How to use this calculator
- Enter nonnegative income or wealth observations.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Use your own matching-period observations. These descriptive calculations are not forecasts, investment advice or a national dataset. Lists accept up to 100 comma-separated numbers; do not enter thousands separators. Unweighted sample, no finite-sample correction; negative wealth is unsupported and all-zero sample has Gini zero.
Worked example
For the sample inputs shown above, sample gini coefficient produces a first result of approximately 0.6666666667. The assumptions below explain what this result represents.
What the result means
Measure inequality within the user-supplied nonnegative sample and export its Lorenz curve.
Common questions
How is the calculation performed?
For sorted x: G = 2×sum(i×xᵢ)/(n×sum(x))−(n+1)/n, with i starting at 1.
What does the model leave out?
Use your own matching-period observations. These descriptive calculations are not forecasts, investment advice or a national dataset. Lists accept up to 100 comma-separated numbers; do not enter thousands separators. Unweighted sample, no finite-sample correction; negative wealth is unsupported and all-zero sample has Gini zero.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.
Background reference: www.itl.nist.gov — financial method. FinanceMath implements its own calculator.