What does a Gini coefficient of 0 mean?

A Gini coefficient of 0 means perfect equality — every individual has the same income or wealth. In practice no country achieves 0; most developed nations range from 0.25 to 0.40.

What does a Gini coefficient of 1 mean?

A Gini coefficient of 1 (or 100 on the 0–100 scale) means perfect inequality — one person holds all the income or wealth and everyone else has nothing. Real-world values rarely exceed 0.65.

What is the Lorenz curve?

The Lorenz curve plots the cumulative share of income (y-axis) held by the bottom x% of the population. A perfectly equal distribution lies along the 45-degree diagonal. The Gini coefficient equals twice the area between the diagonal and the Lorenz curve.

How many values do I need?

You need at least 2 values. More values produce a smoother Lorenz curve and a more representative Gini estimate. National statistics typically use thousands of household observations.

Can I use this for revenue concentration (not just income)?

Yes. The Gini coefficient applies to any non-negative distribution — customer revenue, product sales, land ownership, or any other resource. The interpretation is the same: closer to 0 means more even distribution.

Does the order of values matter?

No. The calculator sorts values automatically before computing. You can paste them in any order.

Gini Coefficient Calculator

Name: Gini Coefficient Calculator
Availability: InStock
Author: Nham Vu

Enter a list of income or wealth values to calculate the Gini coefficient and plot the Lorenz curve.

Income / Wealth Values

Enter values (one per line)

Load sample data

Lorenz Curve

Enter values and click Calculate to see the Lorenz curve.

Gini Coefficient Reference

Range	Inequality Level	Examples
0.00 – 0.25	Very Low	Nordic countries (~0.25–0.28)
0.25 – 0.35	Low	Germany (~0.31), France (~0.32)
0.35 – 0.45	Moderate	USA (~0.39), China (~0.38)
0.45 – 0.55	High	Mexico (~0.45), Turkey (~0.41)
0.55 – 1.00	Very High	South Africa (~0.63), Namibia (~0.59)

Summary

Enter a list of income or wealth values to calculate the Gini coefficient and plot the Lorenz curve.

How it works

Enter income or wealth values in the text area, one value per line.
Click "Calculate" to sort the values in ascending order.
The tool computes the Gini coefficient using the standard formula: G = (2 * sum of rank-weighted values) / (n * total) - (n + 1) / n.
The Lorenz curve is plotted by mapping cumulative population share (x-axis) against cumulative income share (y-axis).
The 45-degree line of perfect equality is drawn for comparison — the farther the Lorenz curve bows below it, the higher the inequality.
Read the Gini coefficient (0–1 scale) and interpret it using the reference table shown.

Use cases

Analyze income distribution data for a country, region, or organization.
Compare inequality across different groups or time periods.
Visualize how evenly or unevenly wealth is distributed among households.
Economics coursework and homework on inequality and welfare economics.
Policy research to assess the impact of tax or transfer programs on income distribution.
Business analytics to understand revenue concentration across customers or products.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu