£1 in 1928 is equivalent in purchasing power to about £0.99 in 1929.
The pound had an average **deflation** rate of -1.11% per year since 1928, producing a cumulative price change of -1.11%.
Purchasing power *increased* by 1.11% in 1929 compared to 1928. On average, you would have to spend 1.11% *less* money in 1929 than in 1928 for the same item.
This is an example of **deflation**.

This means that prices in 1929 are 1.11% lower than average prices since 1928, according to the Office for National Statistics composite price index.

The 1928 inflation rate was 0.00%. The inflation rate in 1929 was -1.11%. The 1929 inflation rate is lower compared to the average inflation rate of 4.64% per year between 1929 and 2021.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1929 was 17.80. It was 18.00 in the previous year, 1928. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation. Because the 1929 CPI is less than 1928 CPI, negative inflation (also known as deflation) has occurred.

⌃

Average inflation rate | -1.11% |

Converted amount (£1 base) | £0.99 |

Price difference (£1 base) | £-0.01 |

CPI in 1928 | 18.000 |

CPI in 1929 | 17.800 |

Inflation in 1928 | 0.00% |

Inflation in 1929 | -1.11% |

£1 in 1928 | £0.99 in 1929 |

Our calculations use the following inflation rate formula to calculate the change in value between 1928 and 1929:

CPI in 1929
CPI in 1928

×

1928 GBP value

=

1929 GBP value

Then plug in historical CPI values. The U.K. CPI was 18 in the year 1928 and 17.8 in 1929:

17.818

×

£1

=

£1 in 1928 has the same "purchasing power" or "buying power" as £0.99 in 1929.

To get the total inflation rate for the 1 years between 1928 and 1929, we use the following formula:

CPI in 1929 - CPI in 1928CPI in 1928

×

100

=

Plugging in the values to this equation, we get:

17.8 - 1818

×

100

=

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

- Amelia Earhart becomes the first woman to fly across the Atlantic Ocean.
- Jawaharlal Nehru requests Indian independence.
- Alexander Fleming, a Scottish bacteriologist, accidentally discovers penicillin while studying influenza.

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 1929 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 18 Sep. 2021, https://www.officialdata.org/UK-inflation-rate-in-1929.

Special thanks to QuickChart for their chart image API, which is used for chart downloads.

in2013dollars.com is a reference website maintained by the Official Data Foundation.

Average inflation rate | -1.11% |

Converted amount (£1 base) | £0.99 |

Price difference (£1 base) | £-0.01 |

CPI in 1928 | 18.000 |

CPI in 1929 | 17.800 |

Inflation in 1928 | 0.00% |

Inflation in 1929 | -1.11% |

£1 in 1928 | £0.99 in 1929 |