Is the entered inflation rate a forecast?

No. It is a scenario assumption. Actual inflation changes from year to year and differs across goods, services, and locations.

Why does the calculator compound inflation?

Each year's price increase applies to the prior year's higher price, creating a compounding effect over multiple years.

Does CPI match my personal inflation rate?

Not necessarily. CPI measures a broad market basket. Your personal spending categories and location can produce a different experience.

What is a real return?

A real return adjusts nominal investment growth for inflation. It is a better indicator of changes in purchasing power than the nominal percentage alone.

Practical Money Calculators

GUIDE

This is a forward-looking scenario using one constant annual rate. Historical CPI calculators use observed index data; future inflation will vary by year and spending category.

Price growth and purchasing power

Inflation describes a broad increase in prices over time. When prices rise, the same number of dollars buys fewer goods and services, so the purchasing power of cash declines.

The calculator shows both sides of that relationship: the future dollars needed to match a current cost and the future purchasing power of a fixed cash amount.

Use a range of inflation assumptions instead of one forecast.
Apply a longer horizon carefully because compounding magnifies differences.
Consider category-specific price changes for housing, health care, or education.
Compare investment returns after inflation when evaluating real growth.

How this differs from the BLS calculator

The Bureau of Labor Statistics CPI Inflation Calculator compares buying power across historical periods using CPI-U data. This tool instead projects a hypothetical future path from a rate you choose.

CPI is a broad average for urban consumers. An individual's spending mix and local prices can experience a different rate.

Use scenarios for long-term goals

Inflation-adjusting a future expense can make a savings target more realistic. Run a lower, middle, and higher rate to understand how sensitive the goal is to the assumption.

A nominal account balance can rise while real purchasing power grows more slowly. Compare the expected after-fee, after-tax return with inflation when planning long horizons.

The formula used

Future cost = today's cost × (1 + inflation rate)^years

Future purchasing power of today's cash is calculated by dividing the current amount by the same inflation factor. Both calculations assume annual compounding at a constant rate.

Example: ten years at 3%

WORKED EXAMPLE

At a constant 3% annual inflation rate, something costing $1,000 today would cost about $1,343.92 in ten years. Conversely, $1,000 held as cash would have purchasing power equivalent to about $744.09 in today's dollars under the same assumption.

Sources and further reading

We use primary educational sources to check terminology and explain how the calculation fits into real financial decisions.

U.S. Bureau of Labor Statistics — CPI Inflation Calculator↗U.S. Bureau of Labor Statistics — Purchasing power and constant dollars↗

Inflation Impact Calculator

Inflation scenario