Commonly abbreviated to GDP, Gross Domestic ProductCommonly abbreviated to GDP, Gross Domestic Product is a ver... is a very frequently used term in business and economics, and basically refers to a nation’s total production at marketThe commercial activity of buying and selling goods and serv... values. GDP is however not easily explained or understood at a detailed and precise level. GDP may be calculated in different ways. Each method requires some qualification of precise definition, and then comprises quite complex formulae, mainly to ensure there is no double-counting, and no ommissions. The main methods seem to be as follows, although each nation has its own rules, and various institutional bodies produce other rules and standards for calculations and definitions. Ordinary people can reasonably regard fully detailed definitions of GDP very confusing. Lots of experts do too. Here is a very simple guide: Simply, and firstly, GDP may be calculated by totalling the marketThe commercial activity of buying and selling goods and serv... (sales) values of all products and services. GDP may instead be expressed as the combined total spending on products and services by consumers, industry and state. Alternatively, GDP may be expressed in terms of a population’s total incomes, plus other items such as corporate profits and taxes on products/services. Each of these methods contains several and variable minor additional factors and caviats. Other methods exist as well, as if the basic two or three methods were not confusing enough.