$1 in 1805 is equivalent in purchasing power to about $1 in 1820, an increase of $0.00 over 15 years. The dollar had an average inflation rate of 0.00% per year between 1805 and 1820, producing a cumulative price increase of 0.00%.

The 1805 inflation rate was -0.85%. The inflation rate in 1820 was -7.87%. The 1820 inflation rate is lower compared to the average inflation rate of 1.59% per year between 1820 and 2021.

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Average inflation rate | 0.00% |

Converted amount ($1 base) | $1 |

Price difference ($1 base) | $0.00 |

CPI in 1805 | 11.700 |

CPI in 1820 | 11.700 |

Inflation in 1805 | -0.85% |

Inflation in 1820 | -7.87% |

$1 in 1805 | $1 in 1820 |

This chart shows a calculation of buying power equivalence for $1 in 1805 (price index tracking began in 1635).

For example, if you started with $1, you would need to end with $1 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When $1 is equivalent to $1 over time, that means that the "real value" of a single U.S. dollar decreases over time. In other words, a dollar will pay for fewer items at the store.

This effect explains how inflation erodes the value of a dollar over time. By calculating the value in 1805 dollars, the chart below shows how $1 is worth less over 15 years.

According to the Bureau of Labor Statistics, each of these USD amounts below is equal in terms of what it could buy at the time:

This conversion table shows various other 1805 amounts in 1820 dollars, based on the 0.00% change in prices:

Initial value | Equivalent value |
---|---|

$1 dollar in 1805 | $1.00 dollars in 1820 |

$5 dollars in 1805 | $5.00 dollars in 1820 |

$10 dollars in 1805 | $10.00 dollars in 1820 |

$50 dollars in 1805 | $50.00 dollars in 1820 |

$100 dollars in 1805 | $100.00 dollars in 1820 |

$500 dollars in 1805 | $500.00 dollars in 1820 |

$1,000 dollars in 1805 | $1,000.00 dollars in 1820 |

$5,000 dollars in 1805 | $5,000.00 dollars in 1820 |

$10,000 dollars in 1805 | $10,000.00 dollars in 1820 |

$50,000 dollars in 1805 | $50,000.00 dollars in 1820 |

$100,000 dollars in 1805 | $100,000.00 dollars in 1820 |

$500,000 dollars in 1805 | $500,000.00 dollars in 1820 |

$1,000,000 dollars in 1805 | $1,000,000.00 dollars in 1820 |

Inflation can also vary widely by country. For comparison, in the UK £1.00 in 1805 would be equivalent to £0.89 in 1820, an absolute change of £-0.11 and a cumulative change of -10.69%.

Compare these numbers to the US's overall absolute change of $0.00 and total percent change of 0.00%.

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 1805 and 1820.

Compare these values to the overall average of 0.00% per year:

Category | Avg Inflation (%) | Total Inflation (%) | $1 in 1805 → 1820 |
---|---|---|---|

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 |

The graph below compares inflation in categories of goods over time. Click on a category such as "Food" to toggle it on or off:

For all these visualizations, it's important to note that not all categories may have been tracked since 1805. 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 1805 and 1820:

CPI in 1820
CPI in 1805

×

1805 USD value

=

1820 USD value

Then plug in historical CPI values. The U.S. CPI was 11.7 in the year 1805 and 11.7 in 1820:

11.711.7

×

$1

=

$1 in 1805 has the same "purchasing power" or "buying power" as $1 in 1820.

To get the total inflation rate for the 15 years between 1805 and 1820, we use the following formula:

CPI in 1820 - CPI in 1805CPI in 1805

×

100

=

Plugging in the values to this equation, we get:

11.7 - 11.711.7

×

100

=

Politics and news often influence economic performance. Here's what was happening at the time:

- The British navy, led by Admiral Horatio Nelson, defeat the French and Spanish fleet in the Battle of Trafalgar. Admiral Nelson is killed during battle.
- The American West is crossed for the first time when an expedition, led by Lewis Clark, reaches the Pacific Ocean
- The Rocky Mountains are seen for the first time by Lewis and Clark on their expedition.

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: “$1 in 1805 → 1820 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 2 Dec. 2021, https://www.officialdata.org/us/inflation/1805?amount=1&endYear=1820.

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 | 0.00% |

Converted amount ($1 base) | $1 |

Price difference ($1 base) | $0.00 |

CPI in 1805 | 11.700 |

CPI in 1820 | 11.700 |

Inflation in 1805 | -0.85% |

Inflation in 1820 | -7.87% |

$1 in 1805 | $1 in 1820 |