CPI-U in 1984
The U.S. Consumer Price Index for All Urban Consumers (CPI-U) averaged 103.9 in 1984 (1982–84 = 100), 4.3% above the 1983 average. From December 1983 to December 1984, prices rose 3.9%. Prices in August 2026 were 3.22 times their 1984 level.
Monthly CPI-U index values, 1984
The highest monthly index in 1984 was 105.3 (December), the lowest 101.9 (January). The 12-month inflation rate ranged from +3.9% in December to +4.8% in March. Historical context — The Great Moderation (1983–2007): Inflation averaged about 3% a year with low volatility.
| Month | CPI-U index | Change from prior month | 12-month change |
|---|---|---|---|
| January 1984 | 101.9 | +0.6% | +4.2% |
| February 1984 | 102.4 | +0.5% | +4.6% |
| March 1984 | 102.6 | +0.2% | +4.8% |
| April 1984 | 103.1 | +0.5% | +4.6% |
| May 1984 | 103.4 | +0.3% | +4.2% |
| June 1984 | 103.7 | +0.3% | +4.2% |
| July 1984 | 104.1 | +0.4% | +4.2% |
| August 1984 | 104.5 | +0.4% | +4.3% |
| September 1984 | 105.0 | +0.5% | +4.3% |
| October 1984 | 105.3 | +0.3% | +4.3% |
| November 1984 | 105.3 | 0.0% | +4.1% |
| December 1984 | 105.3 | 0.0% | +3.9% |
CPI-U, U.S. city average, all items, not seasonally adjusted, 1982–84 = 100 (BLS series CUUR0000SA0). Before 2007 the BLS published the index to one decimal place. Annual average 103.9 as published by the BLS.
CPI 1984: common questions
What was the CPI in 1984?
The CPI-U annual average for 1984 was 103.9 on the 1982–84 = 100 base. Monthly values ranged from 101.9 to 105.3.
What was the inflation rate in 1984?
Measured by annual averages, consumer prices rose 4.3% in 1984; December to December the change was +3.9%.
How much is $100 from 1984 worth today?
About $322.41 in August 2026 prices, based on the change in CPI-U. Use the inflation calculator for other amounts.