Value of $100 from 1840 to 1842
$100 in 1840 is equivalent in purchasing power to about $94.25 in 1842, a difference of $-5.75 over 2 years. The dollar had an average deflation rate of -2.92% per year since 1840, producing a cumulative price change of -5.75%.
This means that prices in 1842 are 5.75% lower than average prices since 1840, according to the Bureau of Labor Statistics consumer price index.
The inflation rate in 1840 was -6.45%. The inflation rate in 1842 was -5.75%. The 1842 inflation rate is lower compared to the average inflation rate of 2.02% per year between 1842 and 2025.
Contents
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| Cumulative price change | -5.75% |
| Average inflation rate | -2.92% |
| Converted amount $100 base | $94.25 |
| Price difference $100 base | $-5.75 |
| CPI in 1840 | 8.700 |
| CPI in 1842 | 8.200 |
| Inflation in 1840 | -6.45% |
| Inflation in 1842 | -5.75% |
| $100 in 1840 | $94.25 in 1842 |
Buying power of $100 in 1840
This chart shows a calculation of buying power equivalence for $100 in 1840 (price index tracking began in 1635).
For example, if you started with $100, you would need to end with $94.25 in order to "adjust" for inflation (sometimes refered to as "beating inflation").
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:
This conversion table shows various other 1840 amounts in 1842 dollars, based on the -5.75% change in prices:
| Initial value | Equivalent value |
|---|---|
| $1 dollar in 1840 | $0.94 dollars in 1842 |
| $5 dollars in 1840 | $4.71 dollars in 1842 |
| $10 dollars in 1840 | $9.43 dollars in 1842 |
| $50 dollars in 1840 | $47.13 dollars in 1842 |
| $100 dollars in 1840 | $94.25 dollars in 1842 |
| $500 dollars in 1840 | $471.26 dollars in 1842 |
| $1,000 dollars in 1840 | $942.53 dollars in 1842 |
| $5,000 dollars in 1840 | $4,712.64 dollars in 1842 |
| $10,000 dollars in 1840 | $9,425.29 dollars in 1842 |
| $50,000 dollars in 1840 | $47,126.44 dollars in 1842 |
| $100,000 dollars in 1840 | $94,252.87 dollars in 1842 |
| $500,000 dollars in 1840 | $471,264.37 dollars in 1842 |
| $1,000,000 dollars in 1840 | $942,528.74 dollars in 1842 |
Inflation by Country
Inflation can also vary widely by country. For comparison, in the UK £100.00 in 1840 would be equivalent to £90.09 in 1842, an absolute change of £-9.91 and a cumulative change of -9.91%.
Compare these numbers to the US's overall absolute change of $-5.75 and total percent change of -5.75%.
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 1840 and 1842.
Compare these values to the overall average of -2.92% per year:
| Category | Avg Inflation (%) | Total Inflation (%) | $100 in 1840 → 1842 |
|---|---|---|---|
| Food and beverages | 0.00 | 0.00 | 100.00 |
| Housing | 0.00 | 0.00 | 100.00 |
| Apparel | 0.00 | 0.00 | 100.00 |
| Transportation | 0.00 | 0.00 | 100.00 |
| Medical care | 0.00 | 0.00 | 100.00 |
| Recreation | 0.00 | 0.00 | 100.00 |
| Education and communication | 0.00 | 0.00 | 100.00 |
| Other goods and services | 0.00 | 0.00 | 100.00 |
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 1840. This table and charts use the earliest available data for each category.
How to calculate inflation rate for $100, 1840 to 1842
Our calculations use the following inflation rate formula to calculate the change in value between 1840 and 1842:
CPI in 1842 CPI in 1840
×
1840 USD value
=
1842 USD value
Then plug in historical CPI values. The U.S. CPI was 8.7 in the year 1840 and 8.2 in 1842:
8.28.7
×
$100
=
$94.25
$100 in 1840 has the same "purchasing power" or "buying power" as $94.25 in 1842.
To get the total inflation rate for the 2 years between 1840 and 1842, we use the following formula:
CPI in 1842 - CPI in 1840CPI in 1840
×
100
=
Cumulative inflation rate (2 years)
Plugging in the values to this equation, we get:
8.2 - 8.78.7
×
100
=
-6%
Data source & citation
Raw data for these calculations comes from the Bureau of Labor Statistics' Consumer Price Index (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: “$100 in 1840 → 1842 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 1 Apr. 2025, https://www.officialdata.org/us/inflation/1840?amount=100&endYear=1842.
Special thanks to QuickChart for their chart image API, which is used for chart downloads.
| Cumulative price change | -5.75% |
| Average inflation rate | -2.92% |
| Converted amount $100 base | $94.25 |
| Price difference $100 base | $-5.75 |
| CPI in 1840 | 8.700 |
| CPI in 1842 | 8.200 |
| Inflation in 1840 | -6.45% |
| Inflation in 1842 | -5.75% |
| $100 in 1840 | $94.25 in 1842 |