$40 in 1909 is worth $1,364.07 today

Value of $40 from 1909 to 2024

$40 in 1909 is equivalent in purchasing power to about $1,364.07 today, an increase of $1,324.07 over 115 years. The dollar had an average inflation rate of 3.12% per year between 1909 and today, producing a cumulative price increase of 3,310.18%.

This means that today's prices are 34.10 times as high as average prices since 1909, according to the Bureau of Labor Statistics consumer price index. A dollar today only buys 2.932% of what it could buy back then.

The inflation rate in 1909 was -1.09%. The current inflation rate compared to last year is now 3.15%. If this number holds, $40 today will be equivalent in buying power to $41.26 next year. The current inflation rate page gives more detail on the latest inflation rates.


Inflation from 1909 to 2024
Cumulative price change3,310.18%
Average inflation rate3.12%
Converted amount
$40 base
$1,364.07
Price difference
$40 base
$1,324.07
CPI in 19099.100
CPI in 2024310.326
Inflation in 1909-1.09%
Inflation in 20243.15%
$40 in 1909$1,364.07 in 2024

USD inflation since 1909
Annual Rate, the Bureau of Labor Statistics CPI
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Buying power of $40 in 1909

This chart shows a calculation of buying power equivalence for $40 in 1909 (price index tracking began in 1635).

For example, if you started with $40, you would need to end with $1,364.07 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When $40 is equivalent to $1,364.07 over time, that means that the "real value" of a single U.S. dollar decreases over time. In other words, a dollar will pay for fewer items at the store.

This effect explains how inflation erodes the value of a dollar over time. By calculating the value in 1909 dollars, the chart below shows how $40 is worth less over 115 years.

According to the Bureau of Labor Statistics, each of these USD amounts below is equal in terms of what it could buy at the time:

Dollar inflation: 1909-2024
YearDollar ValueInflation Rate
1909$40.00-1.09%
1910$41.764.40%
1911$41.760.00%
1912$42.642.11%
1913$43.522.06%
1914$43.961.01%
1915$44.401.00%
1916$47.917.92%
1917$56.2617.43%
1918$66.3717.97%
1919$76.0414.57%
1920$87.9115.61%
1921$78.68-10.50%
1922$73.85-6.15%
1923$75.161.79%
1924$75.160.00%
1925$76.922.34%
1926$77.801.14%
1927$76.48-1.69%
1928$75.16-1.72%
1929$75.160.00%
1930$73.41-2.34%
1931$66.81-8.98%
1932$60.22-9.87%
1933$57.14-5.11%
1934$58.903.08%
1935$60.222.24%
1936$61.101.46%
1937$63.303.60%
1938$61.98-2.08%
1939$61.10-1.42%
1940$61.540.72%
1941$64.625.00%
1942$71.6510.88%
1943$76.046.13%
1944$77.361.73%
1945$79.122.27%
1946$85.718.33%
1947$98.0214.36%
1948$105.938.07%
1949$104.62-1.24%
1950$105.931.26%
1951$114.297.88%
1952$116.481.92%
1953$117.360.75%
1954$118.240.75%
1955$117.80-0.37%
1956$119.561.49%
1957$123.523.31%
1958$127.032.85%
1959$127.910.69%
1960$130.111.72%
1961$131.431.01%
1962$132.751.00%
1963$134.511.32%
1964$136.261.31%
1965$138.461.61%
1966$142.422.86%
1967$146.813.09%
1968$152.974.19%
1969$161.325.46%
1970$170.555.72%
1971$178.024.38%
1972$183.743.21%
1973$195.166.22%
1974$216.7011.04%
1975$236.489.13%
1976$250.115.76%
1977$266.376.50%
1978$286.597.59%
1979$319.1211.35%
1980$362.2013.50%
1981$399.5610.32%
1982$424.186.16%
1983$437.803.21%
1984$456.704.32%
1985$472.973.56%
1986$481.761.86%
1987$499.343.65%
1988$520.004.14%
1989$545.054.82%
1990$574.515.40%
1991$598.684.21%
1992$616.703.01%
1993$635.162.99%
1994$651.432.56%
1995$669.892.83%
1996$689.672.95%
1997$705.492.29%
1998$716.481.56%
1999$732.312.21%
2000$756.923.36%
2001$778.462.85%
2002$790.771.58%
2003$808.792.28%
2004$830.332.66%
2005$858.463.39%
2006$886.153.23%
2007$911.392.85%
2008$946.393.84%
2009$943.02-0.36%
2010$958.491.64%
2011$988.743.16%
2012$1,009.202.07%
2013$1,023.991.46%
2014$1,040.601.62%
2015$1,041.830.12%
2016$1,054.981.26%
2017$1,077.452.13%
2018$1,104.312.49%
2019$1,123.771.76%
2020$1,137.631.23%
2021$1,191.084.70%
2022$1,286.408.00%
2023$1,339.354.12%
2024$1,364.071.85%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 109 more rows

This conversion table shows various other 1909 amounts in today's dollars, based on the 3,310.18% change in prices:

Conversion: 1909 dollars today
Initial valueEquivalent value
$1 dollar in 1909$34.10 dollars today
$5 dollars in 1909$170.51 dollars today
$10 dollars in 1909$341.02 dollars today
$50 dollars in 1909$1,705.09 dollars today
$100 dollars in 1909$3,410.18 dollars today
$500 dollars in 1909$17,050.88 dollars today
$1,000 dollars in 1909$34,101.76 dollars today
$5,000 dollars in 1909$170,508.79 dollars today
$10,000 dollars in 1909$341,017.58 dollars today
$50,000 dollars in 1909$1,705,087.91 dollars today
$100,000 dollars in 1909$3,410,175.82 dollars today
$500,000 dollars in 1909$17,050,879.12 dollars today
$1,000,000 dollars in 1909$34,101,758.24 dollars today

Inflation by Country

Inflation can also vary widely by country. For comparison, in the UK £40.00 in 1909 would be equivalent to £5,966.89 in 2024, an absolute change of £5,926.89 and a cumulative change of 14,817.22%.

Compare these numbers to the US's overall absolute change of $1,324.07 and total percent change of 3,310.18%.


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 2024.

Compare these values to the overall average of 3.12% per year:

CategoryAvg Inflation (%)Total Inflation (%)$40 in 1909 → 2024
Food and beverages3.998,873.413,589.36
Housing4.2411,803.544,761.41
Apparel1.97843.06377.22
Transportation3.344,274.431,749.77
Medical care4.6017,479.037,031.61
Recreation1.36374.91189.96
Education and communication1.73622.76289.10
Other goods and services4.9525,844.9110,377.96

The graph below compares inflation in categories of goods over time. Click on a category such as "Food" to toggle it on or off:

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 $40 since 1909

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

CPI today CPI in 1909
×
1909 USD value
=
Today's value

Then plug in historical CPI values. The U.S. CPI was 9.1 in the year 1909 and 310.326 in 2024:

310.3269.1
×
$40
=
$1,364.07

$40 in 1909 has the same "purchasing power" or "buying power" as $1,364.07 in 2024.

To get the total inflation rate for the 115 years between 1909 and 2024, we use the following formula:

CPI in 2024 - CPI in 1909CPI in 1909
×
100
=
Cumulative inflation rate (115 years)

Plugging in the values to this equation, we get:

310.326 - 9.19.1
×
100
=
3,310%

Comparison to S&P 500 Index

The average inflation rate of 3.12% has a compounding effect between 1909 and 2024. As noted above, this yearly inflation rate compounds to produce an overall price difference of 3,310.18% over 115 years.

To help put this inflation into perspective, if we had invested $40 in the S&P 500 index in 1909, our investment would be nominally worth approximately $1,931,288.87 in 2024. This is a return on investment of 4,828,122.18%, with an absolute return of $1,931,248.87 on top of the original $40.

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 97.07% of returns ($1,874,655.76) during this period. This means the inflation-adjusted real return of our $40 investment is $56,593.12. You may also want to account for capital gains tax, which would take your real return down to around $48,104 for most people.

Investment in S&P 500 Index, 1909-2024
Original AmountFinal AmountChange
Nominal$40$1,931,288.874,828,122.18%
Real
Inflation Adjusted
$40$56,633.12141,482.79%

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 2024 using average monthly close price.

For more details on the S&P 500 between 1909 and 2024, see the stock market returns calculator.


Data source & citation

Raw data for these calculations comes from the Bureau of Labor Statistics' (CPI), established in 1913. Price index data from 1774 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University and from the American Antiquarian Society. Price index data from 1634 to 1773 is from the American Antiquarian Society, using British pound equivalents.

You may use the following MLA citation for this page: “$40 in 1909 → 2024 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 14 Mar. 2024, https://www.officialdata.org/us/inflation/1909?amount=40.

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 2024
Cumulative price change3,310.18%
Average inflation rate3.12%
Converted amount
$40 base
$1,364.07
Price difference
$40 base
$1,324.07
CPI in 19099.100
CPI in 2024310.326
Inflation in 1909-1.09%
Inflation in 20243.15%
$40 in 1909$1,364.07 in 2024