# Value of 1980 US Dollars today

\$100 in 1980

\$339.82 in 2021

The inflation rate in the United States between 1980 and today has been 239.82%, which translates into a total increase of \$239.82. This means that 100 dollars in 1980 are equivalent to 339.82 dollars in 2021. In other words, the purchasing power of \$100 in 1980 equals \$339.82 today. The average annual inflation rate has been 2.96%.

## Inflation timeline in the United States (1980-2021)

The following chart depicts the equivalence of \$100 throughout the years due to inflation and CPI changes. All values are equivalent in terms of purchasing power, which means that for each year the same goods or services could be bought with the indicated amount of money.

All calculations are performed in the local currency (USD) and using 6 decimal digits. Results show only up to 2 decimal digits to favour readability. Inflation data is provided by governments and international institutions on a monthly basis. Today's values were obtained by estimating figures from recent trends.

The following table contains relevant indicators:

Indicator Value
Total Inflation (1980-2021) 239.6%
Total Inflation* 239.82%
Annual inflation avg. (1980-2021) 3.03%
Annual inflation avg.* 2.96%
CPI 1980 32.36
CPI 2021 109.9
CPI today* 109.97
\$1 in 1980 \$3.4 in 2021

* Values extrapolated from the last official data to obtain today's values.

## How to calculate today's value of money after inflation?

There are several ways to calculate the time value of money. Depending on the data available, results can be obtained by using the compound interest formula or the Consumer Price Index (CPI) formula.

#### Using the compound interest formula

Given that money changes with time as a result of an inflation rate that acts as a compound interest, the following formula can be used: FV = PV (1 + i)n, where:

• FV: Future Value
• PV: Present Value
• i: Interest rate (inflation)
• n: Number of times the interest is compounded (i.e. # of years)

In this case, the future value represents the final amount obtained after applying the inflation rate to our initial value. In other words, it indicates how much are \$100 worth today. There are 41 years between 1980 and 2021 and the average inflation rate has been 2.9553%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = \$100 * (1 + 0.03)41 = \$339.6

#### Using the CPI formula

When the CPI for both start and end years is known, the following formula can be used:

Final value = Initial value *
CPI final/CPI initial

In this case, the CPI in 1980 was 32.36 and the CPI today is 109.97. Therefore,

Final value = Initial value *
CPI final/CPI initial
= \$100 *
109.9/32.36
= \$339.6

### USA inflation - Conversion table

Initial Value Equivalent value
\$1 dollar in 1980 \$3.4 dollars today
\$5 dollars in 1980 \$16.99 dollars today
\$10 dollars in 1980 \$33.98 dollars today
\$50 dollars in 1980 \$169.91 dollars today
\$100 dollars in 1980 \$339.82 dollars today
\$500 dollars in 1980 \$1,699.1 dollars today
\$1,000 dollars in 1980 \$3,398.2 dollars today
\$5,000 dollars in 1980 \$16,990.98 dollars today
\$10,000 dollars in 1980 \$33,981.96 dollars today
\$50,000 dollars in 1980 \$169,909.79 dollars today
\$100,000 dollars in 1980 \$339,819.57 dollars today
\$500,000 dollars in 1980 \$1,699,097.87 dollars today
\$1,000,000 dollars in 1980 \$3,398,195.73 dollars today

Period Value
1980 100
1981 112.52
1982 122.56
1983 127.25
1984 132.07
1985 137.29
1986 142.5
1987 144.07
1988 150.46
1989 157.11
1990 164.41
1991 174.45
1992 179.79
1993 185.01
1994 190.09
1995 195.18
1996 200.13
1997 206.78
1998 210.3
1999 213.69
2000 219.43
2001 226.86
2002 230.38
2003 235.85
2004 240.29
2005 248.11
2006 256.58
2007 263.1
2008 273.84
2009 274.09
2010 281.55
2011 285.76
2012 294.23
2013 299.35
2014 303.84
2015 306.14
2016 308.38
2017 314.77
2018 321.41
2019 327.55
2020 335.04
2021 339.6
Today 339.82