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Calculate how inflation affects your money's value and predict future purchasing power.
| Scenario | Low | Base | High |
|---|---|---|---|
| Future Purchasing Power | — | — | — |
Enter your own annual assumption. This page does not fetch a current inflation reading. The base scenario is your input; low and high are one percentage point below and above it, with the low rate never below 0%.
CPIH, CPI and RPI are distinct official measures, not interchangeable values in this calculator. For the latest releases, consult the <a href="https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/consumerpriceinflation/latest">ONS inflation bulletin</a>; Bank Rate history is published by the <a href="https://www.bankofengland.co.uk/boeapps/database/Bank-Rate.asp">Bank of England</a>.
Purchasing power = amount ÷ (1 + rate)^years. The result is an illustration based on a constant annual assumption, not a forecast, personal financial advice, or a current official statistic.
the UK inflation calculation explains its inputs, assumptions, and calculation scope.
It applies the entered price and inflation rate: future value = present value × (1 + rate)^years to the entered values.
£100 rising by 3% for one year becomes £103.