U.S. inflation · 1921–1990
$100 in 1921 has the same buying power as
$730
in 1990
| Cumulative price change | 630.2% |
|---|---|
| Average inflation rate | 2.92% per year |
| Converted amount ($100 base) | $730 |
| Price difference ($100 base) | $630 |
| CPI in 1921 | 17.9 |
| CPI in 1990 | 130.7 |
| Inflation in 1921 | -10.50% |
| Inflation in 1990 | 5.40% |
| $100 in 1921 → 1990 | $730 |
| $100 in 1990 → 1921 | $13.70 |
Between 1921 and 1990, the Consumer Price Index went from 17.9 to 130.7. Cumulatively, prices increased 630.2%, which works out to an average of 2.92% per year. Put differently, a dollar in 1921 bought what $0.14 buys in 1990.
| Amount in 1921 | Value in 1990 |
|---|---|
| $1.00 | $7.30 |
| $5.00 | $36.51 |
| $10.00 | $73.02 |
| $20.00 | $146 |
| $50.00 | $365 |
| $100 | $730 |
| $500 | $3,651 |
| $1,000 | $7,302 |
| $5,000 | $36,508 |
| $10,000 | $73,017 |
| $100,000 | $730,168 |
| $1,000,000 | $7,301,676 |
The headline number is an average. Individual categories moved very differently over this period. Here is what $100 of 1921 spending costs in 1990, by category:
| Category | Avg. yearly inflation | $100 in 1921 → |
|---|---|---|
| All items (CPI-U) | 2.92% | $730 |
| Food | 3.12% | $833 |
| Apparel | 1.93% | $374 |
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–).
| Year | CPI | Inflation rate | $100 from 1921 |
|---|---|---|---|
| 1921 | 17.9 | -10.5% | $100 |
| 1926 | 17.7 | 1.1% | $98.88 |
| 1931 | 15.2 | -9.0% | $84.92 |
| 1936 | 13.9 | 1.5% | $77.65 |
| 1941 | 14.7 | 5.0% | $82.12 |
| 1946 | 19.5 | 8.3% | $109 |
| 1951 | 26 | 7.9% | $145 |
| 1956 | 27.2 | 1.5% | $152 |
| 1961 | 29.9 | 1.0% | $167 |
| 1966 | 32.4 | 2.9% | $181 |
| 1971 | 40.5 | 4.4% | $226 |
| 1976 | 56.9 | 5.8% | $318 |
| 1981 | 90.9 | 10.3% | $508 |
| 1986 | 109.6 | 1.9% | $612 |
| 1990 | 130.7 | 5.4% | $730 |
Long periods are sampled every 5 years; the calculator above covers any pair of years.
In 1990, the median U.S. household earned about $29,900, gas averaged $1.15 a gallon, and mailing a letter cost a quarter. Inflation ran hot at 5.4% for the year, its highest rate since 1982, pushed up by an oil shock after Iraq’s invasion of Kuwait, and the economy tipped into recession that summer. It was the last gasp of elevated inflation before the long calm of the 1990s.
MLA: “Inflation from 1921 to 1990: $100 is worth $730 today.” InflationCalculator.com, U.S. Bureau of Labor Statistics CPI-U data, https://inflationcalculator.com/inflation/1921-to-1990/
APA: InflationCalculator.com. Inflation from 1921 to 1990. Based on U.S. Bureau of Labor Statistics CPI-U data. Retrieved from https://inflationcalculator.com/inflation/1921-to-1990/
Source: U.S. Bureau of Labor Statistics, CPI-U annual averages (series CUUR0000SA0; category indexes listed on the data sources page). See how these numbers are calculated.