UK inflation rate in 1800: 36.36%

UK Inflation Calculator


Inflation in 1800 and Its Effect on Pound Value

Purchasing power decreased by 36.36% in 1800 compared to 1799. On average, you would have to spend 36.36% more money in 1800 than in 1799 for the same item.

In other words, £1 in 1799 is equivalent in purchasing power to about £1.36 in 1800.

The 1799 inflation rate was 12.50%. The inflation rate in 1800 was 36.36%. The 1800 inflation rate is higher compared to the average inflation rate of 2.04% per year between 1800 and 2019.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1800 was 13.50. It was 9.90 in the previous year, 1799. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation.

Inflation from 1799 to 1800
Average inflation rate 36.36%
Converted amount (£1 base) £1.36
Price difference (£1 base) £0.36
CPI in 1799 9.900
CPI in 1800 13.500
Inflation in 1799 12.50%
Inflation in 1800 36.36%

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

How to Calculate Inflation Rate for £1, 1799 to 1800

This inflation calculator uses the following inflation rate formula:

CPI in 1800CPI in 1799
1799 GBP value
1800 GBP value

Then plug in historical CPI values. The UK CPI was 9.9 in the year 1799 and 13.5 in 1800:


£1 in 1799 has the same "purchasing power" or "buying power" as £1.36 in 1800.

To get the total inflation rate for the 1 years between 1799 and 1800, we use the following formula:

CPI in 1800 - CPI in 1799CPI in 1799
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

13.5 - 9.99.9

News headlines from 1799

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

  • The Rosetta stone is discovered in Egypt by French Captain Pierre-François Bouchard
  • A new tax is introduced in Britain, to raise money for the war against Napoleon.
  • The US government and Eli Whitney agree a contract for 10,000 muskets

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 1800 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 21 May. 2019,

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

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