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Inflation Calculator

Inflation Calculator shows how purchasing power changes over time at a given inflation rate so you can compare dollar values across years.

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

How to use Inflation Calculator

  1. Enter an amount and inflation rate.
  2. Set the number of years.
  3. Compare today’s value with the inflated (or deflated) equivalent.

Worked examples

Concrete numbers and cases you can check against the tool above.

$50 grocery run, 3% inflation, 10 years

Future cost ≈ 50 × (1.03)^10 ≈ $67.20. That is why a cash emergency fund target should be revisited. This uses the rate you enter, not a live CPI series — pair it with the buying-power tool when you want historical years.

When to use Inflation Calculator

Inflation quietly changes what money buys. Modeling purchasing power over years explains why savings targets must rise with prices.

Common use cases

  • Show how tuition costs might grow at a given rate.
  • Adjust a past salary into today’s dollars for storytelling.
  • Illustrate inflation for a personal finance lesson.
  • Estimate future grocery budgets under assumed inflation.

Inputs and outputs

  • Currency amounts, inflation rates (%), years

Privacy

This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.

Frequently asked questions

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.

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