Inflation Calculator
See what money from the past is worth today, and what today's prices could become
Your Money
What It's Worth
£100.00 in 2000 is worth
£198.21
in 2026 (September)
Something that cost £100.00 in 2000 would cost about £198.21 in 2026.
Prices rose by
98.2%
between 2000 and 2026
Average inflation
2.7%
a year
Based on the Consumer Prices Index (CPI) from the Office for National Statistics, using yearly averages. 2026 uses the latest figure, for September.
What £100.00 in 2000 Is Worth Each Year
Disclaimer: These figures are estimates for guidance only and errors may occur. Inflation affects everyone differently depending on what they buy, so your own costs may have risen faster or slower.
About inflation
Inflation is the rate at which prices go up. When it rises, each pound you hold buys a little less than it did before. This inflation calculator shows how much prices have changed since any year from 1988, and what today's prices could look like in the future, so you can see what your money is really worth.
The UK measures inflation mainly with the Consumer Prices Index, or CPI. Each month, the Office for National Statistics (ONS) tracks the prices of hundreds of everyday items, from bread and petrol to rent, clothes and holidays. The change in the cost of this "basket" over the past 12 months is the inflation rate you hear about in the news.
The Bank of England's job is to keep CPI inflation at 2% a year. It mainly does this by raising or lowering interest rates. Inflation is rarely exactly on target: it fell close to zero in 2015, then climbed to 11.1% in October 2022, the highest in over 40 years, as energy and food prices jumped. In the year to September 2026 it was 3.5%.
Inflation matters most for money that sits still. If your savings earn less interest than the inflation rate, they lose buying power each year, even though the number in your account goes up. The same goes for pay: a pay rise smaller than inflation is a pay cut in real terms.
For past years, the calculator uses the ONS CPI index, which gives each year a price level. It divides the index for one year by the index for the other and multiplies your amount by the result. For example, £100 × (138.4 ÷ 49.6) shows that £100 in 1988 is worth about £279 in 2025. Each year uses the average price level across that year. 2026 uses the latest monthly figure, for September, until the full-year figure is published.
For the future, there is no official data, so the calculator grows today's price by the yearly rate you choose. It starts at the latest real inflation rate, 3.5%. You can switch to the Bank of England's 2% target or enter your own figure. The average yearly inflation figure is the steady rate that would give the same total rise over the period.