Inflation Calculator
Calculate the real value of money over time using historical US CPI data. Adjust for salary growth, future purchasing power, and year-by-year inflation rates.
What is Inflation?
Inflation is the rate at which the general level of prices for goods and services rises over time, resulting in a decrease in purchasing power. When inflation occurs, each unit of currency buys fewer goods and services.
The US Federal Reserve targets a 2% annual inflation rate as ideal for economic growth. Too little inflation risks deflation (falling prices, reduced spending), while too much erodes consumer purchasing power.
Inflation Calculator Formula
How to Use This Inflation Calculator
- General Tab: Enter any dollar amount, select start and end years, and get the inflation-adjusted equivalent.
- Salary Tab: Enter your current salary and expected annual raises to see if your real purchasing power is growing or shrinking.
- Future Value Tab: Enter today's amount and expected inflation rate to see how much you'll need in the future.
- CPI History Tab: Browse the complete US Consumer Price Index from 1980 to 2025.
US Inflation by Decade
| Decade | Avg. Annual Rate | Key Events |
|---|---|---|
| 1980s | 5.6% | Volcker shock, disinflation |
| 1990s | 3.0% | Tech boom, stable growth |
| 2000s | 2.6% | Housing crisis, financial crash |
| 2010s | 1.8% | Recovery, near-zero interest rates |
| 2020s | 4.5% | Pandemic, supply chain, Fed hikes |
Frequently Asked Questions
How does the inflation calculator work?
The inflation calculator uses historical Consumer Price Index (CPI) data from the US Bureau of Labor Statistics. It calculates the equivalent purchasing power of a dollar amount between any two years using the formula: Adjusted Value = Original Amount × (CPI of End Year / CPI of Start Year).
What is CPI and why does it matter?
The Consumer Price Index (CPI) measures the average change in prices over time for a basket of consumer goods and services. It is the most widely used measure of inflation in the United States, published monthly by the Bureau of Labor Statistics.
How do I calculate inflation by year?
Select your start and end years in the 'General' tab, enter your amount, and click Calculate. The tool shows the total inflation rate, annual compound rate, and a full year-by-year breakdown with CPI values.
How does inflation affect my salary?
Use the 'Salary' tab to compare your nominal salary increase to real inflation-adjusted growth. If your salary raises don't keep pace with inflation, your real purchasing power decreases — even if your nominal salary grows.
What is a normal inflation rate?
The US Federal Reserve targets 2% annual inflation as healthy for the economy. Historical average US inflation is around 3.1% per year. Recent years (2021-2023) saw elevated inflation of 4-8% due to post-pandemic supply chain issues and monetary policy.
How do I calculate future value adjusted for inflation?
Use the 'Future Value' tab. Enter today's amount, expected years, and estimated annual inflation rate. The calculator shows how much you'll need in the future to match today's purchasing power.
Is this calculator accurate for India or other countries?
The CPI data used is US-based (BLS CPI-U). For other countries, the inflation rates differ. However, the formula and calculation method is the same — you can manually enter a custom inflation rate in the 'Future Value' tab for any country.
What is purchasing power?
Purchasing power is the value of a currency expressed in terms of the quantity of goods or services that one unit of money can buy. Inflation decreases purchasing power — meaning the same amount of money buys fewer goods over time.