Quality & Six Sigma

DPMO Calculator

Calculate Defects Per Million Opportunities to measure your process quality and see exactly where it sits on the Six Sigma scale.

Formula
DPMO = (D ÷ (U × O)) × 1,000,000

Enter your values

Total defects found in the sample Please enter a valid number of defects (0 or more).
Total units inspected or produced Please enter a valid number of units (greater than 0).
Number of ways each unit can have a defect Please enter a valid number of opportunities (greater than 0).
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Ready to calculate

Enter your values on the left and press Calculate to see your DPMO result.

Your DPMO result
defects per million opportunities
Approximate Sigma Level
What this means

How it works

Understanding DPMO

D

Defects

The total number of defects found across all units in your sample. A defect is any instance where a unit fails to meet a specification.

U

Units

The total number of items, products, or transactions inspected or produced during the measurement period.

O

Opportunities

The number of ways each unit could potentially have a defect. A form with 10 fields has 10 opportunities for error per unit.