Compare the price of the same goods in two countries to find the PPP rate.
Please do not make financial decisions based on these results.
What is the PPP Calculator — Purchasing Power Parity?
Compare the price of the same goods in two countries to find the PPP rate. To use the PPP Calculator — Purchasing Power Parity, enter price of basket in country a, price of basket in country b, market exchange rate; it returns ppp exchange rate, b currency over/undervalued by, and shows them instantly as you type.
Where the PPP Calculator — Purchasing Power Parity fits
Compare the price of the same goods in two countries to find the PPP rate. The main figure it returns is the PPP exchange rate, 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 Interest Rate Parity Calculator, Buying Power Calculator or the Inflation Rate Calculator.
How to use the PPP Calculator — Purchasing Power Parity
- Enter your numbers. The inputs are Price of basket in country A (local), Price of basket in country B (local), Market exchange rate (A per B). 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 PPP exchange rate, and the cards below show B currency over/undervalued by. 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 PPP Calculator — Purchasing Power Parity using the default values shown in the calculator above:
Inputs
| Price of basket in country A (local) | 120 |
|---|---|
| Price of basket in country B (local) | 80 |
| Market exchange rate (A per B) | 1.4 |
Results
| PPP exchange rate | 1.5 |
|---|---|
| B currency over/undervalued by | 7.14% |
With these inputs the calculator returns PPP exchange rate: 1.5. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Price of basket in country A (local) from 120 to 144 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| PPP exchange rate | 1.5 | 1.8 | +20% |
| B currency over/undervalued by | 7.14% | 28.57% | +300% |
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 PPP Calculator — Purchasing Power Parity reports PPP exchange rate and b currency over/undervalued by. 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
What is PPP used for?
Comparing living costs and judging whether currencies are over or undervalued.
Are these tools for students or professionals?
Both. They apply textbook formulas, so they suit coursework and quick policy or market checks.
What is the difference between nominal and real GDP?
Nominal GDP uses current prices; real GDP removes price changes using a deflator so output can be compared over time.
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.
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