See how inflation has changed the value of money between two years. Uses historical US and UK consumer price index data to adjust an amount for inflation.
Enter an amount, a start year and an end year (and choose US or UK data). The calculator shows what the amount is worth in the end year, the percentage price increase and the real (deflated) value.
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An inflation calculator measures how rising prices erode purchasing power. $100 in 2000 buys noticeably less today; this tool shows exactly how much, using historical consumer price index data.
Adjusted = amount × (CPIend / CPIstart). The ratio of price indices scales the amount. 'Real value' is the reverse — what a today-amount was worth back then.
No. They use approximate annual average index values for estimation. For precise work, use the official BLS (US) or ONS (UK) inflation calculators.
CPI is the headline consumer price index most countries target. RPI (UK) is an older measure that includes mortgage interest and usually runs higher. This tool uses CPI-style data.