PPP Calculator — Purchasing Power Parity Exchange Rate
Calculate the Purchasing Power Parity (PPP) exchange rate between two currencies by entering the price of the same basket of goods in each country, then compare it to the actual market rate to see whether a currency is over- or under-valued.
Foreign units per 1 home unit needed for equal purchasing power
- 1
PPP implied rate
85 ÷ 100 = 0,8500Foreign basket price ÷ home basket price gives the exchange rate at which both baskets cost the same. - 2
Over/undervaluation vs market
(1,18 − 0,85) ÷ 0,85 × 100 = 38,82 %
¿Cómo funciona esta calculadora?
PPP exchange rate = basket price in foreign currency ÷ basket price in home currency. If the market rate exceeds the PPP rate, the home currency is overvalued (you get more abroad than purchasing power justifies). Enter basket prices and the market rate to get the implied fair-value rate and the percentage deviation.
Fórmula
How this is calculated
Purchasing Power Parity (PPP) is an economic theory stating that, in the long run, exchange rates should adjust so that identical goods cost the same across countries when prices are expressed in a common currency. The PPP exchange rate is simply the ratio of the price of a reference basket in the foreign country to its price in the home country: if a basket costs £100 in the UK and €115 in Germany, the PPP rate is 1.15 EUR/GBP.
Comparing the PPP rate to the actual (market) exchange rate reveals currency mis-alignment. If the market rate is higher than the PPP rate — meaning you get more foreign currency per home unit on the market than PPP suggests — the foreign currency is undervalued relative to PPP (or equivalently, the home currency is overvalued). The percentage deviation is (market − PPP) / PPP × 100. The Economist's Big Mac Index is the most famous application of this principle, using the price of a Big Mac as the reference basket.
PPP applies most cleanly to traded goods; non-traded services (haircuts, rent) can sustain large price differences indefinitely due to the Balassa–Samuelson effect. Short-term currency movements are dominated by capital flows, interest-rate differentials and speculation rather than PPP. PPP is therefore most useful for long-run fair-value estimates and for comparing GDP across countries in real terms, not for predicting near-term exchange-rate moves.
Preguntas frecuentes
The most rigorous reference is a country's official CPI basket (published by statistical agencies). For a quick illustration, the Big Mac price works well because it is a standardised product sold in ~100 countries. You can also use any single tradable good whose price you know in both currencies.
In the short run, exchange rates are driven by capital flows, interest-rate differentials, inflation expectations, speculation and government intervention — none of which PPP captures. Non-tradable services also maintain permanent price gaps. Currencies can remain mis-aligned from PPP for years or even decades.
When the World Bank or IMF reports GDP per capita in "international dollars" or "PPP terms", they convert each country's GDP using PPP exchange rates rather than market rates, so the result reflects how much a currency actually buys domestically. This gives a more meaningful comparison of living standards than nominal GDP figures converted at market exchange rates.
También conocido como
TG we-Calculate Editorial Team. (2026). PPP Calculator — Purchasing Power Parity Exchange Rate [Online calculator]. TG we-Calculate. https://we-calculate.com/es/calculator/ppp-calculator
TG we-Calculate Editorial Team. "PPP Calculator — Purchasing Power Parity Exchange Rate." TG we-Calculate. 2026. https://we-calculate.com/es/calculator/ppp-calculator.
TG we-Calculate Editorial Team, "PPP Calculator — Purchasing Power Parity Exchange Rate," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/es/calculator/ppp-calculator
@misc{wecalculate_ppp_calculator, title = {PPP Calculator — Purchasing Power Parity Exchange Rate}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/es/calculator/ppp-calculator}}, year = {2026}, note = {TG we-Calculate} }
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