Inflation Calculator

See how inflation affects the purchasing power of your money over time. This tool processes all data locally in your browser. No information is ever sent to any server. Completely free, no registration required.

How to Use the Inflation Calculator

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Inflation Calculator?

An Inflation Calculator shows how the purchasing power of money changes over time due to inflation. In 2026, with US inflation stabilizing around 2.5-3% (down from 2022's 40-year high of 9.1%), understanding inflation's erosion of savings is critical for retirement planning, salary negotiation, and investment strategy. This tool answers questions like: 'What would $100 in the year 2000 be worth today?' and 'If I'm saving $500,000 for retirement in 20 years, how much purchasing power will that actually have?' Inflation silently reduces the value of cash — at 3% inflation, money loses half its purchasing power in about 24 years. This calculator helps you see that invisible erosion clearly.

How Does It Work?

Choose your calculation direction: (1) Forward: see what today's money will be worth in the future at a given inflation rate, or (2) Backward: see what a past amount would be worth today. The core formula is Future Value = Present Value / (1 + inflation rate)^years. For cumulative inflation over multiple years, each year's inflation compounds on the previous year's increased prices.

Formula

Forward (what $X today is worth in Y years):\nFuture Purchasing Power = Present Value ÷ (1 + Inflation Rate%)^Years\n\nBackward (what $X from Y years ago is worth today):\nPresent Value = Past Amount × (1 + Inflation Rate%)^Years\n\nReal Return = (1 + Nominal Return%) ÷ (1 + Inflation%) − 1\n\nRule of 72 for Inflation: Years to Halve Value ≈ 72 ÷ Inflation Rate%

Who Uses This Tool?

• Retirement planners estimating future purchasing power of savings
• Salary negotiators determining whether a raise actually beats inflation
• Investors calculating real (inflation-adjusted) returns on their portfolio
• Historical comparisons — what did a 1950s salary really equal today?
• Budget planners projecting future cost of living increases

Pro Tips

• Focus on 'real return' — your investment return minus inflation. A 7% return with 3% inflation gives only ~3.9% real growth
• Salary raises below inflation rate are effectively a pay cut. If inflation is 3% and you get a 2% raise, your purchasing power dropped 1%
• For retirement: if you need $50,000/year today, at 3% inflation you'll need ~$90,000/year in 20 years to maintain the same lifestyle
• Cash under your mattress loses value every year. Even a high-yield savings account (4-5% in 2026) barely outpaces inflation after taxes

Frequently Asked Questions about Inflation Calculator

What's a normal inflation rate?

The US Federal Reserve targets 2% annual inflation as measured by the PCE (Personal Consumption Expenditures) index. Historically, US inflation has averaged about 3.2% per year since 1914. The CPI (Consumer Price Index) typically runs 0.3-0.5% higher than the PCE.

How does inflation affect my savings?

Inflation erodes the purchasing power of cash savings. $10,000 in a checking account earning 0% interest will only buy about $8,600 worth of goods after 5 years at 3% inflation. That's why long-term savings should be invested in assets that historically outpace inflation (stocks, real estate, I-Bonds, TIPS).

How is inflation measured?

The US Bureau of Labor Statistics (BLS) tracks the Consumer Price Index (CPI), which measures the average price change for a basket of goods and services — housing, food, transportation, healthcare, education, etc. The Fed prefers the PCE (Personal Consumption Expenditures) index, which uses a broader, more flexible basket.

Free online Inflation Calculator — no signup, 100% client-side processing. All data stays in your browser.