When did prices double after 1999?
By May 2026, prices were twice their 1999 average (CPI-U 166.6 → 333.2), 27 years later.
What $1 from 1999 is worth today
$1 in 1999 = $2.02 in September 2026
$1 from 1999$2.02in September 2026 dollars
Prices since 1999+102%CPI 166.6 → 336.9
Average a year2.62%compounded since 1999
Inflation in 19992.7%December to December
Worth in September 2026$202.28
Prices changed102.3%
Average a year2.62%
$100.00 in 1999 buys what $202.28 buys in September 2026.$100.00 × CPI 336.940 ÷ CPI 166.575 · a whole year uses its average CPI
BLS CPI-U, U.S. city average, not seasonally adjusted, through September 2026 (3.7% over 12 months). Source
1999 dollars in September 2026 dollars
| In 1999 | In September 2026 |
|---|---|
| $1.00 | $2.02 |
| $5.00 | $10.11 |
| $10.00 | $20.23 |
| $20.00 | $40.46 |
| $50.00 | $101.14 |
| $100.00 | $202.28 |
| $500.00 | $1,011 |
| $1,000 | $2,023 |
| $10,000 | $20,228 |
| $50,000 | $101,138 |
| $100,000 | $202,275 |
$100 from 1999, decade by decade
1999 in the inflation record
- Prices rose 2.7% in 1999 (December to December), below the 3.3% average of every year since 1914: #56 of 112 from highest to lowest.
- The 1990s averaged 2.9% a year; the decade’s highest was 1990 at 6.1%.
- Prices first stood at twice their 1999 level in May 2026.
- A dollar today buys what 49.4¢ bought in 1999.
CPI-U each month of 1999
| Month | CPI-U |
|---|---|
| January | 164.300 |
| February | 164.500 |
| March | 165.000 |
| April | 166.200 |
| May | 166.200 |
| June | 166.200 |
| July | 166.700 |
| August | 167.100 |
| September | 167.900 |
| October | 168.200 |
| November | 168.300 |
| December | 168.300 |
| Year average | 166.575 |
U.S. Bureau of Labor Statistics, CPI-U, U.S. city average, all items, not seasonally adjusted (1982-84 = 100). Source
Frequently asked questions
How much is $1 from 1999 worth today?
$2.02 in September 2026. Prices have risen 102.3% since 1999, using the 1999 average CPI-U of 166.575 and the September 2026 CPI-U of 336.940 from the U.S. Bureau of Labor Statistics.
What was the inflation rate in 1999?
Prices rose 2.7% from December 1998 to December 1999 (CPI-U, not seasonally adjusted).
What is the average inflation rate since 1999?
2.62% a year, compounded, from 1999 to September 2026. At that rate prices double about every 27 years.
How much is $100 from 1999 worth today?
$202.28. Multiply any 1999 amount by 2.023 to get today’s money.