CALCULATORS
Put a number on what inflation means to you.
Four free calculators built on official consumer price data. Convert money between years, check a rate, or test "if" scenarios — and see exactly how each answer is worked out.
Four tools, one question each
Free · no sign-up · works in your own currency
CPI / purchasing-power calculator
Convert an amount between any two years using a country's official consumer price index, in that country's own currency.
"What is my 2015 salary of $200,000 worth in today's money?"
Historical money-value calculator
Look back decades: what an old price, wage or savings balance would be in today's money, with the long history charted.
"A cinema ticket cost $2 in 1980. What is that today?"
CPI & inflation-rate calculator
Enter two index values from any price index and get the change, the annualised rate and the difference in index points.
"CPI went from 304.7 to 313.7 in a year. What's the rate?"
Custom inflation projection
Choose your own inflation rate and time span to see what prices could become — and how much buying power you'd lose.
"If inflation averages 4%, what will today's rent cost in 10 years?"
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The calculator workbench
Change any number — results update as you type
What is an amount from one year worth in another year's money?
What is it worth today?
Convert an amount between years using USA CPI.
Enter an amount and two years to see the result.
Uses annual averages; month-level precision needs monthly index data.
The same idea over a longer span, using the latest full year as "today".
Enter an amount and a past year to see today's equivalent.
World Bank annual CPI · annual avg, from 1960
Enter two index values and the time between them — get the rate.
304.7 → 313.7 over 12 months = +3.0% total change.
Any index you choose — national CPI, HICP, core, or sector index.
Your rate, your time span. Not a forecast — a scenario.
$1,000 today will cost about
$1343.92
in 10 years at 3% average inflation
Your assumption — not a forecast. Based on constant annual compounding.
No black boxes
Every calculator uses one short formula on a price index. Here they are, so you can check any answer yourself.
A is an amount. CPI is the country's average price index in each year.
The same idea over a longer span, using the latest full year as "today".
A and B are index values a period of m months apart. Annualising scales a short change to a yearly pace.
r is your assumed yearly rate and n is the number of years. The second line is buying power: A × (1 ÷ (1 + r)n).
Good to know before you calculate
- It's an average. CPI tracks a typical household basket. Your own costs may have risen faster or slower.
- Annual vs monthly. Year-to-year comparisons use annual averages; month-by-month answers need monthly index data.
- Projections are assumptions. The projection calculator shows the result of the rate you choose — it is not a prediction.
- Contracts name an index. For rent or wage indexation, use the exact index and dates in your agreement.
What each calculator uses
Data sourced from World Bank WDI, BLS, and Eurostat HICP.
Read the full methodology →QUESTIONS