$100 in 1985 is worth $89.68 in 1982

Buying power of $100 in 1982

This chart shows a calculation of buying power equivalence for $100 in 1982 (price index tracking began in 1635).

For example, if you started with $100, you would need to end with $89.68 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When $100 is equivalent to $89.68 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 1982 dollars, the chart below shows how $100 is worth less over 3 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 1982 amounts in 1985 dollars, based on the -10.32% change in prices:

Inflation by City

Inflation can vary widely by city, even within the United States. Here's how some cities fared in 1985 to 1982 (figures shown are purchasing power equivalents of $100):

• Boston, Massachusetts: 4.59% average rate, $100 → $114.41, cumulative change of 14.41%
• New York: 4.47% average rate, $100 → $114.03, cumulative change of 14.03%
• Atlanta, Georgia: 4.29% average rate, $100 → $113.42, cumulative change of 13.42%
• Philadelphia, Pennsylvania: 4.05% average rate, $100 → $112.64, cumulative change of 12.64%
• Dallas-Fort Worth, Texas: 4.03% average rate, $100 → $112.59, cumulative change of 12.59%
• Chicago, Illinois: 3.84% average rate, $100 → $111.98, cumulative change of 11.98%
• San Francisco, California: 3.50% average rate, $100 → $110.88, cumulative change of 10.88%
• Detroit, Michigan: 3.28% average rate, $100 → $110.16, cumulative change of 10.16%
• Miami-Fort Lauderdale, Florida: 3.26% average rate, $100 → $110.11, cumulative change of 10.11%
• Seattle, Washington: 2.60% average rate, $100 → $108.00, cumulative change of 8.00%
• Houston, Texas: 2.57% average rate, $100 → $107.90, cumulative change of 7.90%

Boston, Massachusetts experienced the highest rate of inflation during the 3 years between 1982 and 1985 (4.59%).

Houston, Texas experienced the lowest rate of inflation during the 3 years between 1982 and 1985 (2.57%).

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 1985 would be equivalent to £85.85 in 1982, an absolute change of £-14.15 and a cumulative change of -14.15%.

In Canada, CA$100.00 in 1985 would be equivalent to CA$87.11 in 1982, an absolute change of CA$-12.89 and a cumulative change of -12.89%.

Compare these numbers to the US's overall absolute change of $-10.32 and total percent change of -10.32%.

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.

Between 1982 and 1985:

• Gas prices increased from $1.36 per gallon to $1.15
• Bread prices increased from $0.54 per loaf to $0.55
• Egg prices increased from $0.93 per carton to $0.75
• Chicken prices increased from $0.71 per per 1 lb of whole chicken to $0.77
• Electricity prices increased from $0.07 per KwH to $0.08

This chart shows the average rate of inflation for select CPI categories between 1985 and 1982.

Compare these values to the overall average of 3.70% 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 1985. This table and charts use the earliest available data for each category.

How to calculate inflation rate for $100, 1982 to 1985

Our calculations use the following inflation rate formula to calculate the change in value between 1982 and 1985:

Then plug in historical CPI values. The U.S. CPI was 107.6 in the year 1985 and 96.5 in 1982:

$100 in 1985 has the same "purchasing power" or "buying power" as $89.68 in 1982.

To get the total inflation rate for the 3 years between 1982 and 1985, we use the following formula:

Plugging in the values to this equation, we get:

Alternate Measurements of Inflation

There are multiple ways to measure inflation. Published rates of inflation will vary depending on methodology. The Consumer Price Index, used above, is the most common standard used globally.

Alternative measurements are sometimes used based on context and economic/political circumstances. Below are a few examples of alternative measurements.

Personal Consumption Expenditures (PCE) Inflation

The PCE Price Index is the U.S. Federal Reserve's preferred measure of inflation, compiled by the Bureau of Economic Analysis. It measures the change in prices of goods and services purchased by consumers.

The PCE Price Index changed by 3.84% per year on average between 1985 and 1982. The total PCE inflation between these dates was 11.97%. In 1985, PCE inflation was 5.55%.

This means that the PCE Index equates $100 in 1985 with $111.97 in 1982, a difference of $11.97. Compare this to the standard CPI measurement, which equates $100 with $89.68. The PCE measured 22.28% inflation compared to standard CPI.

For more information on the difference between PCE and CPI, see this analysis provided by the Bureau of Labor Statistics.

Core Inflation

Also of note is the Core CPI, which uses the standard CPI but omits the more volatile categories of food and energy.

Core inflation averaged 4.42% per year between 1985 and 1982 (vs all-CPI inflation of 3.70%), for an inflation total of 13.84%. In 1985, core inflation was 7.40%.

When using the core inflation measurement, $100 in 1985 is equivalent in buying power to $113.84 in 1982, a difference of $13.84. Recall that the converted amount is $89.68 when all items including food and energy are measured.

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.