Inflation calculator UK
See how prices have changed between two years and what an amount from the past is worth now, using the official Consumer Prices Index.
How this is calculated
The equivalent value is the amount multiplied by the CPI index for the later year and divided by the index for the earlier year.
Each year uses the average of that year's monthly index. The latest option uses the most recent monthly figure.
The average yearly rate is the compound rate that turns one index into the other over the years between them.
Rates used · 2026/27
| Measure | Consumer Prices Index, all items |
| Base | 2015 = 100 |
| Source | Office for National Statistics, series D7BT |
| Latest figure | August 2026, 143.6 |
Last checked July 2026. Source: HMRC and gov.uk.
Worked example
£1,000 in 2000 is worth £1,975.24 in August 2026 prices. The CPI index rose from 72.7 to 143.6, a 97.5% increase, or about 2.7% a year on average.
Common questions
What is CPI?
The Consumer Prices Index, the UK's main measure of inflation. It tracks the prices of a basket of everyday goods and services.
Why use CPI rather than RPI?
CPI is the official measure used for the Bank of England's inflation target and most benefits and pensions. RPI is no longer a national statistic.
Does this include house prices?
No. CPI does not include house prices or mortgage interest. Rents are included.
Why does my own cost of living feel different?
Because your spending is not the average basket. If energy, food or rent take a bigger share of your budget, your personal inflation rate can be higher.