Online Inflation Adjustment Calculator
Inflation Calculator
Historical CPI Calculator
Inflation Results
Original Amount
$0.00
Starting value
Inflation-Adjusted Amount
$0.00
Total Inflation
0.00%
Cumulative change
Annual Rate
0.00%
Average per year
Summary
Based on official CPI data, $100.00 in Average 2015 has the same purchasing power as $0.00 in August 2025.
Quick Reference
Historical Average
3.0%
U.S. inflation rate
Fed Target
2.0%
Annual target rate
2022 Peak
8.0%
Recent high
2015 Low
0.1%
Recent low
The inflation calculator adjusts a dollar amount for inflation between any two years. It shows the real purchasing power change using the Consumer Price Index (CPI) and reveals how much today's money will be worth in the future at a given inflation rate.
How Inflation Is Calculated
Adjusted Amount = Original Amount x (CPI in Target Year / CPI in Base Year)
For future projections: Adjusted Amount = Original Amount x (1 + Inflation Rate)^Years. Example: $50,000 today at 3% inflation for 20 years = $50,000 x (1.03)^20 = $90,306. You need $90,306 in 20 years to match $50,000 of today's purchasing power.
Purchasing Power of $100 Over Time (3% Annual Inflation)
| Years from Now | Real Value of $100 | You Need to Keep Up |
|---|---|---|
| 5 years | $86.26 | $115.93 |
| 10 years | $74.41 | $134.39 |
| 20 years | $55.37 | $180.61 |
| 30 years | $41.20 | $242.73 |
| 40 years | $30.66 | $326.20 |
Historical US Inflation Rates
| Period | Average Annual CPI Inflation |
|---|---|
| 1970s | 7.1% (peaked at 14.8% in 1980) |
| 1980s | 5.1% |
| 1990s | 2.9% |
| 2000s | 2.6% |
| 2010s | 1.8% |
| 2020-2023 | 4.9% (peaked at 9.1% in June 2022) |
| Long-run average (1913-2024) | ~3.2% |
Why Inflation Matters for Retirement Planning
A $50,000/year retirement income today will have the buying power of $27,500 in 20 years at 3% inflation. To maintain purchasing power, your investments must grow faster than inflation. The standard advice is to use 3% as a long-run inflation assumption when projecting retirement needs. Social Security benefits adjust for inflation annually via COLA adjustments — private pensions often do not.
Frequently Asked Questions
How does inflation affect my savings?⌄
Inflation erodes the purchasing power of cash and low-yield savings. If inflation runs at 3% and your savings account pays 1%, your real return is -2% per year. $100,000 in a 1% account after 10 years of 3% inflation has the buying power of about $83,000 in today's dollars.
What is a normal inflation rate?⌄
The US Federal Reserve targets 2% annual inflation as its long-run goal. The historical average since 1913 is about 3.2%. Inflation averaged around 1.8% in the 2010s before surging to a peak of 9.1% in June 2022. For planning purposes, 2.5-3% is a reasonable assumption.
How do I protect my money from inflation?⌄
Invest in assets that historically outpace inflation: stocks (average 7% real return), real estate, and Treasury Inflation-Protected Securities (TIPS). Avoid holding large amounts in cash or low-yield savings long-term. I-bonds (Series I savings bonds) adjust interest payments directly for CPI changes.
What did $1,000 in 2000 equal in 2024?⌄
$1,000 in 2000 has the equivalent purchasing power of about $1,800 in 2024, based on CPI data. This means prices roughly doubled in 24 years, reflecting an average annual inflation rate of about 2.5% over that period.