Economics

Income Elasticity of Demand Calculator

Calculate income elasticity of demand using midpoint percentage changes in quantity demanded and income.

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Move between demand elasticities, real and nominal GDP relationships, fiscal multipliers and the textbook money-multiplier model.

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Income Elasticity of Demand Calculator is an educational economics tool for exploring a standard quantitative relationship.

How it works

Enter the requested values using the stated definitions. The calculator validates the numerical domain and applies YED = midpoint %ΔQd / midpoint %ΔIncome.

The formula

YED = midpoint %ΔQd / midpoint %ΔIncome

Variables: Q₁ = Old quantity demanded; Q₂ = New quantity demanded; Y₁ = Old income; Y₂ = New income.

Worked example

Example: Q: 100 → 110 and income: 5000 → 5500 gives YED = 1.

Frequently asked questions

What is this economics calculator intended for?

It is intended for study, classroom exercises and quick exploration of the stated economic relationship.

Does the result fully describe a real economy?

No. Real economic outcomes depend on assumptions, institutions, expectations, market structure, policy settings, measurement choices and other factors beyond a simplified formula.

Last content reviewSeptember 26, 2026
Editorial reviewHe-Sab Editorial Review

Sources and references

These sources are used to verify terminology, formulas, and information related to this calculator.