Inflation Calculator
Calculate the impact of inflation on the purchasing power of the rupee and adjust prices over time
Inflation Calculator Inputs
Quick Examples
Enter Amount & Years
Fill in the amount and select the time period to see how inflation has affected its value.
Your Results
Detailed Metrics
These results are based on U.S. Consumer Price Index (CPI) data. Actual purchasing power may vary by location and spending category.
How we calculated this
What if?
Each row recalculates with your current inputs. Tap a row to apply it.
Compare two plans
Understanding Inflation
What is Inflation?
Inflation is the rate at which the general level of prices for goods and services rises over time, reducing the purchasing power of money. A moderate inflation rate (around 2%) is considered normal in healthy economies.
How Is It Calculated?
This calculator uses the Consumer Price Index (CPI) to measure price changes between two years. It adjusts your dollar amount forward or backward in time based on the cumulative change in the CPI between the selected years.
What is CPI?
The Consumer Price Index (CPI) tracks the average change in prices paid by consumers for a basket of goods and services including food, housing, transportation, and medical care. It is the most widely used measure of inflation.
Authoritative sources and references
The official standards, guidelines, and research behind this calculator's methodology.
Inflation Calculator FAQ
Why does inflation matter?
Inflation erodes the purchasing power of money over time. $100 today will not buy the same amount of goods in 10 years. Understanding inflation helps with financial planning, investment decisions, salary negotiations, and retirement planning.
What is a "normal" inflation rate?
Central banks like the U.S. Federal Reserve typically target around 2% annual inflation. Rates between 1-3% are generally considered healthy. High inflation (above 5-6%) can significantly impact purchasing power and savings.
Does this calculator account for regional differences?
No, this calculator uses national average CPI data for the United States. Inflation can vary significantly by region, city, and spending category. Your personal experience of inflation may differ from the national average.
How do I adjust money for inflation by hand?
Multiply the old amount by the ratio of CPI values: value then × (CPI now ÷ CPI then). If the index went from 180 to 320, $10,000 from then has the purchasing power of about $17,778 today. The calculator applies exactly this ratio with the official annual CPI-U series.
When was U.S. inflation at its worst?
The sharpest modern episodes were 1917–1920, when annual inflation peaked around 18–20% around World War I and its aftermath, and 1979–1980, when CPI inflation hit about 13–14% before aggressive Federal Reserve tightening broke it. The 2021–2022 surge peaked above 9% — high, but well below those records.
How does inflation eat my savings?
Subtract inflation from your nominal return to get the real return: 4% interest with 3% inflation is only about 1% real growth, and cash earning nothing at 3% inflation loses about a quarter of its purchasing power over a decade. This is why long-horizon savings are usually invested rather than held in zero-interest accounts.
Related Calculators
Mortgage Calculator
Calculate home loan EMI, total interest payable, and amortisation schedules for your property purchase
Loan Calculator
Calculate loan EMI, interest rates, and repayment schedules for personal, home, and vehicle loans
Auto Loan Calculator
Calculate car loan payments with tax, fees, trade-in and down payment. Compare auto loan offers side by side