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$100 in 1984 is worth $329 today

$100 in January 1984 had the same buying power as $329 in Aug 2026. Prices have risen 229% since then. Change the amount or the months below.

US CPI data through Aug 2026, updated monthly. How we calculate
From
To

$100 in Jan 1984 is worth, in Aug 2026

$328.73

Prices rose 228.7% in total, about 2.83% a year. Cash kept under the mattress since Jan 1984 now buys only 30% of what it used to.

228.7%Total inflation
2.83%Average per year
30%Buying power left in cash
$0$100$200$300$400Jan 1984Jan 1990Jan 1996Jan 2002Jan 2008Jan 2014Jan 2020Jan 2026
Cost of what $100 bought in Jan 1984

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 1984 is worth now

$329Same buying power today
229%Price rise since 1984
2.8%Average inflation a year
30%Buying power left in cash

Prices in the US have risen 229% since 1984, so it takes $329 today to buy what $100 bought then. Put the other way, $100 kept in cash since 1984 now buys only 30% of what it did.

That is an average of 2.8% a year over 43 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 1984, with dividends reinvested, would be worth about $11,695 today, 36× what inflation alone requires. Cash loses buying power; invested money has historically outgrown it.

$100 from 1984 in later years
YearSame buying power
1984$100
1990$125
2000$166
2010$213
2020$253
Aug 2026$329

CPI in January of each year; the last row uses the latest month.

Other years

$1 in 1984$100 in 1984
$100 in 1920$100 in 1930$100 in 1940$100 in 1950$100 in 1960$100 in 1970$100 in 1980$100 in 1981$100 in 1982$100 in 1983$100 in 1985$100 in 1986$100 in 1987$100 in 1988$100 in 1990$100 in 2000$100 in 2010$100 in 2020

Common questions

How much is $100 from 1984 worth today?

About $329 in Aug 2026 dollars, based on the US Consumer Price Index (CPI-U) from January 1984.

How much have prices gone up since 1984?

229% in total, or about 2.8% a year on average.

What would $100 in 1984 buy today?

It buys about 30% of what it bought in 1984. You would need $329 to buy the same things.

How is this calculated?

Today's value = $100 × (latest CPI ÷ CPI in January 1984). 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.

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