UK inflation rate in 1809: 9.38%

UK Inflation Calculator


Inflation in 1809 and Its Effect on Pound Value

Purchasing power decreased by 9.38% in 1809 compared to 1808. On average, you would have to spend 9.38% more money in 1809 than in 1808 for the same item.

In other words, £1 in 1808 is equivalent in purchasing power to about £1.09 in 1809.

The 1808 inflation rate was 4.07%. The inflation rate in 1809 was 9.37%. The 1809 inflation rate is higher compared to the average inflation rate of 2.11% per year between 1809 and 2019.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1809 was 14.00. It was 12.80 in the previous year, 1808. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation.

Inflation from 1808 to 1809
Average inflation rate 9.38%
Converted amount (£1 base) £1.09
Price difference (£1 base) £0.09
CPI in 1808 12.800
CPI in 1809 14.000
Inflation in 1808 4.07%
Inflation in 1809 9.37%

UK inflation chart from 1988 to 2017. Based on the UK Consumer Price Index.

How to Calculate Inflation Rate for £1, 1808 to 1809

This inflation calculator uses the following inflation rate formula:

CPI in 1809CPI in 1808
1808 GBP value
1809 GBP value

Then plug in historical CPI values. The UK CPI was 12.8 in the year 1808 and 14 in 1809:


£1 in 1808 has the same "purchasing power" or "buying power" as £1.09 in 1809.

To get the total inflation rate for the 1 years between 1808 and 1809, we use the following formula:

CPI in 1809 - CPI in 1808CPI in 1808
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

14 - 12.812.8

News headlines from 1808

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

  • African Benefolnt Society is formed.
  • The US Congress prohibits the importing of slaves.
  • Herman Daendels becomes the Governor General of the Dutch East Indies.

Data Source & Citation

Raw data for these calculations comes from the composite price index published by the UK Office for National Statistics (ONS). A composite index is created by combining price data from several different published sources, both official and unofficial. The Consumer Price Index, normally used to compute inflation, has only been tracked since 1988. All inflation calculations after 1988 use the Office for National Statistics' Consumer Price Index, except for 2017, which is based on The Bank of England's forecast.

You may use the following MLA citation for this page: “Inflation Rate in 1809 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 19 Apr. 2019,

Special thanks to QuickChart for providing downloadable chart images. is a reference website maintained by the Official Data Foundation.

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