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# U.S. inflation rate in 1645: -12.00%

### Inflation in 1645 and Its Effect on Dollar Value

Purchasing power increased by 12.00% in 1645 compared to 1644. On average, you would have to spend 12.00% less money in 1645 than in 1644 for the same item. This is an example of deflation.

In other words, \$1 in 1644 is equivalent in purchasing power to about \$0.88 in 1645.

The 1644 inflation rate was -28.06%. The inflation rate in 1645 was -12.00%. The 1645 inflation rate is lower compared to the average inflation rate of 0.90% per year between 1645 and 2020.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1645 was 8.80. It was 10.00 in the previous year, 1644. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation. Because the 1645 CPI is less than 1644 CPI, negative inflation (also known as deflation) has occurred.

 Average inflation rate -12.00% Converted amount (\$1 base) \$0.88 Price difference (\$1 base) \$-0.12 CPI in 1644 10.000 CPI in 1645 8.800 Inflation in 1644 -28.06% Inflation in 1645 -12.00%

USD Inflation since 1635
Annual Rate, the Bureau of Labor Statistics CPI

### Inflation by Spending Category

CPI is the weighted combination of many categories of spending that are tracked by the government. This chart shows the average rate of inflation for select CPI categories between 1644 and 1645.

Compare these values to the overall average of -12.00% per year:

Category Avg Inflation (%) Total Inflation (%) \$1 in 1644 → 1645
Food and beverages 0.00 0.00 1.00
Housing 0.00 0.00 1.00
Apparel 0.00 0.00 1.00
Transportation 0.00 0.00 1.00
Medical care 0.00 0.00 1.00
Recreation 0.00 0.00 1.00
Education and communication 0.00 0.00 1.00
Other goods and services 0.00 0.00 1.00

For all these visualizations, it's important to note that not all categories may have been tracked since 1644. This table and charts use the earliest available data for each category.

### How to Calculate Inflation Rate for \$1, 1644 to 1645

This inflation calculator uses the following inflation rate formula:

CPI in 1645CPI in 1644
×
1644 USD value
=
1645 USD value

Then plug in historical CPI values. The U.S. CPI was 10 in the year 1644 and 8.8 in 1645:

8.810
×
\$1
=
\$0.88

\$1 in 1644 has the same "purchasing power" or "buying power" as \$0.88 in 1645.

To get the total inflation rate for the 1 years between 1644 and 1645, we use the following formula:

CPI in 1645 - CPI in 1644CPI in 1644
×
100
=
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

8.8 - 1010
×
100
=
-12%

### Data Source & Citation

Raw data for these calculations comes from the Bureau of Labor Statistics' (CPI), established in 1913. Inflation data from 1665 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University.

You may use the following MLA citation for this page: “Inflation Rate in 1645 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 23 Jan. 2020, https://www.officialdata.org/inflation-rate-in-1645.