Value of £1 from 1820 to 1818
£1 in 1820 is equivalent in purchasing power to about £1.13 in 1818, a difference of £0.13 over 2 years. The pound had an average deflation rate of -5.85% per year since 1818, producing a cumulative price change of 12.82%.
This means that prices in 1818 are 1.13 times as high as average prices since 1820, according to the Office for National Statistics composite price index.
The inflation rate in 1818 was 0.00%. The inflation rate in 1820 was -9.30%. The 1820 inflation rate is lower compared to the average inflation rate of 2.38% per year between 1820 and 2025.
⌃
| Cumulative price change | 12.82% |
| Average inflation rate | -5.85% |
| Converted amount £1 base | £1.13 |
| Price difference £1 base | £0.13 |
| CPI in 1820 | 11.700 |
| CPI in 1818 | 13.200 |
| Inflation in 1818 | 0.00% |
| Inflation in 1820 | -9.30% |
| £1 in 1820 | £1.13 in 1818 |
Buying power of £1 in 1818
This chart shows a calculation of buying power equivalence for £1 in 1818 (price index tracking began in 1750).
For example, if you started with £1, you would need to end with £1.13 in order to "adjust" for inflation (sometimes refered to as "beating inflation").
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:
This conversion table shows various other 1818 amounts in 1820 pounds, based on the 12.82% change in prices:
| Initial value | Equivalent value |
|---|---|
| £1 pound in 1818 | £0.89 pounds in 1820 |
| £5 pounds in 1818 | £4.43 pounds in 1820 |
| £10 pounds in 1818 | £8.86 pounds in 1820 |
| £50 pounds in 1818 | £44.32 pounds in 1820 |
| £100 pounds in 1818 | £88.64 pounds in 1820 |
| £500 pounds in 1818 | £443.18 pounds in 1820 |
| £1,000 pounds in 1818 | £886.36 pounds in 1820 |
| £5,000 pounds in 1818 | £4,431.82 pounds in 1820 |
| £10,000 pounds in 1818 | £8,863.64 pounds in 1820 |
| £50,000 pounds in 1818 | £44,318.18 pounds in 1820 |
| £100,000 pounds in 1818 | £88,636.36 pounds in 1820 |
| £500,000 pounds in 1818 | £443,181.82 pounds in 1820 |
| £1,000,000 pounds in 1818 | £886,363.64 pounds in 1820 |
How to calculate inflation rate for £1, 1818 to 1820
Our calculations use the following inflation rate formula to calculate the change in value between 1818 and 1820:
CPI in 1818 CPI in 1820
×
1820 GBP value
=
1818 GBP value
Then plug in historical CPI values. The U.K. CPI was 11.7 in the year 1820 and 13.2 in 1818:
13.211.7
×
£1
=
£1.13
£1 in 1820 has the same "purchasing power" or "buying power" as £1.13 in 1818.
To get the total inflation rate for the 2 years between 1818 and 1820, we use the following formula:
CPI in 1818 - CPI in 1820CPI in 1820
×
100
=
Cumulative inflation rate (2 years)
Plugging in the values to this equation, we get:
13.2 - 11.711.7
×
100
=
13%
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 the current year, which is based on The Bank of England's forecast.
You may use the following MLA citation for this page: “£1 in 1820 → 1818 | UK Inflation Calculator.” Official Inflation Data, Alioth Finance, 14 Mar. 2025, https://www.officialdata.org/uk/inflation/1820?amount=1&endYear=1818.
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.
| Cumulative price change | 12.82% |
| Average inflation rate | -5.85% |
| Converted amount £1 base | £1.13 |
| Price difference £1 base | £0.13 |
| CPI in 1820 | 11.700 |
| CPI in 1818 | 13.200 |
| Inflation in 1818 | 0.00% |
| Inflation in 1820 | -9.30% |
| £1 in 1820 | £1.13 in 1818 |
