You Will Need
 A country
 Nominal GDP
 A calculator
 A computer with internet access (optional)
Steps

Step 1
Choose a country or region to study
Choose a country or a region that you wish to study and learn more about its gross domestic product.

Step 2
Find the nominal GDP
Find the nominal GDP for your chosen region. The nominal GDP is the country's gross domestic product measured at today's market prices.

Step 3
Select a base year you wish to compare
Select a base year that you will use for comparison to the current gross domestic product.

Step 4
Get the real GDP for your base year
Get the real GDP measurement for your country. The real GDP is the gross domestic product of your country, measured in dollars from your base year.

Step 5
Divide nominal GDP by real GDP, multiply by 100
Divide the nominal GDP by the real GDP. Multiply this total by 100 to find the GDP deflator.

Step 6
Interpret the GDP deflator
Interpret the GDP deflator. Think of it as the ratio of today's prices to those of your base year. A deflator of 200 means that the current year's GDP is twice that of the base year, signaling inflation.