£100 in 1920 is worth £4,552.92 in 2020

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Value of £100 from 1920 to 2020

£100 in 1920 is equivalent in purchasing power to about £4,552.92 in 2020, an increase of £4,452.92 over 100 years. The pound had an average inflation rate of 3.89% per year between 1920 and 2020, producing a cumulative price increase of 4,452.92%.

This means that prices in 2020 are 45.53 times higher than average prices since 1920, according to the Office for National Statistics composite price index.

The 1920 inflation rate was 15.53%. The inflation rate in 2020 was 1.80%. The 2020 inflation rate is higher compared to the average inflation rate of 0.70% per year between 2020 and 2021.


Inflation from 1920 to 2020
Cumulative price change 4,452.92%
Average inflation rate 3.89%
Converted amount (£100 base) £4,552.92
Price difference (£100 base) £4,452.92
CPI in 1920 25.300
CPI in 2020 1,151.888
Inflation in 1920 15.53%
Inflation in 2020 1.80%
£100 in 1920 £4,552.92 in 2020

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

Buying power of £100 in 1920

This chart shows a calculation of buying power equivalence for £100 in 1920 (price index tracking began in 1750).

For example, if you started with £100, you would need to end with £4,552.92 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When £100 is equivalent to £4,552.92 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 1920 dollars, the chart below shows how £100 is worth less over 100 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: 1920-2020
Year Pound Value Inflation Rate
1920 £100.00 15.53%
1921 £91.30 -8.70%
1922 £78.66 -13.85%
1923 £73.91 -6.03%
1924 £73.52 -0.53%
1925 £73.52 0.00%
1926 £73.12 -0.54%
1927 £71.15 -2.70%
1928 £71.15 0.00%
1929 £70.36 -1.11%
1930 £68.38 -2.81%
1931 £65.61 -4.05%
1932 £64.03 -2.41%
1933 £62.45 -2.47%
1934 £62.45 0.00%
1935 £62.85 0.63%
1936 £63.24 0.63%
1937 £65.61 3.75%
1938 £66.40 1.20%
1939 £68.38 2.98%
1940 £79.84 16.76%
1941 £88.54 10.89%
1942 £94.86 7.14%
1943 £98.02 3.33%
1944 £100.79 2.82%
1945 £103.56 2.75%
1946 £106.72 3.05%
1947 £114.23 7.04%
1948 £122.92 7.61%
1949 £126.48 2.89%
1950 £130.43 3.13%
1951 £142.29 9.09%
1952 £155.34 9.17%
1953 £160.08 3.05%
1954 £163.24 1.98%
1955 £170.36 4.36%
1956 £179.05 5.10%
1957 £185.38 3.53%
1958 £191.30 3.20%
1959 £192.09 0.41%
1960 £194.07 1.03%
1961 £200.79 3.46%
1962 £209.49 4.33%
1963 £213.44 1.89%
1964 £220.55 3.33%
1965 £230.83 4.66%
1966 £239.92 3.94%
1967 £246.25 2.64%
1968 £257.71 4.65%
1969 £271.54 5.37%
1970 £288.93 6.40%
1971 £316.21 9.44%
1972 £338.74 7.13%
1973 £369.57 9.10%
1974 £428.85 16.04%
1975 £532.81 24.24%
1976 £620.95 16.54%
1977 £719.37 15.85%
1978 £779.05 8.30%
1979 £883.40 13.39%
1980 £1,042.29 17.99%
1981 £1,166.01 11.87%
1982 £1,266.40 8.61%
1983 £1,324.51 4.59%
1984 £1,390.51 4.98%
1985 £1,475.10 6.08%
1986 £1,525.30 3.40%
1987 £1,588.93 4.17%
1988 £1,666.80 4.90%
1989 £1,796.44 7.78%
1990 £1,966.40 9.46%
1991 £2,081.82 5.87%
1992 £2,159.68 3.74%
1993 £2,194.07 1.59%
1994 £2,247.04 2.41%
1995 £2,324.90 3.47%
1996 £2,381.03 2.41%
1997 £2,455.73 3.14%
1998 £2,539.92 3.43%
1999 £2,579.05 1.54%
2000 £2,655.34 2.96%
2001 £2,702.37 1.77%
2002 £2,747.43 1.67%
2003 £2,826.88 2.89%
2004 £2,911.07 2.98%
2005 £2,993.28 2.82%
2006 £3,088.93 3.20%
2007 £3,221.34 4.29%
2008 £3,349.80 3.99%
2009 £3,332.02 -0.53%
2010 £3,485.77 4.61%
2011 £3,667.19 5.20%
2012 £3,784.98 3.21%
2013 £3,900.00 3.04%
2014 £3,992.09 2.36%
2015 £4,031.62 0.99%
2016 £4,101.58 1.74%
2017 £4,248.62 3.58%
2018 £4,363.33 2.70%
2019 £4,472.41 2.50%
2020 £4,552.92 1.80%
2021 £4,584.79 0.70%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 94 more rows

This conversion table shows various other 1920 amounts in 2020 pounds, based on the 4,452.92% change in prices:

Conversion: 1920 pounds in 2020
Initial value Equivalent value
£1 pound in 1920 £45.53 pounds in 2020
£5 pounds in 1920 £227.65 pounds in 2020
£10 pounds in 1920 £455.29 pounds in 2020
£50 pounds in 1920 £2,276.46 pounds in 2020
£100 pounds in 1920 £4,552.92 pounds in 2020
£500 pounds in 1920 £22,764.58 pounds in 2020
£1,000 pounds in 1920 £45,529.16 pounds in 2020
£5,000 pounds in 1920 £227,645.80 pounds in 2020
£10,000 pounds in 1920 £455,291.59 pounds in 2020
£50,000 pounds in 1920 £2,276,457.95 pounds in 2020
£100,000 pounds in 1920 £4,552,915.90 pounds in 2020
£500,000 pounds in 1920 £22,764,579.52 pounds in 2020
£1,000,000 pounds in 1920 £45,529,159.05 pounds in 2020

How to Calculate Inflation Rate for £100, 1920 to 2020

Our calculations use the following inflation rate formula to calculate the change in value between 1920 and 2020:

CPI in 2020 CPI in 1920
×
1920 GBP value
=
2020 GBP value

Then plug in historical CPI values. The U.K. CPI was 25.3 in the year 1920 and 1151.88772393 in 2020:

1151.8877239325.3
×
£100
=
£4,552.92

£100 in 1920 has the same "purchasing power" or "buying power" as £4,552.92 in 2020.

To get the total inflation rate for the 100 years between 1920 and 2020, we use the following formula:

CPI in 2020 - CPI in 1920CPI in 1920
×
100
=
Cumulative inflation rate (100 years)

Plugging in the values to this equation, we get:

1151.88772393 - 25.325.3
×
100
=
4,453%

News headlines from 1920

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

  • The League of Nations' first assembly takes place in Paris.
  • The British Parliament passes the Fourth Home Rule Act, dividing Ireland into two parts and leading to a yearlong Anglo-Irish war in the southern counties.
  • The Catholic Church canonizes Joan of Arc, formally making her a saint.
  • The 19th Amendment to the constitution is ratified, granting U.S. woman suffrage for the first time.

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 1920 → 2020 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 17 May. 2021, https://www.officialdata.org/uk/inflation/1920?amount=100&endYear=2020.

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.


Ian Webster

About the author

Ian Webster is an engineer and data expert based in San Mateo, California. He has worked for Google, NASA, and consulted for governments around the world on data pipelines and data analysis. Disappointed by the lack of clear resources on the impacts of inflation on economic indicators, Ian believes this website serves as a valuable public tool. Ian earned his degree in Computer Science from Dartmouth College.

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Inflation from 1920 to 2020
Cumulative price change 4,452.92%
Average inflation rate 3.89%
Converted amount (£100 base) £4,552.92
Price difference (£100 base) £4,452.92
CPI in 1920 25.300
CPI in 2020 1,151.888
Inflation in 1920 15.53%
Inflation in 2020 1.80%
£100 in 1920 £4,552.92 in 2020