Gross Domestic Product (GDP) is the primary measure of a country's economic output, representing the total value of goods and services produced within a given period. This GDP calculator helps you compute GDP using the expenditure approach, which sums consumption, investment, government spending, and net exports (exports minus imports). It's useful for economics students learning national income accounting, researchers analyzing economic data, or anyone wanting to understand how these components combine to represent overall economic activity. Understanding GDP and its components helps contextualize economic news, policy discussions, and comparisons between different economies or time periods.