U.S. inflation · 1918–1940
$100 in 1918 has the same buying power as
$92.72
in 1940
| Cumulative price change | -7.3% |
|---|---|
| Average inflation rate | -0.34% per year |
| Converted amount ($100 base) | $92.72 |
| Price difference ($100 base) | -$7.28 |
| CPI in 1918 | 15.1 |
| CPI in 1940 | 14 |
| Inflation in 1918 | 17.97% |
| Inflation in 1940 | 0.72% |
| $100 in 1918 → 1940 | $92.72 |
| $100 in 1940 → 1918 | $108 |
Between 1918 and 1940, the Consumer Price Index went from 15.1 to 14. Cumulatively, prices declined 7.3%, which works out to an average of -0.34% per year. Put differently, a dollar in 1918 bought what $1.08 buys in 1940.
| Amount in 1918 | Value in 1940 |
|---|---|
| $1.00 | $0.93 |
| $5.00 | $4.64 |
| $10.00 | $9.27 |
| $20.00 | $18.54 |
| $50.00 | $46.36 |
| $100 | $92.72 |
| $500 | $464 |
| $1,000 | $927 |
| $5,000 | $4,636 |
| $10,000 | $9,272 |
| $100,000 | $92,715 |
| $1,000,000 | $927,152 |
The headline number is an average. Individual categories moved very differently over this period. Here is what $100 of 1918 spending costs in 1940, by category:
| Category | Avg. yearly inflation | $100 in 1918 → |
|---|---|---|
| All items (CPI-U) | -0.34% | $92.72 |
| Apparel | -1.02% | $79.85 |
| Food | -1.49% | $71.86 |
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 |
| 1919 | 17.3 | 14.6% | $115 |
| 1920 | 20 | 15.6% | $132 |
| 1921 | 17.9 | -10.5% | $119 |
| 1922 | 16.8 | -6.1% | $111 |
| 1923 | 17.1 | 1.8% | $113 |
| 1924 | 17.1 | 0.0% | $113 |
| 1925 | 17.5 | 2.3% | $116 |
| 1926 | 17.7 | 1.1% | $117 |
| 1927 | 17.4 | -1.7% | $115 |
| 1928 | 17.1 | -1.7% | $113 |
| 1929 | 17.1 | 0.0% | $113 |
| 1930 | 16.7 | -2.3% | $111 |
| 1931 | 15.2 | -9.0% | $101 |
| 1932 | 13.7 | -9.9% | $90.73 |
| 1933 | 13 | -5.1% | $86.09 |
| 1934 | 13.4 | 3.1% | $88.74 |
| 1935 | 13.7 | 2.2% | $90.73 |
| 1936 | 13.9 | 1.5% | $92.05 |
| 1937 | 14.4 | 3.6% | $95.36 |
| 1938 | 14.1 | -2.1% | $93.38 |
| 1939 | 13.9 | -1.4% | $92.05 |
| 1940 | 14 | 0.7% | $92.72 |
MLA: “Inflation from 1918 to 1940: $100 is worth $92.72 today.” InflationCalculator.com, U.S. Bureau of Labor Statistics CPI-U data, https://inflationcalculator.com/inflation/1918-to-1940/
APA: InflationCalculator.com. Inflation from 1918 to 1940. Based on U.S. Bureau of Labor Statistics CPI-U data. Retrieved from https://inflationcalculator.com/inflation/1918-to-1940/
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.