🔍 Inflation Calculator

Written by Rohan Mehta Reviewed by Vikram Sen Last updated: January 18, 2026 Last verified: June 1, 2026 · Methodology · Accuracy policy

Inflation percent tracks how much a basket of goods costs over time—align CPI period, geography, and index version before you compare to personal spending.

inflation calculator: use the form labels and formula on this page—confirm part vs whole before you calculate.

Purchasing power over the years. You set a starting dollar amount, an assumed annual inflation rate, and a horizon; the tool sketches how many “real” dollars that sum might represent later if prices rise at that pace. It is a planning illustration, not a CPI official release or COLA calculator tied to a specific index print.

This differs from commission (percent of sales you earn) and from tips (voluntary add-on to a bill). It also differs from salary increase, which models a raise on wages rather than economy-wide price growth.

Enter amount, rate, and years below. For investment contributions with an expected return, use investment growth; for a single CAGR between two balances, use CAGR.

Adjusted Value

$0.00

Purchasing Power Loss:*

Total Price Increase:*

Cumulative Inflation:*

Understanding Inflation

What is Inflation?

Inflation is the rate at which the general level of prices for goods and services rises, causing purchasing power to fall. Central banks attempt to limit inflation to keep the economy running smoothly.

The Formula

Adjusted Price Formula

Adjusted Price = P × (1 + r)^t

P= Original Price

r= Inflation rate (decimal)

t= Number of years

Invest: Stocks and real estate historically outperform inflation.
Monitor CPI: The Consumer Price Index is a key measure of inflation.
TIPS: Treasury Inflation-Protected Securities adjust with inflation.

The Silent Wealth Eroder

Inflation reduces purchasing power over time. Money sitting idle loses value. Understanding inflation impact helps you make informed decisions about saving, investing, and pricing.

Inflation Metrics

CPI (Consumer Price Index): Tracks retail price changes for household goods
Core CPI: Excludes volatile food and energy - shows underlying trend
PPI (Producer Price Index): Leading indicator, measures wholesale prices

The Rule of 72 for Inflation

Divide 72 by inflation rate to find how many years until prices double. At 3% inflation, prices double in 24 years. At 6% inflation, prices double in just 12 years. This demonstrates why long-term savings need growth-oriented investments, not just savings accounts.

Common mistakes

Swapping part and whole: The denominator must be the full total, not a subset.
Rounding too early: Carry extra decimal places through multi-step work before rounding the final percent.
Mixing percent and decimal forms: Enter rates in the format the calculator labels expect.

❓ Frequently Asked Questions

How does this inflation calculator work?

It uses the Consumer Price Index (CPI) to calculate how much value a set amount of money has lost or gained over a specific period.

What is 'Purchasing Power'?

It is the amount of goods or services that one unit of currency can buy. Inflation decrease purchasing power over time.

Why is a little inflation considered good?

Most economists believe a small amount of inflation (around 2% per year) encourages spending and investment rather than hoarding cash.

Worked example

Given: A typical inflation calculator problem with values you can change in the calculator above.

Enter your values in the form and note which field is the rate versus the base or whole.
Apply the formula shown in the quick answer, carrying extra decimal places until the final step.

Answer: The result panel shows the computed value—compare it to your manual work to confirm.

🔍 Authoritative References

For more information about business and financial calculations, consult these trusted sources:

U.S. Small Business Administration - Official resources for business planning and financial management
Bureau of Labor Statistics - Authoritative economic and employment data
Federal Reserve Economic Data - Comprehensive U.S. economic statistics