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Diversity Ratio Calculator

Work out diversity ratio instantly with clear inputs, formula shown and shareable results.

About Diversity Ratio Calculator

Overall representation alone tells you little about progression. The leadership parity index — leadership representation divided by overall representation — shows whether a group advances at the same rate as everyone else. A value of 1.0 means parity; below 1.0 indicates a progression barrier.

Formulas

Representation

Representation % = Group headcount / Total headcount x 100

Parity index

Parity index = Leadership representation % / Overall representation %

Worked example

With the default values below, Diversity Ratio Calculator returns Overall representation of 30.00%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Headcount in the group
186
Total headcount
620
Group members in leadership roles
14
Total leadership roles
84

Results

Overall representation
30.00%
Representation in leadership
16.67%
Leadership parity index
0.556
Leadership gap in percentage points
-13.33%

Step by step

  1. 1Values used
  2. 2Representation
  3. 3Parity index
  4. 4Overall representation= 30.00
  5. 5Representation in leadership= 16.67
  6. 6Leadership parity index= 0.556
  7. 7Leadership gap in percentage points= -13.33

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why use a parity index rather than raw percentages?

Because raw leadership percentages are dominated by overall representation. The index isolates the progression effect from the pipeline effect.

What should be measured alongside it?

Hiring rate, promotion rate and attrition rate by group. Representation is a lagging outcome of those three flows.

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