Value of 1975 US Dollars today

$100 in 1975

$487.26 in 2018

The inflation rate in the United States between 1975 and today has been 387.26%, which translates into a total increase of $387.26. This means that 100 dollars in 1975 are equivalent to 487.26 dollars in 2018. In other words, the purchasing power of $100 in 1975 equals $487.26 today. The average annual inflation rate has been 3.66%.

Inflation timeline in the United States (1975-2018)

The following chart ilustrates the equivalence of $100 throughout the years due to inflation and CPI changes. All values are equivalent in terms of purchashing 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 (1975-2018) 375%
Total Inflation* 387.26%
Annual inflation avg. (1975-2018) 3.69%
Annual inflation avg.* 3.66%
CPI 1975 21.9
CPI 2018 104.01
CPI today* 106.7
$1 in 1975 $4.75 in 2018

* 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 in 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 43 years between 1975 and 2018 and the average inflation rate has been 3.6647%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = $100 * (1 + 0.04)43 = $475

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 1975 was 21.9 and the CPI today is 106.7. Therefore,

Final value = Initial value *
CPI final/CPI initial
= $100 *
104.01/21.9
= $475

USA inflation - Conversion table

Initial Value Equivalent value
$1 dollar in 1975 $4.87 dollars today
$5 dollars in 1975 $24.36 dollars today
$10 dollars in 1975 $48.73 dollars today
$50 dollars in 1975 $243.63 dollars today
$100 dollars in 1975 $487.26 dollars today
$500 dollars in 1975 $2,436.3 dollars today
$1,000 dollars in 1975 $4,872.6 dollars today
$5,000 dollars in 1975 $24,363.02 dollars today
$10,000 dollars in 1975 $48,726.04 dollars today
$50,000 dollars in 1975 $243,630.2 dollars today
$100,000 dollars in 1975 $487,260.4 dollars today
$500,000 dollars in 1975 $2,436,302.02 dollars today
$1,000,000 dollars in 1975 $4,872,604.03 dollars today

Value of Dollar in time (by year)

Period Value
1975 100
1976 106.94
1977 112.14
1978 119.65
1979 130.44
1980 147.78
1981 166.28
1982 181.12
1983 188.05
1984 195.18
1985 202.89
1986 210.6
1987 212.91
1988 222.35
1989 232.18
1990 242.97
1991 257.8
1992 265.7
1993 273.41
1994 280.92
1995 288.44
1996 295.76
1997 305.59
1998 310.79
1999 315.8
2000 324.28
2001 335.26
2002 340.46
2003 348.55
2004 355.11
2005 366.67
2006 379.19
2007 388.82
2008 404.69
2009 405.06
2010 416.09
2011 422.31
2012 434.82
2013 442.39
2014 449.03
2015 452.43
2016 455.73
2017 465.19
2018 475
Today 487.26