RoyalCalculator
See how the purchasing power of the U.S. dollar has changed over time using official CPI data. Enter an amount from any year (or month) and discover its equivalent value in another period.
| $ Amount in | |
| Has the same buying power as |
| Inflation Multiplier | 1.00x |
| Total Inflation | 0.00% |
A dollar in your pocket today won’t buy the same things a decade from now. That simple truth sits at the heart of inflation — the gradual (sometimes not-so-gradual) erosion of purchasing power as prices climb across the economy.
This tool lets you translate yesterday’s dollars into today’s reality, or project what today’s money might be worth in the future, using both real historical data and straightforward rate assumptions.
The Bureau of Labor Statistics tracks a broad basket of goods and services through the Consumer Price Index (CPI). By comparing CPI values between two periods, we can see exactly how much more (or less) a dollar could buy.
For forward-looking or hypothetical scenarios, we use compound growth:
The same math works in reverse for backward calculations. Historically, long-term U.S. inflation has averaged around 3%, though it fluctuates with economic conditions.
Moderate inflation encourages spending and investment rather than hoarding cash. Too much inflation, however, undermines savings, distorts planning, and can trigger wage-price spirals. Deflation — falling prices — brings its own problems by discouraging consumption as people wait for even lower prices.
The 20th century saw dramatic swings: post-war booms, oil shocks in the 1970s, and the Great Moderation of recent decades. Understanding these patterns helps put current price changes in context.