U.S. inflation rate in 1910: 4.40%

Inflation in 1910 and its effect on dollar value

$1 in 1909 is equivalent in purchasing power to about $1.04 in 1910. The dollar had an average inflation rate of 4.40% per year between 1909 and 1910, producing a cumulative price increase of 4.40%. Purchasing power decreased by 4.40% in 1910 compared to 1909. On average, you would have to spend 4.40% more money in 1910 than in 1909 for the same item.

This means that prices in 1910 are 1.04 times higher than average prices since 1909, according to the Bureau of Labor Statistics consumer price index.

The 1909 inflation rate was -1.09%. The inflation rate in 1910 was 4.40%. The 1910 inflation rate is higher compared to the average inflation rate of 3.07% per year between 1910 and 2021.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1910 was 9.50. It was 9.10 in the previous year, 1909. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation.

Inflation from 1909 to 1910
Average inflation rate 4.40%
Converted amount ($1 base) $1.04
Price difference ($1 base) $0.04
CPI in 1909 9.100
CPI in 1910 9.500
Inflation in 1909 -1.09%
Inflation in 1910 4.40%
$1 in 1909 $1.04 in 1910

USD Inflation since 1635
Annual Rate, the Bureau of Labor Statistics CPI

Inflation by Country

Inflation can also vary widely by country. For comparison, in the UK £1.00 in 1909 would be equivalent to £1.01 in 1910, an absolute change of £0.01 and a cumulative change of 1.05%.

Compare these numbers to the US's overall absolute change of $0.04 and total percent change of 4.40%.

Inflation by Spending Category

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 1909 and 1910.

Compare these values to the overall average of 4.40% per year:

Category Avg Inflation (%) Total Inflation (%) $1 in 1909 → 1910
Food and beverages 0.00 0.00 1.00
Housing 0.00 0.00 1.00
Apparel 0.00 0.00 1.00
Transportation 0.00 0.00 1.00
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 1909. This table and charts use the earliest available data for each category.

How to Calculate Inflation Rate for $1, 1909 to 1910

Our calculations use the following inflation rate formula to calculate the change in value between 1909 and 1910:

CPI in 1910 CPI in 1909
1909 USD value
1910 USD value

Then plug in historical CPI values. The U.S. CPI was 9.1 in the year 1909 and 9.5 in 1910:


$1 in 1909 has the same "purchasing power" or "buying power" as $1.04 in 1910.

To get the total inflation rate for the 1 years between 1909 and 1910, we use the following formula:

CPI in 1910 - CPI in 1909CPI in 1909
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

9.5 - 9.19.1

Comparison to S&P 500 Index

To help put this inflation into perspective, if we had invested $1 in the S&P 500 index in 1909, our investment would be nominally worth approximately $1.12 in 1910. This is a return on investment of 12.20%, with an absolute return of $0.12 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 4.21% of returns ($0.05) 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.

Investment in S&P 500 Index, 1909-1910
Original Amount Final Amount Change
Nominal $1 $1.12 12.20%
Inflation Adjusted
$1 $1.07 7.47%

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 1909 to latest available data for 1910 using average monthly close price.

For more details on the S&P 500 between 1909 and 1910, see the stock market returns calculator.

News headlines from 1909

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

  • Russia invades Persia in support of Mohammed Ali Shah's coup d'etat against the Persian Government.
  • News that Robert Peary has discovered the North Pole reaches the world 5 months after the discovery took place.
  • Leo Baekeland of Yonkers New York patents the process of thermosetting plastic.

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 1910 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 24 Sep. 2021, https://www.officialdata.org/inflation-rate-in-1910.

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.

Ian Webster

About the author

Ian Webster is an engineer and data expert based in San Mateo, California. He has worked for Google, NASA, and consulted for governments around the world on data pipelines and data analysis. Disappointed by the lack of clear resources on the impacts of inflation on economic indicators, Ian believes this website serves as a valuable public tool. Ian earned his degree in Computer Science from Dartmouth College.

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» Read more about inflation and investment.

Inflation from 1909 to 1910
Average inflation rate 4.40%
Converted amount ($1 base) $1.04
Price difference ($1 base) $0.04
CPI in 1909 9.100
CPI in 1910 9.500
Inflation in 1909 -1.09%
Inflation in 1910 4.40%
$1 in 1909 $1.04 in 1910