$1 in 1645 is equivalent in purchasing power to about $0.63 in 1646.
The dollar had an average **deflation** rate of -37.50% per year since 1645, producing a cumulative price change of -37.50%.
Purchasing power *increased* by 37.50% in 1646 compared to 1645. On average, you would have to spend 37.50% *less* money in 1646 than in 1645 for the same item.
This is an example of **deflation**.

This means that prices in 1646 are 37.5% lower than average prices since 1645, according to the Bureau of Labor Statistics consumer price index.

The 1645 inflation rate was -12.00%. The inflation rate in 1646 was -37.50%. The 1646 inflation rate is lower compared to the average inflation rate of 1.05% per year between 1646 and 2021.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1646 was 5.50. It was 8.80 in the previous year, 1645. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation. Because the 1646 CPI is less than 1645 CPI, negative inflation (also known as deflation) has occurred.

⌃

Average inflation rate | -37.50% |

Converted amount ($1 base) | $0.63 |

Price difference ($1 base) | $-0.37 |

CPI in 1645 | 8.800 |

CPI in 1646 | 5.500 |

Inflation in 1645 | -12.00% |

Inflation in 1646 | -37.50% |

$1 in 1645 | $0.63 in 1646 |

CPI is the weighted combination of many categories of spending that are tracked by the government. Breaking down these categories helps explain the main drivers behind price changes. This chart shows the average rate of inflation for select CPI categories between 1645 and 1646.

Compare these values to the overall average of -37.50% per year:

Category | Avg Inflation (%) | Total Inflation (%) | $1 in 1645 → 1646 |
---|---|---|---|

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 1645. This table and charts use the earliest available data for each category.

Our calculations use the following inflation rate formula to calculate the change in value between 1645 and 1646:

CPI in 1646
CPI in 1645

×

1645 USD value

=

1646 USD value

Then plug in historical CPI values. The U.S. CPI was 8.8 in the year 1645 and 5.5 in 1646:

5.58.8

×

$1

=

$1 in 1645 has the same "purchasing power" or "buying power" as $0.63 in 1646.

To get the total inflation rate for the 1 years between 1645 and 1646, we use the following formula:

CPI in 1646 - CPI in 1645CPI in 1645

×

100

=

Plugging in the values to this equation, we get:

5.5 - 8.88.8

×

100

=

Raw data for these calculations comes from the Bureau of Labor Statistics' Consumer Price Index (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 1646 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 27 Sep. 2021, https://www.officialdata.org/inflation-rate-in-1646.

Special thanks to QuickChart for their chart image API, which is used for chart downloads.

in2013dollars.com is a reference website maintained by the Official Data Foundation.

Average inflation rate | -37.50% |

Converted amount ($1 base) | $0.63 |

Price difference ($1 base) | $-0.37 |

CPI in 1645 | 8.800 |

CPI in 1646 | 5.500 |

Inflation in 1645 | -12.00% |

Inflation in 1646 | -37.50% |

$1 in 1645 | $0.63 in 1646 |