$100 in 2018 is worth $135 today
$100 in January 2018 had the same buying power as $135 in Aug 2026. Prices have risen 35% since then. Change the amount or the months below.
US CPI data through Aug 2026, updated monthly. How we calculate$100 in Jan 2018 is worth, in Aug 2026
Prices rose 35.1% in total, about 3.57% a year. Cash kept under the mattress since Jan 2018 now buys only 74% of what it used to.
US Consumer Price Index (CPI-U, all items, not seasonally adjusted), Bureau of Labor Statistics. Data through Aug 2026. Oct 2025 was not published and is estimated from the months around it.
What $100 from 2018 is worth now
Prices in the US have risen 35% since 2018, so it takes $135 today to buy what $100 bought then. Put the other way, $100 kept in cash since 2018 now buys only 74% of what it did.
That is an average of 3.6% a year over 9 years. Inflation was mostly moderate, around 2% to 3% a year, until the jump of 2021 and 2022.
For contrast, $100 put into the S&P 500 in January 2018, with dividends reinvested, would be worth about $314 today, 2.3× what inflation alone requires. Cash loses buying power; invested money has historically outgrown it.
| Year | Same buying power |
|---|---|
| 2018 | $100 |
| 2020 | $104 |
| Aug 2026 | $135 |
CPI in January of each year; the last row uses the latest month.
Other years
Common questions
How much is $100 from 2018 worth today?
About $135 in Aug 2026 dollars, based on the US Consumer Price Index (CPI-U) from January 2018.
How much have prices gone up since 2018?
35% in total, or about 3.6% a year on average.
What would $100 in 2018 buy today?
It buys about 74% of what it bought in 2018. You would need $135 to buy the same things.
How is this calculated?
Today's value = $100 × (latest CPI ÷ CPI in January 2018). CPI is the Bureau of Labor Statistics measure of the prices US households pay.
Based on the US Consumer Price Index for All Urban Consumers (CPI-U), all items, from the Bureau of Labor Statistics. Individual prices, such as homes, college or healthcare, rose faster or slower than the average.
Get one chart like this every week
- 1chart from real data
- 1idea in plain English
- 1thing to do this week