1870 Inflation CalculatorWhat 1870 dollars are worth today
$1 in 1870 has about the same buying power as $25.48 in 2025 — a total price increase of 2447.8% over 155 years, averaging 2.11% a year.
$100,000 in 1870 is worth about $2,547,751 in 2025 dollars.
Convert any 1870 amount
$100 in 1870 is worth about $2,548 in 2025 dollars (estimate).
Calculated as amount × 25.4775, the change in the price index from 1870 to 2025.
1870 dollar amounts in 2025 money
Each amount multiplied by 25.4775.
The method
Index values are annual averages on the 1982-1984 = 100 base.
Frequently asked questions
What is $1 from 1870 worth today?
$1 in 1870 has roughly the same buying power as $25.48 in 2025. Prices rose 2447.8% in total over those 155 years, an average of 2.11% per year.
How do I convert 1870 dollars to today's dollars?
Multiply the 1870 amount by 25.4775. That figure is the price index in 2025 divided by the index in 1870 (322.8 ÷ 12.67).
What was the inflation rate in 1870?
Consumer prices changed by -5.0% during 1870 compared with the previous year.
Is 1870 inflation data official?
No. Official US Consumer Price Index data begins in 1913. Figures for 1870 come from a reconstructed historical series published by the Federal Reserve Bank of Minneapolis, which splices together earlier price indices. They are reasonable estimates for historical context, but they are not official statistics and carry meaningfully more uncertainty than post-1913 figures.