£1 in 2015 is worth £0.91 in 2011

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Value of £1 from 2015 to 2011

£1 in 2015 is equivalent in purchasing power to about £0.91 in 2011, an increase of £-0.09 over 4 years. The pound had an average inflation rate of 2.40% per year between 2011 and 2015, producing a cumulative price increase of -9.04%.

This means that prices in 2011 are 9.04% lower than average prices since 2015, according to the Office for National Statistics composite price index.

The 2011 inflation rate was 5.20%. The inflation rate in 2015 was 0.99%. The 2015 inflation rate is lower compared to the average inflation rate of 2.22% per year between 2015 and 2020.

 Cumulative price change -9.04% Average inflation rate 2.40% Converted amount (£1 base) £0.91 Price difference (£1 base) £-0.09 CPI in 2015 1,020.000 CPI in 2011 927.800 Inflation in 2011 5.20% Inflation in 2015 0.99% £1 in 2015 £0.91 in 2011

GBP Inflation since 1750
Annual Rate, the Office for National Statistics CPI

Buying power of £1 in 2011

This chart shows a calculation of buying power equivalence for £1 in 2011 (price index tracking began in 1750).

For example, if you started with £1, you would need to end with £0.91 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When £1 is equivalent to £0.91 over time, that means that the "real value" of a single U.K. pound decreases over time. In other words, a pound will pay for fewer items at the store.

This effect explains how inflation erodes the value of a pound over time. By calculating the value in 2011 dollars, the chart below shows how £1 is worth less over 4 years.

According to the Office for National Statistics, each of these GBP amounts below is equal in terms of what it could buy at the time:

Pound inflation: 2011-2015
Year Pound Value Inflation Rate
2011 £1.00 5.20%
2012 £1.03 3.21%
2013 £1.06 3.04%
2014 £1.09 2.36%
2015 £1.10 0.99%
2016 £1.12 1.74%
2017 £1.16 3.58%
2018 £1.19 2.48%
2019 £1.21 1.80%
2020 £1.23 1.50%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.

This conversion table shows various other 2011 amounts in 2015 pounds, based on the -9.04% change in prices:

Conversion: 2011 pounds in 2015
Initial value Equivalent value
£1 pound in 2011 £1.10 pounds in 2015
£5 pounds in 2011 £5.50 pounds in 2015
£10 pounds in 2011 £10.99 pounds in 2015
£50 pounds in 2011 £54.97 pounds in 2015
£100 pounds in 2011 £109.94 pounds in 2015
£500 pounds in 2011 £549.69 pounds in 2015
£1,000 pounds in 2011 £1,099.37 pounds in 2015
£5,000 pounds in 2011 £5,496.87 pounds in 2015
£10,000 pounds in 2011 £10,993.75 pounds in 2015
£50,000 pounds in 2011 £54,968.74 pounds in 2015
£100,000 pounds in 2011 £109,937.49 pounds in 2015
£500,000 pounds in 2011 £549,687.43 pounds in 2015
£1,000,000 pounds in 2011 £1,099,374.87 pounds in 2015

How to Calculate Inflation Rate for £1, 2011 to 2015

Our calculations use the following inflation rate formula to calculate the change in value between 2011 and 2015:

CPI in 2011 CPI in 2015
×
2015 GBP value
=
2011 GBP value

Then plug in historical CPI values. The U.K. CPI was 1020 in the year 2015 and 927.8 in 2011:

927.81020
×
£1
=
£0.91

£1 in 2015 has the same "purchasing power" or "buying power" as £0.91 in 2011.

To get the total inflation rate for the 4 years between 2011 and 2015, we use the following formula:

CPI in 2011 - CPI in 2015CPI in 2015
×
100
=
Cumulative inflation rate (4 years)

Plugging in the values to this equation, we get:

927.8 - 10201020
×
100
=
-9%

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

• Barack Obama and Raul Castro, hold the first meeting between Cuban and American leaders since the Cuban Revolution.
• The population of India reaches 1 billion (officially). The billionth baby was named Astha Arora.
• Donald Trump announces his intention to join the US presidential campaign.
• China brings an end to its one child policy, 35 years after it was first introduced.

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: “£1 in 2015 → 2011 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 20 Jan. 2021, https://www.officialdata.org/uk/inflation/2015?amount=1&endYear=2011.

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.