Inflation Impact Calculator

Same calculator as the savings inflation page, framed for general purchasing-power questions.

Inflation reduces the real value of a fixed amount over time. Useful for comparing historical wages, savings without growth, and pension pots without drawdown.

Worked examples

£100 in 2010, 30% cumulative inflation by 2024: real value ≈ £77 today.

State pension £100/wk frozen for 5 years at 4% CPI: real value ≈ £82/wk by year 5.

Sources: ONS CPI · retrieved 2026-05-12.

Frequently asked questions

Should I use CPI or RPI?

CPI for current calculations — the official ONS measure. RPI for some historical contracts (legacy pension increases, rail fares, gilt indexation).