Calculate PPP-equivalent income between countries using PPP factors and currency exchange rates, or find a parity ratio from group A and B counts.
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Parity Ratio Formula
The calculator provides PPP income estimates and three count-ratio solves.
PPP salary mode and Custom PPP mode use the same conversion:
Count ratio mode uses:
- Source Income: salary in the origin country, annual or monthly.
- Source PPP: purchasing power parity factor for the origin country, in local currency per international dollar.
- Target PPP: PPP factor for the destination country.
- Target Income: equivalent income in the destination country's currency.
- Group A, Group B: counts of the two groups being compared (often males and females, or enrolled students by category).
Choose a PPP income mode or the count value to solve for. Country factors use World Bank household/NPISH consumption data for 2025, retrieved October 9, 2026. Euro area has no factor in this dataset and requires a supplied factor. Custom PPP values must share the same year, consumption series and international-dollar base.
Reference Tables
World Bank 2025 PPP conversion factors for household and NPISH consumption, in local currency units per international dollar (rounded below). Source: World Bank PA.NUS.PRVT.PP, retrieved October 9, 2026. These national averages do not predict a household’s specific costs.
| Country | Currency | PPP factor |
|---|---|---|
| United States | USD | 1.000 |
| United Kingdom | GBP | 0.702 |
| Germany | EUR | 0.719 |
| Australia | AUD | 1.465 |
| Japan | JPY | 103.337 |
| India | INR | 19.839 |
| China | CNY | 3.460 |
| Brazil | BRL | 2.581 |
How to read a count ratio (A ÷ B). UNESCO’s 0.97–1.03 education parity band applies to ratios of indicator values, often rates, rather than establishing parity from raw counts:
| Ratio | Interpretation |
|---|---|
| Below 1 | Fewer Group A than Group B |
| 1 | Equal group counts |
| Above 1 | More Group A than Group B |
Examples and FAQ
Example 1: Salary move from the US to India. You earn $80,000 per year in the United States and want the equivalent purchasing power in India. Using the full-precision 2025 PPP factors of 1.000 and 19.8389160640447:
Target Income = 80,000 × (19.8389160640447 / 1.000) ≈ ₹1,587,113.29 per year.
Example 2: Gender parity in enrollment. A school enrolls 480 girls and 500 boys. The count ratio is 480 / 500 = 0.96, or 96 girls per 100 boys. Equal participation cannot be inferred without the eligible female and male populations and corresponding enrollment rates.
Why does PPP differ from the exchange rate? Exchange rates respond to capital flows, interest rates, and trade. PPP reflects what a basket of goods actually costs locally. The two often diverge, especially between high-income and low-income countries.
Where do PPP factors come from? The World Bank's International Comparison Program publishes them, and the IMF and OECD republish their own series. Values update yearly.
Which group goes on top in a parity ratio? Define Group A as the numerator and Group B as the denominator and use that convention consistently. UNESCO education gender parity indices use female indicator values divided by male indicator values; raw counts may differ from rate-based comparisons.
Can the parity ratio exceed 1? Yes. A ratio above 1 means Group A outnumbers Group B. A value of 1 means equal counts.
