Gini Coefficient Calculator
Measure income inequality and wealth distribution using the Gini index
Calculate Gini Coefficient
Area between Lorenz curve and line of equality
Area under the Lorenz curve
Gini Coefficient Results
Formula used: Gini = A / (A + B)
Calculation: 0 / (0 + 0) = 0.000
Country Comparison
Inequality Analysis
Example: USA Income Distribution
Lorenz Curve Areas
Area above Lorenz curve (A): 1,200 units²
Area below Lorenz curve (B): 3,800 units²
Total area: 5,000 units²
Calculation
Gini = A / (A + B)
Gini = 1,200 / (1,200 + 3,800)
Gini = 1,200 / 5,000
Gini = 0.240 (Moderate Inequality)
Gini Coefficient Scale
Key Facts
Developed by Corrado Gini in 1912
Used by World Bank and UN
0 = Perfect equality
1 = Perfect inequality
Cannot be negative
Understanding the Gini Coefficient
What is the Gini Coefficient?
The Gini coefficient, also called the Gini index, is a statistical metric used to measure wealth inequality within a nation or region. It ranges from 0 to 1, where 0 indicates complete equality and 1 represents complete inequality.
Applications
- •Government policy analysis
- •International development studies
- •Economic research and planning
- •Social welfare assessment
Calculation Methods
Lorenz Curve Method
Gini = A / (A + B)
Where A is the area above the Lorenz curve and B is the area below it.
Income Distribution Method
Calculate using population quintiles and their corresponding income shares, applying the trapezoidal rule for area estimation.
Note: Lower Gini values indicate more equal income distribution, while higher values suggest greater inequality.