Inflation Then vs Now

An inflation calculator shows the purchasing power of money across time using the Consumer Price Index (CPI). If inflation averages 3% per year, £100 in 2000 would need to be £181 in 2025 to buy the same goods

The calculator uses the standard published formula for inflation. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, British pounds, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Adjusted value = Original amount × (CPI_end / CPI_start). Each step in the calculation is shown so you can verify the result manually.