Inflation Calculator
See how inflation changes purchasing power over time. Compare dollar values between years at any inflation rate.
Inflation calculator
Compound purchasing power using an average annual inflation rate. If the end year is before the start year, the amount is deflated.
Formula: amount × (1 + rate)^(end − start). Uses a single average rate for the entire period.
Purchasing power in 2026
$144.50
10 years at 3.75% average
$100.00
Amount in 2016
$144.50
Adjusted (2026)
44.5%
Change
What the tool does
Inflation Calculator shows how purchasing power changes over time at a given inflation rate so you can compare dollar values across years.
How to use it
- Enter an amount and inflation rate.
- Set the number of years.
- Compare today’s value with the inflated (or deflated) equivalent.
Supported formats
- Currency amounts, inflation rates (%), years
Privacy & security
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
FAQs
- Is the inflation rate official CPI?
- You choose the rate (or use the value provided). Official CPI series can differ by index and country.
- Can inflation be negative?
- If you enter a negative rate, the math models deflation (rising purchasing power).
- Are inputs stored?
- No.