The inflation rate in the United States between 1970 and today has been 591.17%, which translates into a total increase of \$591.17. This means that 100 dollars in 1970 are equivalent to 691.17 dollars in 2021. In other words, the purchasing power of \$100 in 1970 equals \$691.17 today. The average annual inflation rate has been 3.79%.

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## Inflation timeline in the United States (1970-2021)

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 (1970-2021) 590.91%
Total Inflation* 591.17%
Annual inflation avg. (1970-2021) 3.86%
Annual inflation avg.* 3.79%
CPI 1970 15.91
CPI 2021 109.9
CPI today* 109.94
\$1 in 1970 \$6.91 in 2021

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

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## 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 51 years between 1970 and 2021 and the average inflation rate has been 3.7877%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = \$100 * (1 + 0.04)51 = \$690.91

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 1970 was 15.91 and the CPI today is 109.94. Therefore,

Final value = Initial value *
CPI final/CPI initial
= \$100 *
109.9/15.91
= \$690.91

### USA inflation - Conversion table

Initial Value Equivalent value
\$1 dollar in 1970 \$6.91 dollars today
\$5 dollars in 1970 \$34.56 dollars today
\$10 dollars in 1970 \$69.12 dollars today
\$50 dollars in 1970 \$345.59 dollars today
\$100 dollars in 1970 \$691.17 dollars today
\$500 dollars in 1970 \$3,455.87 dollars today
\$1,000 dollars in 1970 \$6,911.74 dollars today
\$5,000 dollars in 1970 \$34,558.71 dollars today
\$10,000 dollars in 1970 \$69,117.42 dollars today
\$50,000 dollars in 1970 \$345,587.11 dollars today
\$100,000 dollars in 1970 \$691,174.22 dollars today
\$500,000 dollars in 1970 \$3,455,871.08 dollars today
\$1,000,000 dollars in 1970 \$6,911,742.16 dollars today

Period Value
1970 100
1971 105.57
1972 109.02
1973 112.73
1974 122.55
1975 137.67
1976 147.21
1977 154.38
1978 164.72
1979 179.58
1980 203.45
1981 228.91
1982 249.34
1983 258.89
1984 268.7
1985 279.31
1986 289.92
1987 293.1
1988 306.1
1989 319.63
1990 334.48
1991 354.91
1992 365.78
1993 376.39
1994 386.74
1995 397.08
1996 407.16
1997 420.69
1998 427.85
1999 434.75
2000 446.42
2001 461.54
2002 468.7
2003 479.84
2004 488.86
2005 504.77
2006 522.02
2007 535.28
2008 557.12
2009 557.63
2010 572.81
2011 581.38
2012 598.6
2013 609.02
2014 618.17
2015 622.84
2016 627.39
2017 640.4
2018 653.91
2019 666.4
2020 681.63
2021 690.91
Today 691.17