Purchasing Power Parity Calculator

What is Purchasing Power Parity (PPP)?

Purchasing Power Parity (PPP) is an economic framework used to compare economic productivity, real living standards, and relative currency purchasing power across different countries. It measures how much local currency is needed to buy a standardized basket of goods and services in different locations.

The PPP Formula & Implied Exchange Rate

Under absolute purchasing power parity, the exchange rate between two currencies should adjust so that identical goods cost the exact same amount in both locations when priced in a single currency.

The implied PPP exchange rate $S_{ppp}$ between Country A and Country B is calculated as:

Where $P_A$ is the price of the basket of goods in Country A's currency, and $P_B$ is the price of the identical basket in Country B's currency.

Currency Overvaluation vs. Undervaluation

By comparing the implied PPP exchange rate against the actual market exchange rate $S_{market}$, economists determine if a currency is overvalued or undervalued:

If the result is positive, the foreign currency is considered overvalued compared to market rates; if negative, it is considered undervalued.

Comparing Salary & Living Costs Across Borders

Nominal market exchange rates can be misleading when comparing job offers or cost of living internationally. A salary of $60,000 in one country may provide significantly higher purchasing power in a country with lower local prices for housing, food, and services. Utilizing PPP allows remote workers and expatriates to evaluate real equivalent salaries.