According to the Bureau of Labor Statistics consumer price index, prices in 2018 are 51.35% higher than prices in 1999. The dollar experienced an average inflation rate of 2.70% per year during this period.
In other words, $100 in 1999 is equivalent in purchasing power to $151.35 in 2018, a difference of $51.35 over 19 years.
The 1999 inflation rate was 2.21%. The current inflation rate (2017 to 2018) is now 2.70%1. If this number holds, $100 today will be equivalent to $102.70 next year. The current inflation rate page gives more detail on the latest official inflation rates.
|Cumulative price change||51.35%|
|Average inflation rate||2.70%|
|Converted amount ($100 base)||$151.35|
|Price difference ($100 base)||$51.35|
|CPI in 1999||166.6|
|CPI in 2018||252.146|
|Inflation in 1999||2.21%|
|Inflation in 2018||2.70%|
This chart shows calculations of buying power equivalence over time for $100 in 1999 (price index tracking began in 1635).
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:
|Year||USD Value||Inflation Rate|
Inflation can vary widely by city, even within the United States. Here's how some cities fared in 1999 to 2018 (figures shown are purchasing power equivalents of $100):
San Diego, California experienced the highest rate of inflation during the 19 years between 1999 and 2018 (4.06%).
Chicago, Illinois experienced the lowest rate of inflation during the 19 years between 1999 and 2018 (1.83%).
Inflation can also vary widely by country. For comparison, in the UK £100.00 in 1999 would be equivalent to £168.32 in 2018, an absolute change of £68.32 and a cumulative change of 68.32%.
In Canada, CA$100.00 in 1999 would be equivalent to CA$142.26 in 2018, an absolute change of CA$42.26 and a cumulative change of 42.26%.
Compare these numbers to the US's overall absolute change of $51.35 and total percent change of 51.35%.
CPI is the weighted combination of many categories of spending that are tracked by the government. This chart shows the average rate of inflation for select CPI categories between 1999 and 2018.
Compare these values to the overall average of 2.70% per year:
|Category||Avg Inflation (%)||Total Inflation (%)||$100 in 1999 → 2018|
|Used cars and trucks||-0.49||-8.88||91.12|
|Medical care services||3.78||102.55||202.55|
|Medical care commodities||2.69||65.58||165.58|
It's important to note that not all categories may be tracked since 1999. This table and visualization use the earliest available data for each category.
This inflation calculator uses the following inflation rate formula:
Then plug in historical CPI values. The U.S. CPI was 166.6 in the year 1999 and 252.146 in 2018:
$100 in 1999 has the same "purchasing power" or "buying power" as $151.35 in 2018.
To get the total inflation rate for the 19 years between 1999 and 2018, we use the following formula:
Plugging in the values to this equation, we get:
The above data describe the CPI for all items. Also of note is the Core CPI, which measures inflation for all items except for the more volatile categories of food and energy. Core inflation averaged 1.98% per year between 1999 and 2018 (vs all-CPI inflation of 2.70%), for an inflation total of 45.07%.
When using the core inflation measurement, $100 in 1999 is equivalent in buying power to $145.07 in 2018, a difference of $45.07. Recall that for All Items, the converted amount is $151.35 with a difference of $51.35.
In 1999, core inflation was 2.07%.
The average inflation rate of 2.70% during these years has a compounding effect. As noted above, this yearly inflation rate produces an overall price difference of 51.35% over 19 years.
To help put this inflation into perspective, if you had invested $100 in the S&P 500 index in 1999, your investment would be worth approximately $332.53 in 2018. This is a change of 232.53%.
This means the nominal return on a $100 investment is $232.53, but inflation would eat into your real returns.
Inflation would account for 33.93% of your returns ($78.89), for an inflation-adjusted real return of about $153.64.
Politics and news often influence economic performance. Here's what was happening at the time:
Raw data for these calculations comes from the Bureau of Labor Statistics' Consumer Price Index (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: “$100 in 1999 → 2018 | Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 11 Oct. 2018, https://www.officialdata.org/1999-dollars-in-2018?amount=100.
in2013dollars.com is a reference website maintained by the Official Data Foundation.