$1 in 1939 is equivalent in purchasing power to about $1.01 in 1940. The dollar had an average inflation rate of 0.72% per year between 1939 and 1940, producing a cumulative price increase of 0.72%. Purchasing power decreased by 0.72% in 1940 compared to 1939. On average, you would have to spend 0.72% more money in 1940 than in 1939 for the same item.

This means that prices in 1940 are 1.01 times higher than average prices since 1939, according to the Bureau of Labor Statistics consumer price index.

The 1939 inflation rate was -1.42%. The inflation rate in 1940 was 0.72%. The 1940 inflation rate is lower compared to the average inflation rate of 3.74% per year between 1940 and 2021.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1940 was 14.00. It was 13.90 in the previous year, 1939. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation.

Contents

⌃

Average inflation rate | 0.72% |

Converted amount ($1 base) | $1.01 |

Price difference ($1 base) | $0.01 |

CPI in 1939 | 13.900 |

CPI in 1940 | 14.000 |

Inflation in 1939 | -1.42% |

Inflation in 1940 | 0.72% |

$1 in 1939 | $1.01 in 1940 |

Inflation can vary widely by city, even within the United States. Here's how some cities fared in 1939 to 1940 (figures shown are purchasing power equivalents of $1):

**New York**: 1.03% average rate, $1 → $1.01, cumulative change of 1.03%**Boston, Massachusetts**: 0.94% average rate, $1 → $1.01, cumulative change of 0.94%**Detroit, Michigan**: 0.59% average rate, $1 → $1.01, cumulative change of 0.59%**Chicago, Illinois**: 0.55% average rate, $1 → $1.01, cumulative change of 0.55%**Houston, Texas**: 0.25% average rate, $1 → $1.00, cumulative change of 0.25%**Seattle, Washington**: 0.19% average rate, $1 → $1.00, cumulative change of 0.19%**Philadelphia, Pennsylvania**: 0.12% average rate, $1 → $1.00, cumulative change of 0.12%**San Francisco, California**: -0.20% average rate, $1 → $1.00, cumulative change of -0.20%**Atlanta, Georgia**: -0.31% average rate, $1 → $1.00, cumulative change of -0.31%

New York experienced the highest rate of inflation during the 1 years between 1939 and 1940 (1.03%).

Atlanta, Georgia experienced the lowest rate of inflation during the 1 years between 1939 and 1940 (-0.31%).

Note that some locations showing 0% inflation may have not yet reported latest data.

Inflation can also vary widely by country. For comparison, in the UK £1.00 in 1939 would be equivalent to £1.17 in 1940, an absolute change of £0.17 and a cumulative change of 16.76%.

In Canada, CA$1.00 in 1939 would be equivalent to CA$1.05 in 1940, an absolute change of CA$0.05 and a cumulative change of 5.13%.

Compare these numbers to the US's overall absolute change of $0.01 and total percent change of 0.72%.

CPI is the weighted combination of many categories of spending that are tracked by the government. Breaking down these categories helps explain the main drivers behind price changes. This chart shows the average rate of inflation for select CPI categories between 1939 and 1940.

Compare these values to the overall average of 0.72% per year:

Category | Avg Inflation (%) | Total Inflation (%) | $1 in 1939 → 1940 |
---|---|---|---|

Food and beverages | 0.00 | 0.00 | 1.00 |

Housing | 0.00 | 0.00 | 1.00 |

Apparel | 0.90 | 0.90 | 1.01 |

Transportation | -0.56 | -0.56 | 0.99 |

Medical care | 0.00 | 0.00 | 1.00 |

Recreation | 0.00 | 0.00 | 1.00 |

Education and communication | 0.00 | 0.00 | 1.00 |

Other goods and services | 0.00 | 0.00 | 1.00 |

For all these visualizations, it's important to note that not all categories may have been tracked since 1939. This table and charts use the earliest available data for each category.

Our calculations use the following inflation rate formula to calculate the change in value between 1939 and 1940:

CPI in 1940
CPI in 1939

×

1939 USD value

=

1940 USD value

Then plug in historical CPI values. The U.S. CPI was 13.9 in the year 1939 and 14 in 1940:

1413.9

×

$1

=

$1 in 1939 has the same "purchasing power" or "buying power" as $1.01 in 1940.

To get the total inflation rate for the 1 years between 1939 and 1940, we use the following formula:

CPI in 1940 - CPI in 1939CPI in 1939

×

100

=

Plugging in the values to this equation, we get:

14 - 13.913.9

×

100

=

To help put this inflation into perspective, if we had invested $1 in the S&P 500 index in 1939, our investment would be * nominally* worth approximately $0.94 in 1940. This is a return on investment of -6.20%, with an absolute return of $-0.06 on top of the original $1.

These numbers are not inflation adjusted, so they are considered *nominal*. In order to evaluate the *real* return on our investment, we must calculate the return with inflation taken into account.

The compounding effect of inflation would account for 0.71% of returns ($0.01) during this period. This means the inflation-adjusted * real* return of our $1 investment is $-0.07. You may also want to account for capital gains tax, which would take your real return down to around $0 for most people.

Original Amount | Final Amount | Change | |
---|---|---|---|

Nominal |
$1 | $0.94 | -6.20% |

RealInflation Adjusted |
$1 | $0.93 | -6.87% |

Information displayed above may differ slightly from other S&P 500 calculators. Minor discrepancies can occur because we use the latest CPI data for inflation, annualized inflation numbers for previous years, and we compute S&P price and dividends from January of 1939 to latest available data for 1940 using average monthly close price.

For more details on the S&P 500 between 1939 and 1940, see the stock market returns calculator.

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

- Hitler makes a speech to the German Reichstag where he threatens Jews.
- Mahatma Gandhi begins his fast in protest against Britain’s autocratic rule in India
- The Battle of Nanchang takes place between the Kuomintang ant the Japanese, during Sino-Japanese War.
- The Spanish Civil War ends when Madrid falls to Francisco Franco.
- Britain and France declare war on Germany after it invades Poland, signaling the start of World War II.
- Mussolini’s Italy joins Hitler's war against Great Britain and France.
- Winston Churchill is named British Prime Minister, succeeding Neville Chamberlain.
- Nazi blitzkrieg conquest of France begins when the Germans cross the Muese River.
- Auschwitz concentration camp is opened in Nazi-controlled Poland.

Raw data for these calculations comes from the Bureau of Labor Statistics' Consumer Price Index (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 1940 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 20 Sep. 2021, https://www.officialdata.org/inflation-rate-in-1940.

Special thanks to QuickChart for their chart image API, which is used for chart downloads.

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

Average inflation rate | 0.72% |

Converted amount ($1 base) | $1.01 |

Price difference ($1 base) | $0.01 |

CPI in 1939 | 13.900 |

CPI in 1940 | 14.000 |

Inflation in 1939 | -1.42% |

Inflation in 1940 | 0.72% |

$1 in 1939 | $1.01 in 1940 |