What HHI score indicates a competitive market?

An HHI below 1,500 generally suggests a competitive market, while scores between 1,500 and 2,500 indicate moderate concentration, and scores above 2,500 reflect high concentration.

Can the HHI Calculator handle more than two firms?

Yes, the tool accepts market share inputs for any number of firms; the HHI is calculated by squaring each share and summing the results.

Is the HHI score affected by the total number of firms in the market?

Yes, adding more firms with small shares typically lowers the HHI, increasing the appearance of competition, while fewer dominant firms raise the score.

Does the tool classify the market for me after calculating the HHI?

No, the calculator provides the numeric score; users must interpret the result using standard HHI thresholds or consult additional market analysis.

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HHI Calculator (Herfindahl-Hirschman Index Calculator)

Provided byOmni Calculatoromnicalculator.com

The Herfindahl-Hirschman Index calculator (HHI calculator) is an easy tool for measuring market concentration and det...

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Screenshot of HHI Calculator (Herfindahl-Hirschman Index Calculator) on Omni Calculator — omnicalculator.comOpen the live tool →

About this tool

What HHI Calculator (Herfindahl-Hirschman Index Calculator) does

The HHI Calculator on Omni Calculator lets users compute the Herfindahl-Hirschman Index, a standard measure of market concentration. By entering the market share percentages for firms in an industry, the tool sums the squares of those shares to produce a score between 0 and 10,000. This single number helps assess how competitive a market is, with higher values indicating greater concentration and less competition. The calculator is designed for quick, straightforward use without requiring manual math or statistical software.

Step by step

How to use the Omni Calculator HHI Calculator (Herfindahl-Hirschman Index Calculator)

1
Open the HHI Calculator on Omni Calculator
2
Enter the market share percentage for each firm in the industry
3
The tool automatically sums the squares of the shares and displays the HHI score
4
Review the resulting score to gauge the level of market concentration
5
Compare the score against standard HHI thresholds to determine competitiveness

Is it right for you

Best for

Analysts, students, or business professionals who need to quickly assess market concentration without manual calculation or statistical software.

Limitations

Scores are estimates based on the market share data entered
Does not provide a detailed breakdown of individual firm contributions to the total score
Requires accurate market share inputs; incorrect percentages will yield unreliable results

Questions

HHI Calculator (Herfindahl-Hirschman Index Calculator) FAQ

What HHI score indicates a competitive market?: An HHI below 1,500 generally suggests a competitive market, while scores between 1,500 and 2,500 indicate moderate concentration, and scores above 2,500 reflect high concentration.
Can the HHI Calculator handle more than two firms?: Yes, the tool accepts market share inputs for any number of firms; the HHI is calculated by squaring each share and summing the results.
Is the HHI score affected by the total number of firms in the market?: Yes, adding more firms with small shares typically lowers the HHI, increasing the appearance of competition, while fewer dominant firms raise the score.
Does the tool classify the market for me after calculating the HHI?: No, the calculator provides the numeric score; users must interpret the result using standard HHI thresholds or consult additional market analysis.

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