UK inflation rate in 1930: -2.81%

UK Inflation Calculator


Inflation in 1930 and Its Effect on Pound Value

Purchasing power increased by 2.81% in 1930 compared to 1929. On average, you would have to spend 2.81% less money in 1930 than in 1929 for the same item. This is an example of deflation.

In other words, £1 in 1929 is equivalent in purchasing power to about £0.97 in 1930.

The 1929 inflation rate was -1.11%. The inflation rate in 1930 was -2.81%. The 1930 inflation rate is lower compared to the average inflation rate of 4.80% per year between 1930 and 2019.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1930 was 17.30. It was 17.80 in the previous year, 1929. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation. Because the 1930 CPI is less than 1929 CPI, negative inflation (also known as deflation) has occurred.

Inflation from 1929 to 1930
Average inflation rate -2.81%
Converted amount (£1 base) £0.97
Price difference (£1 base) £-0.03
CPI in 1929 17.800
CPI in 1930 17.300
Inflation in 1929 -1.11%
Inflation in 1930 -2.81%

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

How to Calculate Inflation Rate for £1, 1929 to 1930

This inflation calculator uses the following inflation rate formula:

CPI in 1930CPI in 1929
1929 GBP value
1930 GBP value

Then plug in historical CPI values. The UK CPI was 17.8 in the year 1929 and 17.3 in 1930:


£1 in 1929 has the same "purchasing power" or "buying power" as £0.97 in 1930.

To get the total inflation rate for the 1 years between 1929 and 1930, we use the following formula:

CPI in 1930 - CPI in 1929CPI in 1929
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

17.3 - 17.817.8

News headlines from 1929

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

  • The world's smallest country, the Vatican City, is created as an enclave of Rome.
  • Seven gangsters are killed in Chicago on Al Capone's orders in an event now known as St. Valentine's Day Massacre.
  • A final solution of a border dispute between Chile and Peru is reached after the signing of the Treaty of Lima.
  • Beginning of the Great Depression with stock market crash known as "Black Thursday".
  • ‘Black Thursday’, leads to a Wall Street crash and the biggest depression in the history of the world.

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 1930 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 23 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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