UK inflation rate in 1799: 12.50%

UK Inflation Calculator


Inflation in 1799 and Its Effect on Pound Value

Purchasing power decreased by 12.50% in 1799 compared to 1798. On average, you would have to spend 12.50% more money in 1799 than in 1798 for the same item.

In other words, £1 in 1798 is equivalent in purchasing power to about £1.13 in 1799.

The 1798 inflation rate was -2.22%. The inflation rate in 1799 was 12.50%. The 1799 inflation rate is higher compared to the average inflation rate of 2.17% per year between 1799 and 2019.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1799 was 9.90. It was 8.80 in the previous year, 1798. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation.

Inflation from 1798 to 1799
Average inflation rate 12.50%
Converted amount (£1 base) £1.13
Price difference (£1 base) £0.13
CPI in 1798 8.800
CPI in 1799 9.900
Inflation in 1798 -2.22%
Inflation in 1799 12.50%

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

How to Calculate Inflation Rate for £1, 1798 to 1799

This inflation calculator uses the following inflation rate formula:

CPI in 1799CPI in 1798
1798 GBP value
1799 GBP value

Then plug in historical CPI values. The UK CPI was 8.8 in the year 1798 and 9.9 in 1799:


£1 in 1798 has the same "purchasing power" or "buying power" as £1.13 in 1799.

To get the total inflation rate for the 1 years between 1798 and 1799, we use the following formula:

CPI in 1799 - CPI in 1798CPI in 1798
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

9.9 - 8.88.8

News headlines from 1798

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

  • Congress passes the Prohibition of "false, scandalous and malicious" writing against government in the US Sedition Act.
  • Rome is invaded, and subsequently proclaimed a Roman Republic by Louis Alexande Berthier. Pope Pius VI was taken prisoner during the invasion.
  • The Republic of Switzerland is formed.

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 1799 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 24 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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