Inflation Calculator

What Is Inflation?

Inflation is the rate at which the general level of prices for goods and services rises, causing each dollar to buy less over time. When inflation is 3% per year, something that costs $100 today will cost $103 next year, and about $134 after ten years. Your purchasing power erodes silently. If your income or savings do not grow at least as fast as inflation, you become poorer in real terms even if the numbers in your account stay the same.

The US inflation rate was 2.7% for calendar year 2025, according to Bureau of Labor Statistics data. For the 12 months ending June 2026, the annual inflation rate was 3.5%, up from 4.2% previously. This uptick reflects ongoing pressure from tariffs and supply chain disruptions. The Federal Reserve's target inflation rate is 2%, and the Fed has maintained the federal funds rate at 3.50% to 3.75% since the beginning of 2026 in response to these conditions.

Understanding inflation is critical for retirement planning, salary negotiation, investment decisions, and long-term budgeting. To see how your savings might grow against inflation, pair this calculator with our Interest Calculator or Retirement Calculator.

What This Calculator Does

This calculator shows how inflation erodes purchasing power over time. Enter an initial dollar amount, an annual inflation rate, and a number of years. The calculator projects the future cost of the same goods and services, and shows how much your current savings would need to grow to maintain the same purchasing power.

Inputs Required

• Current Amount: The dollar value you want to adjust for inflation
• Annual Inflation Rate: The expected average annual rate (use 2.7% for recent US data, or 3.5% for the latest 12-month figure)
• Number of Years: The time horizon for the calculation

Outputs Provided

• Future Cost: What the same goods or services will cost after the specified years of inflation
• Purchasing Power Loss: How much your current dollar amount will be worth in real terms
• Real Purchasing Power: What today's money will actually be worth in the future
• Value Eroded: The percentage of purchasing power lost
• Chart: Visual comparison of nominal cost vs real purchasing power over time

How the Calculation Works

Inflation compounds over time, just like interest. Each year's price increase builds on the previous year's higher base. The formula is:

The Bureau of Labor Statistics measures inflation using the Consumer Price Index (CPI), which tracks the price changes of a basket of goods and services representing typical urban consumer spending. The CPI basket includes housing (33%), transportation (17%), food and beverages (15%), medical care (8%), and other categories. The BLS publishes CPI data monthly, and the annual inflation rate is calculated by comparing the CPI from one December to the next.

How to Use the Calculator

1. Enter the current dollar amount you want to evaluate (e.g., your annual salary, a savings goal, or the cost of a recurring expense)
2. Set the annual inflation rate. For recent US data, use 2.7% (2025 calendar year) or 3.5% (12 months ending June 2026). For long-term planning, the Federal Reserve target of 2% is a conservative baseline
3. Enter the number of years for your projection
4. Review the future cost, purchasing power loss, and the chart showing changes over time
5. Try different inflation rates to see best and worst case scenarios

Example Calculations

Example 1: Retirement Planning Over 25 Years

Michael is 40 years old and wants to maintain his current $60,000 annual lifestyle in retirement at age 65. Using a 3% average inflation rate over 25 years:

• Future cost of $60,000 lifestyle: $60,000 x (1.03)²⁵ = $125,627 per year
• His $60,000 today will only have the purchasing power of about $28,826 in 25 years
• He needs to plan for roughly double his current annual spending to maintain the same standard of living

Example 2: College Cost Projection

Sarah's daughter is 8 years old. Public university tuition and fees currently average $11,000 per year. Using a 5% education inflation rate (college costs have historically risen faster than general CPI) over 10 years:

• Future annual cost: $11,000 x (1.05)¹⁰ = $17,908 per year
• Four-year total: approximately $71,632 in future dollars (not counting room and board)
• She needs to save significantly more than the current sticker price to cover future costs

Example 3: Salary Negotiation

James has earned $85,000 for the last three years without a raise. Cumulative inflation over those three years (2023-2025) was approximately 14.3%. To maintain the same purchasing power, his salary should be $97,155. His real wages have declined by over $12,000 even though his nominal salary stayed flat. This is a concrete number he can bring to a salary negotiation.

Real World Scenarios

Assessing Investment Returns Against Inflation

Karen's investment portfolio returned 6% last year. Inflation was 3.5%. Her real return (nominal return minus inflation) was only 2.5%. If she had kept the money in a savings account earning 0.5%, her real return would have been negative 3%, meaning she lost purchasing power. To grow wealth in real terms, investments must outpace inflation. Use our Investment Calculator to project nominal returns, then subtract inflation to see your real growth.

Long-Term Savings Goal Adjustment

David wants to save $1,000,000 for retirement in 30 years. At 3% average inflation, $1,000,000 in 2056 will have the purchasing power of about $412,000 today. If he wants the equivalent of $1,000,000 in today's dollars, he needs to target approximately $2,427,000. This is why retirement calculators that ignore inflation paint an overly optimistic picture.

Evaluating a Fixed Pension or Annuity

Maria has a pension that pays $3,000 per month with no cost-of-living adjustment. Over 20 years at 3% inflation, the real value of that $3,000 drops to approximately $1,664 in today's dollars. By year 25, it is worth only about $1,437. Fixed payments without COLA adjustments lose significant purchasing power over a long retirement. Social Security, by contrast, includes annual COLA adjustments (2.8% for 2026).

Common Mistakes to Avoid

• Using a single year's rate for long-term projections: Inflation varies year to year. The US experienced 9.1% inflation in June 2022 and 2.7% in 2025. For multi-decade projections, use a long-term average of 2.5% to 3% rather than a single recent year
• Ignoring personal inflation: Your personal inflation rate may differ significantly from the CPI. If you spend heavily on healthcare or education, which rise faster than the general index, your real inflation is higher
• Forgetting that inflation compounds: 3% inflation over 10 years is not 30%. It is 34.4%, because each year builds on the previous year's higher prices
• Not accounting for inflation in investment returns: A 7% nominal return with 3% inflation is a 4% real return. Always compare returns to inflation, not to zero
• Assuming deflation is good: Deflation (falling prices) sounds appealing but can trigger economic recessions, wage cuts, and job losses. Central banks target low positive inflation, not zero, for economic stability

Limitations of This Calculator

This calculator uses a constant annual inflation rate for simplicity. In reality, inflation fluctuates significantly from year to year. The CPI measures urban consumer spending patterns and may not reflect your personal cost of living. Housing costs, which represent a third of the CPI basket, vary enormously by location. A 3% national inflation rate might mean 5% in Tampa and 1.5% in San Francisco. For retirement-specific projections that combine inflation with investment growth and withdrawal rates, use our Retirement Calculator.

Authoritative Research & Resources

• Bureau of Labor Statistics - Consumer Price Index - The official source for US inflation data. The BLS publishes CPI reports monthly, including the All Items index, core CPI (excluding food and energy), and detailed breakdowns by spending category. This is the primary data source for the inflation rates referenced in this calculator.
• Federal Reserve Monetary Policy Report (July 2026) - The Fed's semiannual report to Congress on monetary policy, inflation trends, and economic conditions. Explains the Federal Reserve's 2% inflation target and current federal funds rate decisions.
• US Inflation Calculator - Current Inflation Rates - A comprehensive resource tracking annual US inflation rates from 2000 through 2026, with monthly breakdowns and historical context. Data sourced directly from BLS CPI publications.