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Finance Calculators
Gini Coefficient Estimator
Estimate the Gini coefficient — a measure of income inequality from 0 (perfect equality) to 1 (maximum inequality) — from a list of incomes.
Estimated Gini coefficient
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About the Gini Coefficient Estimator
The Gini coefficient summarizes income (or wealth) inequality across a population in a single number: 0 means perfectly equal incomes, while 1 means one person holds all the income and everyone else has none.
Formula: Gini = (2 × ∑(ranki × incomei)) ÷ (n × ∑income) − (n + 1) ÷ n, with incomes sorted in ascending order and ranked from 1 to n.
Real-world national Gini coefficients typically range from about 0.25 (highly equal economies) to over 0.55 (highly unequal economies) — this simplified estimator works from a small sample list rather than full population data.
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