£1 in 1920 → £0.66 in 1931

UK Inflation Calculator

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£1 in 1920 → £0.66 in 1931

UK Inflation Rate, £1 in 1920 to 1931

According to the Office for National Statistics composite price index, prices in 1931 are 34.39% lower than average prices throughout 1920. The pound experienced an average deflation rate of -3.76% per year during this period, meaning the real value of a dollar increased.

In other words, £1 in 1920 is equivalent in purchasing power to about £0.66 in 1931, a difference of £-0.34 over 11 years.

The 1920 inflation rate was 15.53%. The inflation rate in 1931 was -4.05%. The 1931 inflation rate is lower compared to the average inflation rate of 4.90% per year between 1931 and 2019.


Inflation from 1920 to 1931
Cumulative price change -34.39%
Average inflation rate -3.76%
Converted amount (£1 base) £0.66
Price difference (£1 base) £-0.34
CPI in 1920 25.300
CPI in 1931 16.600
Inflation in 1920 15.53%
Inflation in 1931 -4.05%

UK inflation chart from 1988 to 2017. Based on the UK Consumer Price Index.


Buying power of £1 in 1920

This chart shows calculation of buying power equivalence, often referred to as "the value of a pound" over time for £1 in 1920 (price index tracking began in 1750).

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:

Year Pound Value Inflation Rate
1920 £1.00 15.53%
1921 £0.91 -8.70%
1922 £0.79 -13.85%
1923 £0.74 -6.03%
1924 £0.74 -0.53%
1925 £0.74 0.00%
1926 £0.73 -0.54%
1927 £0.71 -2.70%
1928 £0.71 0.00%
1929 £0.70 -1.11%
1930 £0.68 -2.81%
1931 £0.66 -4.05%
1932 £0.64 -2.41%
1933 £0.62 -2.47%
1934 £0.62 0.00%
1935 £0.63 0.63%
1936 £0.63 0.63%
1937 £0.66 3.75%
1938 £0.66 1.20%
1939 £0.68 2.98%
1940 £0.80 16.76%
1941 £0.89 10.89%
1942 £0.95 7.14%
1943 £0.98 3.33%
1944 £1.01 2.82%
1945 £1.04 2.75%
1946 £1.07 3.05%
1947 £1.14 7.04%
1948 £1.23 7.61%
1949 £1.26 2.89%
1950 £1.30 3.13%
1951 £1.42 9.09%
1952 £1.55 9.17%
1953 £1.60 3.05%
1954 £1.63 1.98%
1955 £1.70 4.36%
1956 £1.79 5.10%
1957 £1.85 3.53%
1958 £1.91 3.20%
1959 £1.92 0.41%
1960 £1.94 1.03%
1961 £2.01 3.46%
1962 £2.09 4.33%
1963 £2.13 1.89%
1964 £2.21 3.33%
1965 £2.31 4.66%
1966 £2.40 3.94%
1967 £2.46 2.64%
1968 £2.58 4.65%
1969 £2.72 5.37%
1970 £2.89 6.40%
1971 £3.16 9.44%
1972 £3.39 7.13%
1973 £3.70 9.10%
1974 £4.29 16.04%
1975 £5.33 24.24%
1976 £6.21 16.54%
1977 £7.19 15.85%
1978 £7.79 8.30%
1979 £8.83 13.39%
1980 £10.42 17.99%
1981 £11.66 11.87%
1982 £12.66 8.61%
1983 £13.25 4.59%
1984 £13.91 4.98%
1985 £14.75 6.08%
1986 £15.25 3.40%
1987 £15.89 4.17%
1988 £16.67 4.90%
1989 £17.96 7.78%
1990 £19.66 9.46%
1991 £20.82 5.87%
1992 £21.60 3.74%
1993 £21.94 1.59%
1994 £22.47 2.41%
1995 £23.25 3.47%
1996 £23.81 2.41%
1997 £24.56 3.14%
1998 £25.40 3.43%
1999 £25.79 1.54%
2000 £26.55 2.96%
2001 £27.02 1.77%
2002 £27.47 1.67%
2003 £28.27 2.89%
2004 £29.11 2.98%
2005 £29.93 2.82%
2006 £30.89 3.20%
2007 £32.21 4.29%
2008 £33.50 3.99%
2009 £33.32 -0.53%
2010 £34.86 4.61%
2011 £36.67 5.20%
2012 £37.85 3.21%
2013 £39.00 3.04%
2014 £39.92 2.36%
2015 £40.32 0.99%
2016 £41.02 1.74%
2017 £42.49 3.58%
2018 £43.54 2.48%
2019 £44.32 1.80%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.
Click to show 5 more rows

How to Calculate Inflation Rate for £1, 1920 to 1931

This inflation calculator uses the following inflation rate formula:

CPI in 1931CPI in 1920
×
1920 GBP value
=
1931 GBP value

Then plug in historical CPI values. The UK CPI was 25.3 in the year 1920 and 16.6 in 1931:

16.625.3
×
£1
=
£0.66

£1 in 1920 has the same "purchasing power" or "buying power" as £0.66 in 1931.

To get the total inflation rate for the 11 years between 1920 and 1931, we use the following formula:

CPI in 1931 - CPI in 1920CPI in 1920
×
100
=
Cumulative inflation rate (11 years)

Plugging in the values to this equation, we get:

16.6 - 25.325.3
×
100
=
-34%

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: “£1 in 1920 → 1931 | UK Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 18 Sep. 2019, https://www.officialdata.org/1920-GBP-in-1931?amount=1.

Special thanks to QuickChart for providing downloadable chart images.

in2013dollars.com is a reference website maintained by the Official Data Foundation.


» Read more about inflation and investment.

Inflation from 1920 to 1931
Cumulative price change -34.39%
Average inflation rate -3.76%
Converted amount (£1 base) £0.66
Price difference (£1 base) £-0.34
CPI in 1920 25.300
CPI in 1931 16.600
Inflation in 1920 15.53%
Inflation in 1931 -4.05%
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