality (COPQ)
Put a dollar figure on the cost of your defects.
Improvement ROI
Estimate the return and payback on an improvement project.