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Lately, inflation has been somewhat subdued. For example, from 2002-2012 it averaged 2.5%/year. Suppose that for the next 20 years inflation only averaged 2% (the green line). In that case, twenty years from now your $10,000 would be equivalent to $6,730 in today's dollars.

Value of $20 from 2000 to 2021$20 in 2000 is equivalent in purchasing power to about $30.25 today, an increase of $10.25 over 21 years. The dollar had an average inflation rate of 1.99% per year between 2000 and today, producing a cumulative price increase of 51.26%.

After 10 years of adding the inflation-adjusted $1,000 a year, our hypothetical investor would have accumulated $16,187. Not enough to knock anybody's socks off. But after 20 years of this, the account would be worth $118,874.

$1,000 in 1800 is worth $20,672.54 today$1,000 in 1800 is equivalent in purchasing power to about $20,672.54 today, an increase of $19,672.54 over 221 years. The dollar had an average inflation rate of 1.38% per year between 1800 and today, producing a cumulative price increase of 1,967.25%.

$1,000 in 1791 is worth $27,710.00 today$1,000 in 1791 is equivalent in purchasing power to about $27,710.00 today, an increase of $26,710.00 over 230 years. The dollar had an average inflation rate of 1.45% per year between 1791 and today, producing a cumulative price increase of 2,671.00%.

$1,000 in 1790 is equivalent in purchasing power to about $28,312.39 today, an increase of $27,312.39 over 231 years. The dollar had an average inflation rate of 1.46% per year between 1790 and today, producing a cumulative price increase of 2,731.24%.

Plug your numbers into the inflation rate formula. Subtract the past date CPI from the current date CPI and divide your answer by the past date CPI. Afterward, multiply the results by 100 to get a percentage. Your answer will be the inflation rate you're interested in.

To get there in 20 years, an investor would need to make monthly contributions of about $1,150. So it's not impossible to start with $100,000 and end up with $1 million but it's going to take some time, and you have to keep saving.

How much will an investment of $1,000,000 be worth in the future? At the end of 20 years, your savings will have grown to $3,207,135.

U.S. Future Inflation Calculator $100 in 2021 is equivalent in purchasing power to about $112.55 in 2025, an increase of $12.55 over 4 years. The dollar had an average inflation rate of 3.00% per year between 2021 and 2025, producing a cumulative price increase of 12.55%.