£1 in 1778 is equivalent in purchasing power to about £0.92 in 1779.
The pound had an average **deflation** rate of -8.45% per year since 1778, producing a cumulative price change of -8.45%.
Purchasing power *increased* by 8.45% in 1779 compared to 1778. On average, you would have to spend 8.45% *less* money in 1779 than in 1778 for the same item.
This is an example of **deflation**.

This means that prices in 1779 are 8.45% lower than average prices since 1778, according to the Office for National Statistics composite price index.

The 1778 inflation rate was 2.90%. The inflation rate in 1779 was -8.45%. The 1779 inflation rate is lower compared to the average inflation rate of 2.17% per year between 1779 and 2021.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 1779 was 6.50. It was 7.10 in the previous year, 1778. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation. Because the 1779 CPI is less than 1778 CPI, negative inflation (also known as deflation) has occurred.

⌃

Average inflation rate | -8.45% |

Converted amount (£1 base) | £0.92 |

Price difference (£1 base) | £-0.08 |

CPI in 1778 | 7.100 |

CPI in 1779 | 6.500 |

Inflation in 1778 | 2.90% |

Inflation in 1779 | -8.45% |

£1 in 1778 | £0.92 in 1779 |

Our calculations use the following inflation rate formula to calculate the change in value between 1778 and 1779:

CPI in 1779
CPI in 1778

×

1778 GBP value

=

1779 GBP value

Then plug in historical CPI values. The U.K. CPI was 7.1 in the year 1778 and 6.5 in 1779:

6.57.1

×

£1

=

£1 in 1778 has the same "purchasing power" or "buying power" as £0.92 in 1779.

To get the total inflation rate for the 1 years between 1778 and 1779, we use the following formula:

CPI in 1779 - CPI in 1778CPI in 1778

×

100

=

Plugging in the values to this equation, we get:

6.5 - 7.17.1

×

100

=

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

- Discovery of Maui in Hawaii (then Sandwich Islands) by Captain James Cook
- Louis XVI, King of France, declares war on Great Britain
- First U.S. treaty is signed in Paris, meaning that the French officially recognise the U.S. as a nation.

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 1779 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 18 Sep. 2021, https://www.officialdata.org/UK-inflation-rate-in-1779.

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 | -8.45% |

Converted amount (£1 base) | £0.92 |

Price difference (£1 base) | £-0.08 |

CPI in 1778 | 7.100 |

CPI in 1779 | 6.500 |

Inflation in 1778 | 2.90% |

Inflation in 1779 | -8.45% |

£1 in 1778 | £0.92 in 1779 |