$100 in 1921 is worth $612 in 1986,
because prices increased 512.3% over that period, an average of
2.83% a year.
$100 in 1921 has
the same buying power as
$612
in 1986
Detailed inflation statistics
Cumulative price change
512.3%
Average inflation rate
2.83% per year
Converted amount ($100 base)
$612
Price difference ($100 base)
$512
CPI in 1921
17.9
CPI in 1986
109.6
Inflation in 1921
-10.50%
Inflation in 1986
1.86%
$100 in 1921 → 1986
$612
$100 in 1986 → 1921
$16.33
What happened to prices between 1921 and 1986
Between 1921 and 1986, the Consumer Price Index went from 17.9 to 109.6.
Cumulatively, prices increased 512.3%, which works out to an average of
2.83% per year. Put differently, a dollar in 1921 bought what
$0.16 buys in 1986: the 1921 dollar
lost 83.7% of its purchasing power over
these 65 years.
Consumer prices fell 10.5% in 1921, the mirror image of the wartime
inflation that had more than doubled the cost of living between
1913 and 1920. The Depression of 1920-21, one
of the sharpest contractions in U.S. history, bottomed out that July
according to the National Bureau of Economic Research, even though it had
lasted barely eighteen months. Unemployment climbed toward one worker in ten
as businesses cut production and prices to work through wartime inventories,
but the same collapse in prices also meant the recovery, once it started,
had room to run without reigniting inflation. Warren Harding took office
March 4, promising a return to “normalcy” after a decade of war, pandemic,
labor unrest, and rapid price swings; his administration moved quickly to
cut top income tax rates and federal spending. Congress also acted on
immigration that year: the Emergency Quota Act, signed May 19, capped annual
arrivals from each country at 3% of that nationality’s population in the
1910 census, the first time the United States had set a numerical ceiling on
immigration. The law favored northern and western Europe and cut total
immigration by more than half compared with prewar levels; Congress
tightened the formula again in 1924. First-class postage held at 2 cents,
unchanged since mid-1919.
Every 1921 amount converts to 1986 at the same ratio, 6.12: $1,000 becomes
$6,123, and $10,000 becomes $61,229.
Amount in 1921
Value in 1986
$1.00
$6.12
$5.00
$30.61
$10.00
$61.23
$20.00
$122
$50.00
$306
$100
$612
$500
$3,061
$1,000
$6,123
$5,000
$30,615
$10,000
$61,229
$100,000
$612,291
$1,000,000
$6,122,905
Inflation by spending category, 1921–1986
Between 1921 and 1986, food rose the most, up 585.5%, while apparel rose the least, up 219.0%, against 512.3% for all items. The headline number is an average; here is what $100 of 1921
spending costs in 1986, by category:
Category
Avg. yearly inflation
$100 in 1921 →
All items (CPI-U)
2.83%
$612
Food
3.01%
$686
Apparel
1.80%
$319
Not shown because the BLS began these indexes after 1921: core (all items less food & energy) (1957–), energy (1957–), housing (1967–), medical care (1935–), transportation (1935–), recreation (1993–), education & communication (1993–).
Decade by decade: 1921 to 1986
Prices climbed fastest in the 1970s, averaging 7.82% a year, and fell in the 1930s (1.7% a year). Each step below chains into the full 1921–1986 change:
Years
Avg. yearly inflation
Price change
$100 from 1921, at end
1921–1930
-0.77%
-6.7%
$93.30
1930–1940
-1.75%
-16.2%
$78.21
1940–1950
5.58%
72.1%
$135
1950–1960
2.08%
22.8%
$165
1960–1970
2.74%
31.1%
$217
1970–1980
7.82%
112.4%
$460
1980–1986
4.87%
33.0%
$612
Year by year: CPI and the value of $100 from 1921
$100 from 1921 had already become $145 by
1951, on its way to $612 in 1986; each row shows the CPI, that
year's inflation rate, and the running value.
Within the span, inflation peaked at 14.4% in 1947, and prices fell 9.9% in 1932, the deepest deflation of the period.
Long periods are sampled every 5 years; the calculator above covers any pair of years.
The destination year: 1986
In 1986, prices rose 1.9% and $100 from 1921 had the buying
power of $612; the year's average CPI of 109.6 is the level
behind every 1986 figure on this page.
1986 delivered the decade’s biggest one-year drop in inflation, and it came
almost entirely from a single source: oil. Saudi Arabia abandoned its policy
of restraining output to prop up prices, and world crude collapsed from
about $27 a barrel to under $10 by midyear. Gasoline, which had averaged
$1.12 a gallon in 1985, fell to 86 cents. With energy costs plunging,
headline CPI inflation for the year came in at just 1.9%, the lowest annual
rate since 1965 and a striking bookend to 1980’s 13.5% peak. The relief was
uneven: prices for most goods and services outside energy kept rising at a
moderate pace, so households that didn’t drive much or heat with oil felt
less of the difference. In October, Congress passed the Tax Reform Act of
1986, a bipartisan overhaul that cut the top individual income tax rate from
50% to 28% while closing many deductions and shelters, the broadest rewrite
of the federal tax code since World War II. Between cheap gas and falling
interest rates, 1986 read like proof that the inflationary 1970s were a
closed chapter, six years after the U.S. economy had felt anything but
calm.
MLA: “Inflation from 1921 to 1986: $100 is worth $612 today.” InflationCalculator.com, U.S. Bureau of Labor Statistics CPI-U data, https://inflationcalculator.com/inflation/1921-to-1986/
APA: InflationCalculator.com. Inflation from 1921 to 1986. Based on U.S. Bureau of Labor Statistics CPI-U data. Retrieved from https://inflationcalculator.com/inflation/1921-to-1986/