Inflation Calculator Online (100% Free & Private)
See what money is worth over time at an inflation rate you choose.
Inflation and Purchasing Power Calculator
Rate-based projection: you choose the annual inflation rate. This is not historical CPI data.
Assumes the same inflation rate every year. Real inflation rises and falls. The Federal Reserve targets 2% over the long run, but that is a goal, not a forecast, so try a few rates.
For what actual past prices did, such as what $100 in 1990 equals today, use the official BLS CPI Inflation Calculator .
What costs $1,000.00 today would cost about this at 3% a year.
Year by Year
| Year | Cost of the same purchases | Buying power of starting amount |
|---|---|---|
| 0 | $1,000.00 | $1,000.00 |
| 1 | $1,030.00 | $970.87 |
| 2 | $1,060.90 | $942.60 |
| 3 | $1,092.73 | $915.14 |
| 4 | $1,125.51 | $888.49 |
| 5 | $1,159.27 | $862.61 |
| 6 | $1,194.05 | $837.48 |
| 7 | $1,229.87 | $813.09 |
| 8 | $1,266.77 | $789.41 |
| 9 | $1,304.77 | $766.42 |
| 10 | $1,343.92 | $744.09 |
| 11 | $1,384.23 | $722.42 |
| 12 | $1,425.76 | $701.38 |
| 13 | $1,468.53 | $680.95 |
| 14 | $1,512.59 | $661.12 |
| 15 | $1,557.97 | $641.86 |
| 16 | $1,604.71 | $623.17 |
| 17 | $1,652.85 | $605.02 |
| 18 | $1,702.43 | $587.39 |
| 19 | $1,753.51 | $570.29 |
| 20 | $1,806.11 | $553.68 |
What this tool does and who it is for
This is a rate-based purchasing power calculator. You enter an annual inflation rate, a starting amount and a number of years, and it shows either what today's dollars would cost in the future or what a future amount is worth in today's dollars. A year-by-year table shows how it builds.
The default rate is 3 percent, but it is only your assumption. The tool does not contain Consumer Price Index data, so it cannot tell you what prices actually did in the past.
For official history, such as what $100 in 1990 equals today, use the Bureau of Labor Statistics CPI Inflation Calculator, linked on the page. That is the authoritative source for US consumer prices.
Official Formula / Technical Standard
Real-World Worked Scenario
Entering baseline parameters produces an instant, real-time mathematical breakdown with side-by-side comparative totals.
When people use it
Projecting a future cost
Enter what something costs today and an assumed rate to estimate the price in 10 or 20 years, for example tuition or a retirement expense.
Valuing a future payment
Switch direction to see what a sum you will receive years from now is worth in today's dollars at an assumed rate.
Checking what savings might lose
Compare the buying-power column with your account's interest rate. If inflation is higher than your return, purchasing power falls even as the balance rises.
Stress-testing a budget
Run 2, 3 and 5 percent to see how sensitive a long-term plan is to the rate you assume.
Notes for US users
- The US government measures inflation with the Consumer Price Index from the Bureau of Labor Statistics. The Federal Reserve's long-run goal is 2 percent, but that is a target rather than a forecast.
- Social Security benefits get a cost-of-living adjustment based on CPI, which helps protect some retirement income.
- Personal inflation depends on what you buy. Housing, healthcare and tuition have often moved differently from the overall index.
Limits and what to double-check
- •No historical CPI data is included. This is a projection from the rate you type, not a record of actual prices.
- •The same rate is applied every year, while real inflation moves around.
- •Rates from minus 50 to 100 percent and up to 100 years are accepted. A negative rate models falling prices.
- •It measures general purchasing power only and ignores taxes, wage growth and investment returns.
Expert Best Practices & Common Pitfalls
Recommended Best Practices
- •Verify input values against your latest financial statements or tax documents.
- •Model best-case, average-case, and conservative scenarios to understand financial variability.
- •Review long-term interest costs and compounding schedules before committing to large loans.
Common Mistakes to Avoid
- •Using outdated tax rates or interest assumptions from previous calendar years.
- •Forgetting secondary expenses like closing fees, maintenance, or local taxes.
- •Relying on rough estimates rather than calculating exact monthly amortizations.
Features & Security Architecture
- 100% Client-Side: Zero server uploads ensure complete privacy and data confidentiality
- Fast Results: Processing happens on your own device, so there is no upload or server queue to wait for
- No Sign-Up Required: Completely free to use with no daily usage caps or account requirements
- Works on All Devices: Fully responsive across desktop, tablet, and mobile browsers
Frequently Asked Questions
How does the Inflation Calculator work?▼
The Inflation Calculator runs 100% inside your web browser using modern client-side JavaScript. It performs calculations, conversions, and document processing locally on your device without sending any data to external servers.
Is this inflation calculator completely free to use?▼
Yes. This tool is completely free with no usage limits, no subscriptions, and no registration required.
Is my data private when using the Inflation Calculator?▼
Yes. Because all operations execute locally on your computer or phone, your inputs, documents, and data never leave your browser.
Can this tell me what $1,000 in 1980 is worth today?▼
No. That needs actual historical CPI data, which this tool does not contain. The Bureau of Labor Statistics runs an official CPI inflation calculator for that purpose.
What inflation rate should I assume?▼
Many planners use around 2 to 3 percent for long-term estimates, but actual inflation has been higher and lower in different years. Try a range of rates rather than relying on one number.
What is the formula?▼
Future cost = amount x (1 + rate)^years. Today's value of a future amount = amount / (1 + rate)^years. At 3 percent over 10 years the price multiple is about 1.344.
How do I find real return after inflation?▼
A close shortcut is nominal return minus inflation. The more exact method divides one plus the return by one plus inflation, then subtracts one. At 5 percent return and 3 percent inflation, real growth is about 1.9 percent.
Why does my grocery bill feel higher than the CPI?▼
The CPI is an average across a basket of goods. Your own spending mix can differ, and categories like food, rent or insurance can climb faster than the average.