Find how much your money buys after inflation, or the income needed to keep pace.
Please do not make financial decisions based on these results.
What is the Buying Power Calculator?
Find how much your money buys after inflation, or the income needed to keep pace. To use the Buying Power Calculator, enter amount today, annual inflation, years; it returns buying power in today’s dollars, loss of buying power, amount needed to match, and shows them instantly as you type.
Where the Buying Power Calculator fits
Find how much your money buys after inflation, or the income needed to keep pace. The main figure it returns is the Buying power in today’s dollars, worked out from the values you enter.
It belongs with the other macroeconomics tools. If you are comparing options or checking a result from another angle, try the PPP Calculator — Purchasing Power Parity, Spending Multiplier Calculator or the Disposable Income Calculator.
How to use the Buying Power Calculator
- Fill in the fields. You will need Amount today ($), Annual inflation (%), Years. Use real figures from your own records where you can. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the Buying power in today’s dollars, and the cards below show Loss of buying power, Amount needed to match. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the Buying Power Calculator using the default values shown in the calculator above:
Inputs
| Amount today ($) | 10,000 |
|---|---|
| Annual inflation (%) | 3.4 |
| Years | 10 |
Results
| Buying power in today’s dollars | $7,158.05 |
|---|---|
| Loss of buying power | 28.42% |
| Amount needed to match | $13,970.29 |
With these inputs the calculator returns Buying power in today’s dollars: $7,158.05. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Amount today ($) from 10,000 to 12,000 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| Buying power in today’s dollars | $7,158.05 | $8,589.66 | +20% |
| Loss of buying power | 28.42% | 28.42% | 0% |
| Amount needed to match | $13,970.29 | $16,764.35 | +20% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the Buying Power Calculator reports Buying power in today’s dollars, loss of buying power and amount needed to match. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. The result is only as accurate as the numbers you enter and the formula shown above. It is for information, not financial, tax or legal advice.
Frequently asked questions
Why does buying power fall?
Rising prices mean each dollar buys fewer goods over time.
Where do the economic inputs come from?
Use official sources such as the BEA, BLS, Federal Reserve, IMF or World Bank for GDP, CPI, unemployment and money supply figures.
Are these tools for students or professionals?
Both. They apply textbook formulas, so they suit coursework and quick policy or market checks.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
Related macroeconomics calculators
- PPP Calculator — Purchasing Power Parity
- Spending Multiplier Calculator
- Disposable Income Calculator
- Discretionary Income Calculator
- GDP Gap Calculator
- Reserve Ratio Calculator
- Comparative Advantage Calculator
- Interest Rate Parity Calculator
- CPI Inflation Calculator – Consumer Price Index
- Real Interest Rate Calculator
- Fisher Equation Calculator
- Fisher Effect Calculator
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