Inflation Calculator

Calculate the impact of inflation on your purchasing power and future costs. See how inflation affects your money over time.

What Is an Inflation Calculator?

An inflation calculator measures how rising prices reduce the purchasing power of money over time. It answers two questions: what will a current dollar amount cost in the future due to inflation, and how much will today's dollars be worth in future purchasing power.

Understanding inflation is essential for retirement planning, salary negotiations, long-term savings goals, and investment decisions. A dollar today does not buy the same amount of goods in 10 or 20 years.

How the Math Works

Future Cost = Present Value x (1 + Inflation Rate)^Years

Purchasing Power = Present Value / (1 + Inflation Rate)^Years

At 3% annual inflation, $100,000 today will cost $134,392 in 10 years. Conversely, $100,000 held in cash will only buy $74,409 worth of today's goods in 10 years.

How to Use This Calculator

Enter the dollar amount you want to analyze.
Set the annual inflation rate (3% is a common long-term estimate).
Enter the number of years to project.
Review both the future cost and purchasing power along with the year-by-year breakdown.

Worked Examples

Example 1: Retirement Income Needs

Current expenses $60,000/year, 3% inflation, 25 years to retirement. Future annual cost: $125,560. You will need more than double today's expenses to maintain the same lifestyle.

Example 2: College Savings

Current college cost $30,000/year, 4% education inflation, 15 years. Future cost: $54,028 per year. Four years of college will require approximately $216,000 instead of today's $120,000.

Example 3: Purchasing Power Erosion

$500,000 savings, 3% inflation, 20 years. Purchasing power drops to $276,839. You lose over $223,000 in buying power if savings do not grow.

Common Use Cases

Retirement planning: Determine how much you truly need saved when you account for rising costs.
Salary evaluation: Assess whether your raises are keeping pace with inflation.
Investment benchmarking: Compare investment returns against inflation to calculate real returns.
Long-term budgeting: Project future costs of education, healthcare, and housing.

Tips and Common Mistakes

Always plan with inflation in mind. A retirement fund that seems adequate today may fall short by 30 to 40 percent in 20 years if you ignore inflation.

Use real returns for investment planning. Subtract the expected inflation rate from your nominal investment return to get the real return. A 7% investment return with 3% inflation yields only 4% real growth.

Healthcare inflation exceeds general inflation. Medical costs historically rise at 5 to 7 percent annually, much faster than the general CPI. Factor higher rates into health-related planning.

Frequently Asked Questions

What is inflation?

Inflation is the rate at which the general price level of goods and services rises over time, reducing the purchasing power of money. When inflation is 3%, something that costs $100 today will cost $103 next year. The Consumer Price Index (CPI) is the most common measure, tracking price changes for a basket of everyday goods and services.

What is a normal inflation rate?

The Federal Reserve targets 2% annual inflation as healthy for the economy. Historical US inflation has averaged about 3% over the long term. Rates below 1% risk deflation, while rates above 5% are considered high. During 2022-2023, inflation spiked above 8% before gradually declining. Most long-term financial planning uses 2.5 to 3.5% as the assumed rate.

How does inflation affect savings?

Inflation erodes the purchasing power of money held in savings. If your savings account earns 4% interest but inflation is 3%, your real return is only 1%. Money kept in a non-interest-bearing account loses purchasing power equal to the inflation rate each year. This is why investing in assets that outpace inflation is important for long-term wealth preservation.

How does inflation affect retirement planning?

Inflation is critical for retirement planning because costs continue rising while you live on savings. A retiree needing $60,000 per year today will need about $80,000 in 10 years at 3% inflation and $108,000 in 20 years. Retirement plans must account for this by building a buffer or investing in inflation-protected assets.

What is the Rule of 70 for inflation?

The Rule of 70 estimates how many years it takes for prices to double at a given inflation rate. Divide 70 by the annual inflation rate. At 3% inflation, prices double in about 23 years (70 divided by 3). At 5%, prices double in 14 years. This helps visualize the long-term impact of seemingly small annual increases.

What investments protect against inflation?

Treasury Inflation-Protected Securities (TIPS) adjust principal with CPI changes. Real estate typically appreciates with or above inflation. Stocks historically outpace inflation over long periods. I-Bonds earn a rate that adjusts with inflation. Commodities and real assets tend to maintain purchasing power. Cash and fixed-rate bonds lose purchasing power during high inflation.