How It Works
Gross domestic product (GDP) is the broadest quantitative measure of a nation's total economic activity. Net domestic product (NDP) adjusts this figure by subtracting depreciation on the country's capital assets (housing, machinery and vehicles, for example). The depreciation is officially referred to as the "capital consumption allowance."
The Department of Commerce releases NDP data for the U.S. economy at 8:30 a.m. EST on the last business day of the quarter.
A common equation used to calculate NDP is as follows:
NDP = Gross domestic product (GDP) - Depreciation
Similarly,
NDP = Consumption + Government Expenditures + Investment +Exports - Imports - Depreciation
See the GDP definition for more on the components used to calculate GDP.