£640 in 1925 is worth £40,539.24 in 2021

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Value of £640 from 1925 to 2021

£640 in 1925 is equivalent in purchasing power to about £40,539.24 in 2021, an increase of £39,899.24 over 96 years. The pound had an average inflation rate of 4.42% per year between 1925 and 2021, producing a cumulative price increase of 6,234.26%.

This means that prices in 2021 are 63.34 times higher than average prices since 1925, according to the Office for National Statistics composite price index.

The inflation rate in 1925 was 0.00%. The inflation rate in 2021 was 2.28%. The 2021 inflation rate is higher compared to the average inflation rate of 2.27% per year between 2021 and 2022.


Inflation from 1925 to 2021
Cumulative price change 6,234.26%
Average inflation rate 4.42%
Converted amount (£640 base) £40,539.24
Price difference (£640 base) £39,899.24
CPI in 1925 18.600
CPI in 2021 1,178.172
Inflation in 1925 0.00%
Inflation in 2021 2.28%
£640 in 1925 £40,539.24 in 2021

GBP Inflation since 1750
Annual Rate, the Office for National Statistics CPI
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Buying power of £640 in 1925

This chart shows a calculation of buying power equivalence for £640 in 1925 (price index tracking began in 1750).

For example, if you started with £640, you would need to end with £40,539.24 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When £640 is equivalent to £40,539.24 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 1925 dollars, the chart below shows how £640 is worth less over 96 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: 1925-2021
Year Pound Value Inflation Rate
1925 £640.00 -
1926 £636.56 -0.54%
1927 £619.35 -2.70%
1928 £619.35 0.00%
1929 £612.47 -1.11%
1930 £595.27 -2.81%
1931 £571.18 -4.05%
1932 £557.42 -2.41%
1933 £543.66 -2.47%
1934 £543.66 0.00%
1935 £547.10 0.63%
1936 £550.54 0.63%
1937 £571.18 3.75%
1938 £578.06 1.20%
1939 £595.27 2.98%
1940 £695.05 16.76%
1941 £770.75 10.89%
1942 £825.81 7.14%
1943 £853.33 3.33%
1944 £877.42 2.82%
1945 £901.51 2.75%
1946 £929.03 3.05%
1947 £994.41 7.04%
1948 £1,070.11 7.61%
1949 £1,101.08 2.89%
1950 £1,135.48 3.13%
1951 £1,238.71 9.09%
1952 £1,352.26 9.17%
1953 £1,393.55 3.05%
1954 £1,421.08 1.98%
1955 £1,483.01 4.36%
1956 £1,558.71 5.10%
1957 £1,613.76 3.53%
1958 £1,665.38 3.20%
1959 £1,672.26 0.41%
1960 £1,689.46 1.03%
1961 £1,747.96 3.46%
1962 £1,823.66 4.33%
1963 £1,858.06 1.89%
1964 £1,920.00 3.33%
1965 £2,009.46 4.66%
1966 £2,088.60 3.94%
1967 £2,143.66 2.64%
1968 £2,243.44 4.65%
1969 £2,363.87 5.37%
1970 £2,515.27 6.40%
1971 £2,752.69 9.44%
1972 £2,948.82 7.13%
1973 £3,217.20 9.10%
1974 £3,733.33 16.04%
1975 £4,638.28 24.24%
1976 £5,405.59 16.54%
1977 £6,262.37 15.85%
1978 £6,781.94 8.30%
1979 £7,690.32 13.39%
1980 £9,073.55 17.99%
1981 £10,150.54 11.87%
1982 £11,024.52 8.61%
1983 £11,530.32 4.59%
1984 £12,104.95 4.98%
1985 £12,841.29 6.08%
1986 £13,278.28 3.40%
1987 £13,832.26 4.17%
1988 £14,510.11 4.90%
1989 £15,638.71 7.78%
1990 £17,118.28 9.46%
1991 £18,123.01 5.87%
1992 £18,800.86 3.74%
1993 £19,100.22 1.59%
1994 £19,561.29 2.41%
1995 £20,239.14 3.47%
1996 £20,727.74 2.41%
1997 £21,378.06 3.14%
1998 £22,110.97 3.43%
1999 £22,451.61 1.54%
2000 £23,115.70 2.96%
2001 £23,525.16 1.77%
2002 £23,917.42 1.67%
2003 £24,609.03 2.89%
2004 £25,341.94 2.98%
2005 £26,057.63 2.82%
2006 £26,890.32 3.20%
2007 £28,043.01 4.29%
2008 £29,161.29 3.99%
2009 £29,006.45 -0.53%
2010 £30,344.95 4.61%
2011 £31,924.30 5.20%
2012 £32,949.68 3.21%
2013 £33,950.97 3.04%
2014 £34,752.69 2.36%
2015 £35,096.77 0.99%
2016 £35,705.81 1.74%
2017 £36,985.81 3.58%
2018 £37,984.42 2.70%
2019 £38,934.03 2.50%
2020 £39,634.85 1.80%
2021 £40,539.24 2.28%
2022 £41,458.05 2.27%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 90 more rows

This conversion table shows various other 1925 amounts in 2021 pounds, based on the 6,234.26% change in prices:

Conversion: 1925 pounds in 2021
Initial value Equivalent value
£1 pound in 1925 £63.34 pounds in 2021
£5 pounds in 1925 £316.71 pounds in 2021
£10 pounds in 1925 £633.43 pounds in 2021
£50 pounds in 1925 £3,167.13 pounds in 2021
£100 pounds in 1925 £6,334.26 pounds in 2021
£500 pounds in 1925 £31,671.28 pounds in 2021
£1,000 pounds in 1925 £63,342.56 pounds in 2021
£5,000 pounds in 1925 £316,712.82 pounds in 2021
£10,000 pounds in 1925 £633,425.65 pounds in 2021
£50,000 pounds in 1925 £3,167,128.25 pounds in 2021
£100,000 pounds in 1925 £6,334,256.49 pounds in 2021
£500,000 pounds in 1925 £31,671,282.46 pounds in 2021
£1,000,000 pounds in 1925 £63,342,564.92 pounds in 2021

How to Calculate Inflation Rate for £640, 1925 to 2021

Our calculations use the following inflation rate formula to calculate the change in value between 1925 and 2021:

CPI in 2021 CPI in 1925
×
1925 GBP value
=
2021 GBP value

Then plug in historical CPI values. The U.K. CPI was 18.6 in the year 1925 and 1178.1717074508606 in 2021:

1178.171707450860618.6
×
£640
=
£40,539.24

£640 in 1925 has the same "purchasing power" or "buying power" as £40,539.24 in 2021.

To get the total inflation rate for the 96 years between 1925 and 2021, we use the following formula:

CPI in 2021 - CPI in 1925CPI in 1925
×
100
=
Cumulative inflation rate (96 years)

Plugging in the values to this equation, we get:

1178.1717074508606 - 18.618.6
×
100
=
6,234%

News headlines from 1925

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

  • Mein Kampf is published by Adolf Hitler.
  • The Ku Klux Klan's first national march takes place in Washington.
  • The last Qajar Shah of Iran is deposed with Reza Shah Pahlavi taking over.
  • Scopes monkey trial ends in Dayton, Tennessee, finding John T. Scopes guilty of teaching evolution.

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: “£640 in 1925 → 2021 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 28 Jan. 2022, https://www.officialdata.org/uk/inflation/1925?amount=640&endYear=2021.

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 1925 to 2021
Cumulative price change 6,234.26%
Average inflation rate 4.42%
Converted amount (£640 base) £40,539.24
Price difference (£640 base) £39,899.24
CPI in 1925 18.600
CPI in 2021 1,178.172
Inflation in 1925 0.00%
Inflation in 2021 2.28%
£640 in 1925 £40,539.24 in 2021