How much is $100 in 1921 worth today?

$100 in 1921 is worth $1,871.40 in August 2026 dollars, according to the U.S. Consumer Price Index.

How much would I need today to match $100 in 1921?

You would need $1,871.40 to buy what $100 bought in 1921. That is 18.71 times as much.

Kept as cash, $100 from 1921 buys only what $5.34 of 1921 money bought. It has lost 95% of its buying power.

Prices rose -10.5% in 1921. Since then the average has been 2.83% a year.

$100 in 1921 has the same buying power as

$1,871.40 in August 2026

That is 1,771% more, an average inflation rate of 2.83% a year over 105 years.

Put the other way, $100 today buys what $5.34 bought in 1921. Cash kept under the mattress since 1921 has lost 95% of its value.

$100 from 1921 in each later year's dollars

Not everything rose at the same pace. What $100 spent on each of these in 1921 costs today:

Amount ($) From year From month To year To month

$100.00 in 1921 has the same buying power as

$1,871.40 in August 2026

Prices rose 1,771.4% in total, an average of 2.83% a year.

How much is $100 in 1921 worth today?: $100 in 1921 is worth $1,871.40 in August 2026 dollars, according to the U.S. Consumer Price Index.
How much would I need today to match $100 in 1921?: You would need $1,871.40 to buy what $100 bought in 1921. That is 18.71 times as much.
How much buying power has $100 lost since 1921?: Kept as cash, $100 from 1921 buys only what $5.34 of 1921 money bought. It has lost 95% of its buying power.
What was inflation in 1921?: Prices rose -10.5% in 1921. Since then the average has been 2.83% a year.