How Rich Am I? — Global Wealth Calculator

A single-page web app that shows where your income sits on the global wealth spectrum, adjusted for purchasing power and household size.

Live demo: https://jefferyleo.github.io/HowRichAmI/

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Features

• PPP-adjusted ranking — uses Purchasing Power Parity, not the forex rate, for a fair cross-country comparison
• Real World Bank data — percentile lookup against 99 income thresholds from World Bank PIP 2024
• Household equivalization — OECD square root scale accounts for adults and children
• 5 languages — English, Español, Français, 中文, Bahasa Melayu (persisted via localStorage)
• 5 currencies — USD, MYR, GBP, EUR, SGD (currency and country dropdowns stay in sync)
• Animated results — gauge bar, fade-in panel, stat cards
• Explainer panels — collapsible "How is this calculated?" and "What is an International Dollar?" sections
• No frameworks, no build step — plain HTML, CSS, and vanilla JavaScript

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How the Calculation Works

1 · Household Adjustment (OECD Square Root Scale)

Equivalized Income = Annual Income / √(adults + children)

A couple needs less than 2× a single person's income to maintain the same living standard.

2 · PPP Conversion to International Dollars

International Dollars (I$) = Equivalized Income / PPP Rate

PPP rates reflect what your money actually buys locally, not the bank exchange rate.

Currency	PPP Rate (2026 est.)
USD	1.22
MYR	1.76
GBP	0.92
EUR	0.89
SGD	1.26

PPP rates are 2024 World Bank actuals projected to 2026 via IMF CPI estimates (+2.5%/yr for US/MY/UK, +2.0%/yr for EU/SG).

3 · Global Percentile Lookup

Your I$ income is matched against 99 daily income thresholds from the World Bank PIP 2024 survey (covering ~8 billion people):

• Within table: linear interpolation between known percentile thresholds
• Above 99th percentile: log-linear extrapolation from the slope of the last interval

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Data Sources

Data	Source
Global income percentiles	World Bank PIP 2024 via OWID notebooks
PPP conversion factors	World Bank WDI (wdi_ppp.csv), projected to 2026
Methodology reference	Giving What We Can

Note: World Bank PIP 2025 survey data does not yet exist. The most recent income distribution data available is 2024. The OWID version tag 2025-10-09 refers to the September 2025 PIP release, which still contains 2024 income survey results.

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File Structure

HowRichAmI/
├── index.html   # Markup — all visible text uses data-i18n attributes
├── styles.css   # All styles (CSS custom properties, responsive, animations)
└── app.js       # Translations, PPP data, PIP lookup table, calculation logic, i18n

No dependencies, no package manager, no build step required.

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Running Locally

Just open index.html in any modern browser — no server needed.

# Optional: serve with any static file server
npx serve .
# or
python -m http.server 8080

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Supported Languages

Code	Language
en	English
es	Español
fr	Français
zh	中文 (Simplified)
ms	Bahasa Melayu

Language preference is saved to localStorage and restored on next visit. All result text re-renders on language switch without re-triggering animations.

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License

MIT