U.S. inflation · 1918–1991
$100 in 1918 has the same buying power as
$902
in 1991
| Cumulative price change | 802.0% |
|---|---|
| Average inflation rate | 3.06% per year |
| Converted amount ($100 base) | $902 |
| Price difference ($100 base) | $802 |
| CPI in 1918 | 15.1 |
| CPI in 1991 | 136.2 |
| Inflation in 1918 | 17.97% |
| Inflation in 1991 | 4.21% |
| $100 in 1918 → 1991 | $902 |
| $100 in 1991 → 1918 | $11.09 |
Between 1918 and 1991, the Consumer Price Index went from 15.1 to 136.2. Cumulatively, prices increased 802.0%, which works out to an average of 3.06% per year. Put differently, a dollar in 1918 bought what $0.11 buys in 1991.
| Amount in 1918 | Value in 1991 |
|---|---|
| $1.00 | $9.02 |
| $5.00 | $45.10 |
| $10.00 | $90.20 |
| $20.00 | $180 |
| $50.00 | $451 |
| $100 | $902 |
| $500 | $4,510 |
| $1,000 | $9,020 |
| $5,000 | $45,099 |
| $10,000 | $90,199 |
| $100,000 | $901,987 |
| $1,000,000 | $9,019,868 |
The headline number is an average. Individual categories moved very differently over this period. Here is what $100 of 1918 spending costs in 1991, by category:
| Category | Avg. yearly inflation | $100 in 1918 → |
|---|---|---|
| All items (CPI-U) | 3.06% | $902 |
| Food | 2.92% | $816 |
| Apparel | 2.15% | $471 |
Not shown because the BLS began these indexes after 1918: 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 1918 |
|---|---|---|---|
| 1918 | 15.1 | 18.0% | $100 |
| 1923 | 17.1 | 1.8% | $113 |
| 1928 | 17.1 | -1.7% | $113 |
| 1933 | 13 | -5.1% | $86.09 |
| 1938 | 14.1 | -2.1% | $93.38 |
| 1943 | 17.3 | 6.1% | $115 |
| 1948 | 24.1 | 8.1% | $160 |
| 1953 | 26.7 | 0.8% | $177 |
| 1958 | 28.9 | 2.8% | $191 |
| 1963 | 30.6 | 1.3% | $203 |
| 1968 | 34.8 | 4.2% | $230 |
| 1973 | 44.4 | 6.2% | $294 |
| 1978 | 65.2 | 7.6% | $432 |
| 1983 | 99.6 | 3.2% | $660 |
| 1988 | 118.3 | 4.1% | $783 |
| 1991 | 136.2 | 4.2% | $902 |
Long periods are sampled every 5 years; the calculator above covers any pair of years.
MLA: “Inflation from 1918 to 1991: $100 is worth $902 today.” InflationCalculator.com, U.S. Bureau of Labor Statistics CPI-U data, https://inflationcalculator.com/inflation/1918-to-1991/
APA: InflationCalculator.com. Inflation from 1918 to 1991. Based on U.S. Bureau of Labor Statistics CPI-U data. Retrieved from https://inflationcalculator.com/inflation/1918-to-1991/
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.