£100 in 1975 is worth £844.39 today

£

Value of £100 from 1975 to 2020

According to the Office for National Statistics composite price index, today's prices in 2020 are 744.39% higher than average prices since 1975. The British pound experienced an average inflation rate of 4.86% per year during this period, causing the real value of a pound to decrease.

In other words, £100 in 1975 is equivalent in purchasing power to about £844.39 in 2020, a difference of £744.39 over 45 years.

The 1975 inflation rate was 24.24%. The current year-over-year inflation rate (2019 to 2020) is now 1.50%1. If this number holds, £100 today will be equivalent in buying power to £101.50 next year.

 Cumulative price change 744.39% Average inflation rate 4.86% Converted amount (£100 base) £844.39 Price difference (£100 base) £744.39 CPI in 1975 134.800 CPI in 2020 1,138.243 Inflation in 1975 24.24% Inflation in 2020 1.50%

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

Buying power of £100 in 1975

This chart shows a calculation of buying power equivalence for £100 in 1975 (price index tracking began in 1750).

For example, if you started with £100, you would need to end with £844.39 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When £100 is equivalent to £844.39 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 1975 dollars, the chart below shows how £100 is worth less over 45 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: 1975-2020
Year Pound Value Inflation Rate
1975 £100.00 24.24%
1976 £116.54 16.54%
1977 £135.01 15.85%
1978 £146.22 8.30%
1979 £165.80 13.39%
1980 £195.62 17.99%
1981 £218.84 11.87%
1982 £237.69 8.61%
1983 £248.59 4.59%
1984 £260.98 4.98%
1985 £276.85 6.08%
1986 £286.28 3.40%
1987 £298.22 4.17%
1988 £312.83 4.90%
1989 £337.17 7.78%
1990 £369.07 9.46%
1991 £390.73 5.87%
1992 £405.34 3.74%
1993 £411.80 1.59%
1994 £421.74 2.41%
1995 £436.35 3.47%
1996 £446.88 2.41%
1997 £460.91 3.14%
1998 £476.71 3.43%
1999 £484.05 1.54%
2000 £498.37 2.96%
2001 £507.20 1.77%
2002 £515.65 1.67%
2003 £530.56 2.89%
2004 £546.36 2.98%
2005 £561.80 2.82%
2006 £579.75 3.20%
2007 £604.60 4.29%
2008 £628.71 3.99%
2009 £625.37 -0.53%
2010 £654.23 4.61%
2011 £688.28 5.20%
2012 £710.39 3.21%
2013 £731.97 3.04%
2014 £749.26 2.36%
2015 £756.68 0.99%
2016 £769.81 1.74%
2017 £797.40 3.58%
2018 £817.21 2.48%
2019 £831.92 1.80%
2020 £844.39 1.50%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 39 more rows

This conversion table shows various other 1975 amounts in today's pounds, based on the 744.39% change in prices:

Conversion Table: Value of a pound today
Initial value Equivalent value
£1 pound in 1975 £8.44 pounds today
£5 pounds in 1975 £42.22 pounds today
£10 pounds in 1975 £84.44 pounds today
£50 pounds in 1975 £422.20 pounds today
£100 pounds in 1975 £844.39 pounds today
£500 pounds in 1975 £4,221.97 pounds today
£1,000 pounds in 1975 £8,443.94 pounds today
£5,000 pounds in 1975 £42,219.71 pounds today
£10,000 pounds in 1975 £84,439.42 pounds today
£50,000 pounds in 1975 £422,197.09 pounds today
£100,000 pounds in 1975 £844,394.18 pounds today
£500,000 pounds in 1975 £4,221,970.92 pounds today
£1,000,000 pounds in 1975 £8,443,941.85 pounds today

How to Calculate Inflation Rate for £100 since 1975

Our calculations use the following inflation rate formula to calculate the change in value between 1975 and today:

CPI today CPI in 1975
×
1975 GBP value
=
Today's value

Then plug in historical CPI values. The U.K. CPI was 134.8 in the year 1975 and 1138.2433607545 in 2020:

1138.2433607545134.8
×
£100
=
£844.39

£100 in 1975 has the same "purchasing power" or "buying power" as £844.39 in 2020.

To get the total inflation rate for the 45 years between 1975 and 2020, we use the following formula:

CPI in 2020 - CPI in 1975CPI in 1975
×
100
=
Cumulative inflation rate (45 years)

Plugging in the values to this equation, we get:

1138.2433607545 - 134.8134.8
×
100
=
744%

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

• Margaret Thatcher becomes leader of the British Conservative Party, after defeating Edward Heath.
• Ethiopia abrogates its 3,000-year-old monarchy.
• Bill Gates and Paul Allen found Microsoft.
• The US signals the beginning of the end of its involvement Vietnam, after it begins to evacuate its citizens from Saigon.
• Gough Whitlam is removed by Governor General Sir John Kerr: the first time an elected Prime Minister had been deposed in 200 years (Australia).

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: “£100 in 1975 → 2020 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 27 May. 2020, https://www.officialdata.org/uk/inflation/1975?amount=100&endYear=2020.