UK inflation rate in 1805: 15.93%

UK Inflation Calculator


Inflation in 1805 and Its Effect on Pound Value

Purchasing power decreased by 15.93% in 1805 compared to the previous year, 1804. On average, you would have to spend 15.93% more money in 1805 than in 1804 for the same item.

In other words, £1 in 1804 is equivalent in purchasing power to £1.16 in 1805.

The 1804 inflation rate was 2.73%. The inflation rate in 1805 was 15.93%. The 1805 inflation rate is higher compared to the average inflation rate of 2.10% per year between 1805 and 2018.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1805 was 13.1. It was 11.3 in the previous year, 1804. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation.

Inflation from 1804 to 1805
Average inflation rate 15.93%
Converted amount (£1 base) £1.16
Price difference (£1 base) £0.16
CPI in 1804 11.300
CPI in 1805 13.100
Inflation in 1804 2.73%
Inflation in 1805 15.93%

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

How to Calculate Inflation Rate for £1, 1804 to 1805

This inflation calculator uses the following inflation rate formula:

CPI in 1805CPI in 1804
1804 GBP value
1805 GBP value

Then plug in historical CPI values. The UK CPI was 11.3 in the year 1804 and 13.1 in 1805:


£1 in 1804 has the same "purchasing power" or "buying power" as £1.16 in 1805.

To get the total inflation rate for the 1 years between 1804 and 1805, we use the following formula:

CPI in 1805 - CPI in 1804CPI in 1804
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

13.1 - 11.311.3

News headlines from 1804

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

  • France adopts Napoleon’s Civil Code.
  • The French Senate proclaims Napoleon Bonaparte Emperor of France
  • Napoleon is crowned Emperor of France

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 1805 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 19 Dec. 2018,

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