GDP Growth Rate Calculator

GDP growth measures how quickly an economy’s output changed between two comparable periods. Enter GDP in billions of the same currency and on the same nominal or inflation-adjusted basis to see the period change, an annualized rate, and output per person.

The GDP growth formula

The period growth rate is ((current GDP ÷ previous GDP) − 1) × 100. If current GDP is 28,010 and previous GDP was 27,610, output increased by about 1.45% during the period. The absolute number is meaningful only when both figures use the same currency, unit, seasonal adjustment, and price basis.

Period growth versus annualized growth

A quarterly change is not automatically a yearly change. U.S. headline GDP releases often express quarter-to-quarter growth at an annualized rate. The annualized result compounds the period ratio four times for quarterly data. It describes what a full year would look like if that pace persisted; it is not a forecast that the pace will continue.

Nominal and real GDP cannot be mixed

Nominal GDP uses current prices, so its growth includes both changes in production and changes in prices. Real GDP adjusts for inflation. Comparing a real figure with a nominal figure produces a meaningless result. Check the series label and units before calculating.

What this calculator leaves out

GDP estimates are revised, population figures may use different reference dates, and international comparisons require consistent exchange-rate or purchasing-power methods. GDP per person is an average, not a measure of household income or how evenly output is distributed.

For U.S. inputs, use comparable series and units from the Bureau of Economic Analysis GDP data.

Frequently asked questions

How is GDP growth calculated?

Subtract the previous period GDP from current GDP, divide by previous GDP, and multiply by 100.

Is quarterly GDP growth automatically an annual rate?

No. A one-quarter change and an annualized quarterly rate are different. This calculator shows both when you choose quarterly periods.