According to the Office for National Statistics composite price index, prices in 2009 are 4.41% lower than average prices since 2010. The British pound experienced an average inflation rate of 4.61% per year during this period, causing the real value of a pound to decrease.

In other words, £1 in 2010 is equivalent in purchasing power to about £0.96 in 2009.

The 2009 inflation rate was -0.53%. The inflation rate in 2010 was 4.61%. The 2010 inflation rate is higher compared to the average inflation rate of 2.58% per year between 2010 and 2020.

⌃

Average inflation rate | 4.61% |

Converted amount (£1 base) | £0.96 |

Price difference (£1 base) | £-0.04 |

CPI in 2010 | 881.900 |

CPI in 2009 | 843.000 |

Inflation in 2009 | -0.53% |

Inflation in 2010 | 4.61% |

Our calculations use the following inflation rate formula to calculate the change in value between 2009 and 2010:

CPI in 2009
CPI in 2010

×

2010 GBP value

=

2009 GBP value

Then plug in historical CPI values. The U.K. CPI was 881.9 in the year 2010 and 843 in 2009:

843881.9

×

£1

=

£1 in 2010 has the same "purchasing power" or "buying power" as £0.96 in 2009.

To get the total inflation rate for the 1 years between 2009 and 2010, we use the following formula:

CPI in 2009 - CPI in 2010CPI in 2010

×

100

=

Plugging in the values to this equation, we get:

843 - 881.9881.9

×

100

=

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

- The Copiapo mining accident in Chile ends, after 33 miners resurface having spent 69 days trapped in the ruins.
- Big Haiti earthquake kills 230,000 people and leaves most of Port-au-Prince, its capital, in ruins.
- An explosion on the Deepwater Horizon (a drilling rig), kills 11 people and spills a massive amount of oil into the Gulf of Mexico.
- The US army abolishes the "Don't Ask Don't Tell" policy, which had banned homosexuals from openly serving in the US military.

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: “£1 in 2010 → 2009 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 30 May. 2020, https://www.officialdata.org/uk/inflation/2010?amount=1&endYear=2009.

Special thanks to QuickChart for providing downloadable chart images.

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

Average inflation rate | 4.61% |

Converted amount (£1 base) | £0.96 |

Price difference (£1 base) | £-0.04 |

CPI in 2010 | 881.900 |

CPI in 2009 | 843.000 |

Inflation in 2009 | -0.53% |

Inflation in 2010 | 4.61% |