Inflation Calculator

See what pounds from any year since 1988 are worth today, and how much prices have risen, using the ONS consumer prices index (CPI).

Amount

Is worth in

£100.00 in 2000 is worth

£198.21

in September 2026. Prices rose 98.2% in between, 2.7% a year on average.

Price change: 98.2%
A year: 2.7%

What this means

Inflation means the same money buys less over time. Savings earning less interest than prices rise lose buying power, even as the balance grows, so it’s worth checking your rate against inflation.

The consumer price index tracks the cost of a typical basket of goods and services. Your own costs can rise faster or slower, depending on what you spend on.

Next step

Over the years

Year	Same buying power
2000	£100.00
2003	£103.85
2006	£109.90
2009	£119.12
2012	£132.19
2015	£137.55
2018	£145.67
2021	£153.51
2024	£184.18
September 2026	£198.21

What it takes to buy the same

£198.21£99.11£0.00

2000200320062009201220152018202120242026

Same buying power

Assumptions in this estimate

Uses the CPI index, all items (2015 = 100), the yearly average for each year and September 2026 for 2026.
The CPI starts in 1988.

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How the calculator works

Pick an amount and two years. The years run from 1988 to September 2026.
The change in prices: the price index in the second year divided by the index in the first. Each year uses its yearly average, and the latest year its most recent figure.
The result: your amount multiplied by that change, with the average yearly rate that compounds to the same rise.

You can also go backwards, to see what today’s money would have bought in an earlier year.

Examples

£100 in 2000 is worth £198.21 in September 2026: prices rose 98.2%.
£100 in 2020 is worth £132.57: prices rose 32.6% in just a few years.
£100 in 1988 is worth about £290.52 today.

Learn more

See our savings interest calculator, the compound interest calculator, and our guide to inflation and interest rates.

Last updated October 27, 2026

Frequently asked questions

What is £100 from 2000 worth today?

£198.21 in September 2026. Prices rose 98.2% over that time, about 2.7% a year on average.

How is inflation measured?

By the ONS consumer prices index (CPI): the cost of a typical basket of goods and services, priced every month and compared over time. Your own costs can rise faster or slower, depending on what you buy.

Why does inflation matter for my savings?

Savings earning less than inflation lose buying power. A Cash ISA keeps the interest tax-free.

What inflation rate does the Bank of England aim for?

The government sets the Bank of England a target of 2% a year, measured by the CPI.