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Based on ONS CPI (2015 = 100), series 130925

UK Inflation Calculator — FAQ

Answers to common questions about our methodology, data sources and assumptions.

We use the ONS CPI Annual Rate time series (D7G7/MM23, base 2015 = 100), fetched directly from the ONS public API.

We compute: Adjusted amount = Original × (Index(target) ÷ Index(start)).

Data is fetched live from the ONS API and cached for one week. New CPI releases are typically published monthly by the ONS.

No. This calculator is for guidance and educational purposes only.

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