Inflation Calculator
Calculate how inflation affects purchasing power over time
Settings & input
Your inputs are never uploaded or stored.
Results
Enter your values to see the results.
About Inflation Calculator
Our free inflation calculator shows what a sum of money is worth after years of inflation, or what an old price equals in today's money. Enter an amount, an annual rate, and a number of years to see the future value of your savings or the buying power of a past salary, with a year-by-year table of value lost and cumulative inflation.
The calculator uses the standard compound inflation formula to compute how prices rise over time. In Future Value mode, it shows how much less your money will buy as prices increase. In Buying Power mode, it reveals how much more money you would need today to match the spending power of a given amount from the past. Both modes display cumulative inflation, purchasing power loss, and a complete annual breakdown.
With a customizable annual inflation rate and flexible time period, this tool is ideal for retirement planning, salary negotiations, investment analysis, and personal budgeting. Results appear instantly, and nothing you enter is uploaded.
Key Features
- Two calculation modes: Future Value mode shows how inflation reduces your purchasing power, while Buying Power mode shows what you would need today to match past purchasing power
- Customizable inflation rate: Set any annual inflation rate to model different economic scenarios, from low inflation to hyperinflation
- Flexible time period: Calculate inflation impact over any number of years, from 1 year to several decades
- Cumulative inflation display: See the total percentage of inflation accumulated over the entire period
- Purchasing power loss: Instantly see the dollar amount of purchasing power lost or additional cost required
- Year-by-year breakdown table: Detailed annual table showing value, loss, annual rate, and cumulative inflation for each year
- Real-time calculations: Results update instantly as you type, with no need to click a calculate button
- Clean, responsive design: Works perfectly on desktop, tablet, and mobile devices
- Dark mode support: Comfortable viewing in any lighting condition
- Editable default rate: The rate field starts at 3% per year; replace it with the published rate for your country or period
How to Use the Inflation Calculator
- Select a mode: Choose Future Value to see what your money will be worth in the future, or Buying Power to see what a past amount would cost today.
- Enter the amount: Type the dollar amount you want to analyze (e.g., $1,000, $50,000, or $100,000).
- Set the inflation rate: Enter the expected annual inflation rate as a percentage. The default is 3%, which is close to the long-term historical average in the United States.
- Enter the time period: Specify the number of years over which you want to calculate inflation impact.
- Review the results: View the adjusted amount, purchasing power lost, and cumulative inflation percentage in the results panel.
- Examine the breakdown: Scroll down to see the year-by-year table showing how values change each year over the selected period.
Understanding the Formulas
Future Value Mode
Adjusted Value = Amount / (1 + Rate)^Years. This formula divides your current amount by the compound inflation factor to show the real purchasing power of that money in the future.
Buying Power Mode
Adjusted Value = Amount x (1 + Rate)^Years. This formula multiplies the past amount by the compound inflation factor to show how much you would need today to have the same buying power.
Cumulative Inflation
Cumulative Inflation = ((1 + Rate)^Years - 1) x 100. This shows the total percentage increase in prices over the entire period, accounting for the compounding effect.
Use Cases
- Retirement planning: Estimate how much your retirement savings will actually be worth in 20 or 30 years to ensure you save enough to maintain your lifestyle.
- Salary negotiations: Calculate whether a proposed raise actually outpaces inflation or if your real purchasing power is declining.
- Investment analysis: Determine the real return on investments by subtracting the inflation rate from the nominal return.
- Real estate evaluation: Compare historical property prices to current values after accounting for inflation to assess true appreciation.
- Education cost planning: Project future college tuition costs to determine how much to save in education funds today.
- Contract pricing: Set long-term contract prices that account for inflation to protect profit margins over multi-year agreements.
- Historical comparisons: Understand the real value of past prices, wages, or costs when adjusted for inflation.
- Budget forecasting: Project future living expenses to create realistic long-term budgets that account for rising costs.
Frequently Asked Questions
What inflation rate should I use?
The default rate of 3% approximates the long-term historical average in the United States. For more conservative estimates use 2%, and for higher-inflation scenarios use 4-6% or more. Check your country's central bank data for the most current rates.
What is the difference between Future Value and Buying Power modes?
Future Value shows how inflation will reduce the purchasing power of money you have today. Buying Power shows how much money you would need today to equal the purchasing power of a given amount from the past. They are essentially the same formula applied in opposite directions.
Does this account for variable inflation rates?
This calculator uses a fixed annual rate applied consistently over the entire period. For analyses requiring different rates each year, you can run multiple calculations for shorter periods and combine the results.
Can I use this for currencies other than USD?
Yes. While the tool displays dollar signs, the math works identically for any currency. Simply enter your amount in your local currency and use the inflation rate relevant to your country.
Tips & Best Practices
- Use realistic inflation rates: While 3% is a good historical average, consider using higher rates for healthcare, education, or housing costs which often outpace general inflation.
- Compare multiple scenarios: Run calculations with different inflation rates (2%, 3%, 5%) to see a range of possible outcomes for better financial planning.
- Factor inflation into investments: Subtract the inflation rate from your expected investment return to calculate the real rate of return on your portfolio.
- Review the year-by-year table: The breakdown table helps visualize how inflation compounds over time, with the impact accelerating in later years.
- Use for salary planning: If your annual raise does not at least match inflation, your real purchasing power is declining even though your nominal salary increases.
- Consider category-specific inflation: Healthcare, education, and energy costs often inflate at rates significantly different from the overall Consumer Price Index.