£100 in 1905 is worth £12,385.89 in 2020

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Value of £100 from 1905 to 2020

£100 in 1905 is equivalent in purchasing power to about £12,385.89 in 2020, an increase of £12,285.89 over 115 years. The pound had an average inflation rate of 4.28% per year between 1905 and 2020, producing a cumulative price increase of 12,285.89%.

This means that prices in 2020 are 123.86 times higher than average prices since 1905, according to the Office for National Statistics composite price index.

The 1905 inflation rate was 0.00%. 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 1905 to 2020
Cumulative price change 12,285.89%
Average inflation rate 4.28%
Converted amount (£100 base) £12,385.89
Price difference (£100 base) £12,285.89
CPI in 1905 9.300
CPI in 2020 1,151.888
Inflation in 1905 0.00%
Inflation in 2020 1.80%
£100 in 1905 £12,385.89 in 2020

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

Buying power of £100 in 1905

This chart shows a calculation of buying power equivalence for £100 in 1905 (price index tracking began in 1750).

For example, if you started with £100, you would need to end with £12,385.89 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When £100 is equivalent to £12,385.89 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 1905 dollars, the chart below shows how £100 is worth less over 115 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: 1905-2020
Year Pound Value Inflation Rate
1905 £100.00 -
1906 £100.00 0.00%
1907 £101.08 1.08%
1908 £101.08 0.00%
1909 £102.15 1.06%
1910 £103.23 1.05%
1911 £103.23 0.00%
1912 £106.45 3.13%
1913 £105.38 -1.01%
1914 £105.38 0.00%
1915 £118.28 12.24%
1916 £139.78 18.18%
1917 £175.27 25.38%
1918 £213.98 22.09%
1919 £235.48 10.05%
1920 £272.04 15.53%
1921 £248.39 -8.70%
1922 £213.98 -13.85%
1923 £201.08 -6.03%
1924 £200.00 -0.53%
1925 £200.00 0.00%
1926 £198.92 -0.54%
1927 £193.55 -2.70%
1928 £193.55 0.00%
1929 £191.40 -1.11%
1930 £186.02 -2.81%
1931 £178.49 -4.05%
1932 £174.19 -2.41%
1933 £169.89 -2.47%
1934 £169.89 0.00%
1935 £170.97 0.63%
1936 £172.04 0.63%
1937 £178.49 3.75%
1938 £180.65 1.20%
1939 £186.02 2.98%
1940 £217.20 16.76%
1941 £240.86 10.89%
1942 £258.06 7.14%
1943 £266.67 3.33%
1944 £274.19 2.82%
1945 £281.72 2.75%
1946 £290.32 3.05%
1947 £310.75 7.04%
1948 £334.41 7.61%
1949 £344.09 2.89%
1950 £354.84 3.13%
1951 £387.10 9.09%
1952 £422.58 9.17%
1953 £435.48 3.05%
1954 £444.09 1.98%
1955 £463.44 4.36%
1956 £487.10 5.10%
1957 £504.30 3.53%
1958 £520.43 3.20%
1959 £522.58 0.41%
1960 £527.96 1.03%
1961 £546.24 3.46%
1962 £569.89 4.33%
1963 £580.65 1.89%
1964 £600.00 3.33%
1965 £627.96 4.66%
1966 £652.69 3.94%
1967 £669.89 2.64%
1968 £701.08 4.65%
1969 £738.71 5.37%
1970 £786.02 6.40%
1971 £860.22 9.44%
1972 £921.51 7.13%
1973 £1,005.38 9.10%
1974 £1,166.67 16.04%
1975 £1,449.46 24.24%
1976 £1,689.25 16.54%
1977 £1,956.99 15.85%
1978 £2,119.35 8.30%
1979 £2,403.23 13.39%
1980 £2,835.48 17.99%
1981 £3,172.04 11.87%
1982 £3,445.16 8.61%
1983 £3,603.23 4.59%
1984 £3,782.80 4.98%
1985 £4,012.90 6.08%
1986 £4,149.46 3.40%
1987 £4,322.58 4.17%
1988 £4,534.41 4.90%
1989 £4,887.10 7.78%
1990 £5,349.46 9.46%
1991 £5,663.44 5.87%
1992 £5,875.27 3.74%
1993 £5,968.82 1.59%
1994 £6,112.90 2.41%
1995 £6,324.73 3.47%
1996 £6,477.42 2.41%
1997 £6,680.65 3.14%
1998 £6,909.68 3.43%
1999 £7,016.13 1.54%
2000 £7,223.66 2.96%
2001 £7,351.61 1.77%
2002 £7,474.19 1.67%
2003 £7,690.32 2.89%
2004 £7,919.35 2.98%
2005 £8,143.01 2.82%
2006 £8,403.23 3.20%
2007 £8,763.44 4.29%
2008 £9,112.90 3.99%
2009 £9,064.52 -0.53%
2010 £9,482.80 4.61%
2011 £9,976.34 5.20%
2012 £10,296.77 3.21%
2013 £10,609.68 3.04%
2014 £10,860.22 2.36%
2015 £10,967.74 0.99%
2016 £11,158.06 1.74%
2017 £11,558.06 3.58%
2018 £11,870.13 2.70%
2019 £12,166.89 2.50%
2020 £12,385.89 1.80%
2021 £12,472.59 0.70%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 109 more rows

This conversion table shows various other 1905 amounts in 2020 pounds, based on the 12,285.89% change in prices:

Conversion: 1905 pounds in 2020
Initial value Equivalent value
£1 pound in 1905 £123.86 pounds in 2020
£5 pounds in 1905 £619.29 pounds in 2020
£10 pounds in 1905 £1,238.59 pounds in 2020
£50 pounds in 1905 £6,192.94 pounds in 2020
£100 pounds in 1905 £12,385.89 pounds in 2020
£500 pounds in 1905 £61,929.45 pounds in 2020
£1,000 pounds in 1905 £123,858.90 pounds in 2020
£5,000 pounds in 1905 £619,294.48 pounds in 2020
£10,000 pounds in 1905 £1,238,588.95 pounds in 2020
£50,000 pounds in 1905 £6,192,944.75 pounds in 2020
£100,000 pounds in 1905 £12,385,889.50 pounds in 2020
£500,000 pounds in 1905 £61,929,447.52 pounds in 2020
£1,000,000 pounds in 1905 £123,858,895.05 pounds in 2020

How to Calculate Inflation Rate for £100, 1905 to 2020

Our calculations use the following inflation rate formula to calculate the change in value between 1905 and 2020:

CPI in 2020 CPI in 1905
×
1905 GBP value
=
2020 GBP value

Then plug in historical CPI values. The U.K. CPI was 9.3 in the year 1905 and 1151.88772393 in 2020:

1151.887723939.3
×
£100
=
£12,385.89

£100 in 1905 has the same "purchasing power" or "buying power" as £12,385.89 in 2020.

To get the total inflation rate for the 115 years between 1905 and 2020, we use the following formula:

CPI in 2020 - CPI in 1905CPI in 1905
×
100
=
Cumulative inflation rate (115 years)

Plugging in the values to this equation, we get:

1151.88772393 - 9.39.3
×
100
=
12,286%

News headlines from 1905

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

  • The Industrial Workers of the World is formed. It is an American anarcho-syndicalist union.
  • Bloody Sunday in Russia: troops fire and kill protesters, mostly workers, marching to the Winter Palace in order to hand a petition to the Tsar.
  • Potemkin's arrival at Odessa leads to sailors joining civilians in the '1905 Revolution’.

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 1905 → 2020 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 7 May. 2021, https://www.officialdata.org/uk/inflation/1905?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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» Read more about inflation and investment.

Inflation from 1905 to 2020
Cumulative price change 12,285.89%
Average inflation rate 4.28%
Converted amount (£100 base) £12,385.89
Price difference (£100 base) £12,285.89
CPI in 1905 9.300
CPI in 2020 1,151.888
Inflation in 1905 0.00%
Inflation in 2020 1.80%
£100 in 1905 £12,385.89 in 2020