Inflation Calculator
Use our free online Inflation Calculator to perform fast, accurate calculations with instant formulas, step-by-step arithmetic, and verified reference benchmarks.
CPI Inflation & Buying Power Calculator
$100 in 1970 has the same buying power as $819.59 in 2026.
How to Calculate: The Inflation Calculator Formula
Utilizes the United States Bureau of Labor Statistics (BLS) Consumer Price Index for All Urban Consumers (CPI-U) to calculate relative purchasing power across historical eras.
Step-by-Step Calculation Guide
- Enter an initial monetary dollar amount.
- Select the reference starting year (from 1913 to 2026).
- Select the comparison target year.
- The engine computes exact adjusted value, percentage cumulative inflation, and average annual inflation rate.
Practical Inflation Calculator Examples
Determining how much $100 from 1970 is worth in today's purchasing power.
Adjusting median 1980 home price of $65,000 for inflation.
Historical Purchasing Power of $100 Across the Decades
Official reference values and benchmark classifications based on standard institutional guidelines.
| Decade / Year | Buying Power in 2026 Dollars | Cumulative Inflation Since Year | Average Annual Inflation |
|---|---|---|---|
| 1950 | $1,320.00 | +1,220% | 3.5% |
| 1970 | $820.00 | +720% | 3.9% |
| 1980 | $386.00 | +286% | 3.0% |
| 1990 | $243.00 | +143% | 2.5% |
| 2000 | $185.00 | +85% | 2.4% |
| 2010 | $146.00 | +46% | 2.4% |
| 2020 | $123.00 | +23% | 3.5% |
Frequently Asked Questions about Inflation Calculator
What is the Consumer Price Index (CPI)?
The CPI is a monthly economic measure compiled by the US Bureau of Labor Statistics that tracks average changes in prices paid by urban consumers for a standardized basket of goods and services.
How does inflation affect cash savings?
Inflation directly diminishes the purchasing power of idle cash. If inflation averages 3% per year, uninvested cash loses approximately half its buying capacity in 24 years.
What investments historically beat inflation?
Broad stock market index funds (S&P 500), real estate assets, Treasury Inflation-Protected Securities (TIPS), and productive businesses have historically outpaced inflation.
What caused the high inflation of 2021–2023?
A combination of global supply chain bottlenecks, massive pandemic stimulus liquidity, and sharp energy price shocks caused global inflation spikes.