🎈Inflation Calculator
See how inflation erodes the buying power of money over time.
This inflation rate is user-supplied (a reasonable default is pre-filled) — it is not live government CPI data.
Free Inflation Calculator
Wondering what your money will really be worth down the road? Our free inflation calculator shows exactly how rising prices erode purchasing power over time. Enter an amount, a time period, and an inflation rate, and instantly see what that money will be able to buy in the future — or work backwards to see what a past amount is worth today.
The calculator uses the standard compound inflation formula and shows the year-by-year breakdown, not just a final number, so you can see how the erosion compounds over time. Adjust the inflation rate to model different scenarios — from historical averages to your own assumptions.
No sign-up, no downloads, no limits. See the About page or the FAQ for more.
About the Inflation Calculator
Features
Two calculation modes
Future buying power and historical year-to-year equivalence.
Compound formula
Uses FV = PV × (1 + r)^n, applied per year.
Year-by-year table
Shows the cumulative erosion or growth, not just the final number.
Deflation handling
Negative or zero inflation rates are handled correctly without errors.
Frequently Asked Questions
How does the inflation calculator work?
Enter an amount, a time period, and an inflation rate; it applies compound inflation to show future or historical buying power.
Is it free?
Completely free, no sign-up or limits.
Does it use real government inflation data?
No; you supply the rate yourself (a reasonable default is pre-filled), so you can model any scenario.
What formula does it use?
The standard compound growth formula, FV = PV × (1 + r)^n, applied per year.
Can I calculate backwards from a past amount to today's value?
Yes, the historical equivalence mode converts between any two years in either direction.
What if I enter a negative inflation rate?
The calculator handles deflation correctly, showing values increasing in real terms.
Does it show a year-by-year breakdown?
Yes, not just the final result — a table shows the compounding effect each year.
Can I use it for any currency?
Yes, it works with any currency since it only manipulates a numeric amount and rate.
Is my data stored?
No; everything runs in your browser and isn't stored or sent anywhere.
Does it work on mobile?
Yes, fully responsive on all screen sizes.