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# UK inflation rate in 2009: -0.53%

### Inflation in 2009 and Its Effect on Pound Value

Purchasing power increased by 0.53% in 2009 compared to 2008. On average, you would have to spend 0.53% less money in 2009 than in 2008 for the same item. This is an example of deflation.

In other words, £1 in 2008 is equivalent in purchasing power to about £0.99 in 2009.

The 2008 inflation rate was 3.99%. The inflation rate in 2009 was -0.53%. The 2009 inflation rate is lower compared to the average inflation rate of 2.89% per year between 2009 and 2019.

Inflation rate is calculated by change in the composite price index (CPI). The CPI in 2009 was 843.00. It was 847.50 in the previous year, 2008. The difference in CPI between the years is used by the Office for National Statistics to officially determine inflation. Because the 2009 CPI is less than 2008 CPI, negative inflation (also known as deflation) has occurred.

 Average inflation rate -0.53% Converted amount (£1 base) £0.99 Price difference (£1 base) £-0.01 CPI in 2008 847.500 CPI in 2009 843.000 Inflation in 2008 3.99% Inflation in 2009 -0.53%

### How to Calculate Inflation Rate for £1, 2008 to 2009

This inflation calculator uses the following inflation rate formula:

CPI in 2009CPI in 2008
×
2008 GBP value
=
2009 GBP value

Then plug in historical CPI values. The UK CPI was 847.5 in the year 2008 and 843 in 2009:

843847.5
×
£1
=
£0.99

£1 in 2008 has the same "purchasing power" or "buying power" as £0.99 in 2009.

To get the total inflation rate for the 1 years between 2008 and 2009, we use the following formula:

CPI in 2009 - CPI in 2008CPI in 2008
×
100
=
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

843 - 847.5847.5
×
100
=
-1%

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

• Black Monday: stock markets crash all over the globe, resulting in enormous drops in global stock markets and halts in trading.
• Fidel Castro retires as Cuban President due to ill health, after nearly 50 years in power.
• Barak Obama becomes the first African American to receive the presidential nomination of his party.

### 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 2009 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 16 Sep. 2019, https://www.officialdata.org/UK-inflation-rate-in-2009.