GDP Calculator
Calculate Gross Domestic Product using the expenditure approach or the income approach. Useful for macroeconomics study and analysis.
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How to use the GDP Calculator
- Enter your inputs into the GDP Calculator above.
- Results update instantly as you type — no submit button needed.
- Adjust any value to see how the result changes in real time.
The two GDP approaches
Expenditure: GDP = C + I + G + (X − M) · · · Income: GDP = Wages + Rents + Interest + Profits
C = consumer spending, I = investment, G = government spending, X = exports, M = imports. Income approach sums all factor incomes earned in production. Both approaches must give the same total.
Worked example
Consumer spending $15T + Investment $4T + Government $4T + Exports $3T − Imports $4T = GDP $22T. The same total is reached via the income approach — by accounting identity.
Frequently asked questions
What's the difference between nominal and real GDP?
Nominal GDP uses current prices; real GDP adjusts for inflation, allowing comparison across years. Real GDP growth tells you whether the economy is actually expanding or just experiencing inflation.
What does GDP miss?
Unpaid work (housework, volunteer labor), informal economy, environmental degradation, distribution of income, and quality of life improvements that don't show up in market transactions.
What is GDP per capita?
GDP divided by population — a rough measure of average economic output per person. Useful for international comparisons; doesn't capture distribution within a country.