U.S. inflation rate in 1939: -1.42%

Inflation Calculator


Inflation in 1939 and Its Effect on Dollar Value

Purchasing power increased by 1.42% in 1939 compared to the previous year, 1938. On average, you would have to spend 1.42% less money in 1939 than in 1938 for the same item. This is an example of deflation.

In other words, $100 in 1938 is equivalent in purchasing power to $98.58 in 1939.

The 1938 inflation rate was -2.08%. The inflation rate in 1939 was -1.42%. The 1939 inflation rate is lower compared to the average inflation rate of 3.74% per year between 1939 and 2018.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1939 was 13.9. It was 14.1 in the previous year, 1938. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation. Because the 1939 CPI is less than 1938 CPI, negative inflation (also known as deflation) has occurred.

Inflation from 1938 to 1939
Average inflation rate -1.42%
Converted amount ($100 base) $98.58
Price difference ($100 base) $-1.42
CPI in 1938 14.1
CPI in 1939 13.9
Inflation in 1938 -2.08%
Inflation in 1939 -1.42%

U.S. Inflation since 1913
Annual Rate, U.S. Bureau of Labor Statistics CPI

Inflation by City

Inflation can vary widely by city, even within the United States. Here's how some cities fared in 1938 to 1939 (figures shown are purchasing power equivalents of $100):

New York experienced the highest rate of inflation during the 1 years between 1938 and 1939 (-0.46%).

Detroit, Michigan experienced the lowest rate of inflation during the 1 years between 1938 and 1939 (-3.44%).

Inflation by Country

Inflation can also vary widely by country. For comparison, in the UK £100.00 in 1938 would be equivalent to £102.98 in 1939, an absolute change of £2.98 and a cumulative change of 2.98%.

In Canada, CA$100.00 in 1938 would be equivalent to CA$102.63 in 1939, an absolute change of CA$2.63 and a cumulative change of 2.63%.

Compare these numbers to the US's overall absolute change of $-1.42 and total percent change of -1.42%.

Inflation by Spending Category

CPI is the weighted combination of many categories of spending that are tracked by the government. This chart shows the average rate of inflation for select CPI categories between 1938 and 1939.

Compare these values to the overall average of -1.42% per year:

Category Avg Inflation (%) Total Inflation (%) $100 in 1938 → 1939
Food -2.60 -2.60 97.40
Shelter 0.00 0.00 100.00
Energy 0.00 0.00 100.00
Apparel -1.10 -1.10 98.90
New vehicles 0.00 0.00 100.00
Used cars and trucks 0.00 0.00 100.00
Transportation services 0.00 0.00 100.00
Medical care services 0.95 0.95 100.95
Medical care commodities 0.00 0.00 100.00

It's important to note that not all categories may be tracked since 1938. This table and visualization use the earliest available data for each category.

How to Calculate Inflation Rate for $100, 1938 to 1939

This inflation calculator uses the following inflation rate formula:

CPI in 1939CPI in 1938
1938 USD value
1939 USD value

Then plug in historical CPI values. The U.S. CPI was 14.1 in the year 1938 and 13.9 in 1939:


$100 in 1938 has the same "purchasing power" or "buying power" as $98.58 in 1939.

To get the total inflation rate for the 1 years between 1938 and 1939, we use the following formula:

CPI in 1939 - CPI in 1938CPI in 1938
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

13.9 - 14.114.1

Comparison to S&P 500 Index

To help put this inflation into perspective, if you had invested $100 in the S&P 500 index in 1938, your investment would be worth approximately $121.00 in 1939. This is a change of 21.00%.

This means the nominal return on a $100 investment is $21.00, but inflation would eat into your real returns.

Inflation would account for -1.44% of your returns ($-0.30), for an inflation-adjusted real return of about $21.30.

News headlines from 1938

Politics and news often influence economic performance. Here's what was happening at the time:

  • Anthony Eden resigns as United Kingdom's Foreign Secretary after stating that Prime Minister Neville Chamberlain has appeased Nazi Germany.
  • Czechoslovakia is forced to give territory to Germany after the Treaty of Munich was signed by Hitler, Mussolini, Daladier and Chamberlain.
  • Joseph Kennedy is named the 44th US Ambassador to the United Kingdom.

Data Source & Citation

Raw data for these calculations comes from the Bureau of Labor Statistics' (CPI), established in 1913. Inflation data from 1665 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University.

You may use the following MLA citation for this page: “Inflation Rate in 1939 | Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 21 Oct. 2018, https://www.officialdata.org/inflation-rate-in-1939.

in2013dollars.com is a reference website maintained by the Official Data Foundation.

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