$100 in 2017 is worth $5.22 in 1917

Buying power of $100 in 1917

This chart shows a calculation of buying power equivalence for $100 in 1917 (price index tracking began in 1635).

For example, if you started with $100, you would need to end with $5.22 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When $100 is equivalent to $5.22 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 1917 dollars, the chart below shows how $100 is worth less over 100 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:

This conversion table shows various other 1917 amounts in 2017 dollars, based on the -94.78% change in prices:

Inflation by City

Inflation can vary widely by city, even within the United States. Here's how some cities fared in 2017 to 1917 (figures shown are purchasing power equivalents of $100):

• San Francisco, California: 3.36% average rate, $100 → $2,711.23, cumulative change of 2,611.23%
• Seattle, Washington: 3.33% average rate, $100 → $2,656.78, cumulative change of 2,556.78%
• New York: 3.20% average rate, $100 → $2,333.27, cumulative change of 2,233.27%
• Boston, Massachusetts: 3.13% average rate, $100 → $2,174.51, cumulative change of 2,074.51%
• Philadelphia, Pennsylvania: 3.09% average rate, $100 → $2,102.96, cumulative change of 2,002.96%
• Houston, Texas: 3.04% average rate, $100 → $1,989.25, cumulative change of 1,889.25%
• Chicago, Illinois: 3.03% average rate, $100 → $1,986.77, cumulative change of 1,886.77%
• Detroit, Michigan: 2.99% average rate, $100 → $1,901.36, cumulative change of 1,801.36%

San Francisco, California experienced the highest rate of inflation during the 100 years between 1917 and 2017 (3.36%).

Detroit, Michigan experienced the lowest rate of inflation during the 100 years between 1917 and 2017 (2.99%).

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

Inflation by Country

Inflation can also vary widely by country. For comparison, in the UK £100.00 in 2017 would be equivalent to £1.52 in 1917, an absolute change of £-98.48 and a cumulative change of -98.48%.

In Canada, CA$100.00 in 2017 would be equivalent to CA$6.04 in 1917, an absolute change of CA$-93.96 and a cumulative change of -93.96%.

Compare these numbers to the US's overall absolute change of $-94.78 and total percent change of -94.78%.

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 2017 and 1917.

Compare these values to the overall average of 3.00% per year:

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 2017. This table and charts use the earliest available data for each category.

How to calculate inflation rate for $100, 1917 to 2017

Our calculations use the following inflation rate formula to calculate the change in value between 1917 and 2017:

Then plug in historical CPI values. The U.S. CPI was 245.12 in the year 2017 and 12.8 in 1917:

$100 in 2017 has the same "purchasing power" or "buying power" as $5.22 in 1917.

To get the total inflation rate for the 100 years between 1917 and 2017, we use the following formula:

Plugging in the values to this equation, we get:

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.

» Read more about inflation and investment.