Calculators.money

357+ privacy-first financial calculators spanning budgeting, mortgages, investments, options pricing, portfolio analytics, retirement planning, and multi-country tax systems — built on React with decimal.js for financial-grade precision.

Full-Stack SoftwareAI Integration

What it is

C alculators.money is a privacy-first financial tools platform with 357+ calculators across 23 categories: budgeting and personal finance, debt and credit, mortgages and housing, savings and goals, everyday money, rates and compounding, inflation and currency, investing basics, portfolio analytics (26 tools including Efficient Frontier, Risk Parity, Value at Risk, and Sharpe/Sortino/Treynor ratios), trading and position sizing, options and volatility (15 tools including Black-Scholes, Options Greeks, implied volatility, and probability of profit), bonds and fixed income, corporate actions and cap tables, business and freelancing, invoicing and fees, pay and taxes (46 tools with country-specific calculators for the US, UK, Canada, and Australia), insurance, cars and transportation, travel money, crypto, financial statement builders, valuation and ratios, and retirement planning (28 tools including FIRE variants, country-specific pension systems, and safe withdrawal rate analysis). Built on React with decimal.js for arbitrary-precision financial arithmetic, Recharts for interactive visualizations, and Framer Motion for UI animations. Every calculator includes educational content — methodology explanations, real-world scenarios, preset examples, common mistakes, and cross-references to related tools. Includes a 444-term financial glossary organized across 14 categories with country-specific flags and calculator cross-links. All computation runs client-side with no data sent to any server. Internationalized into three languages.

What I did

Built 357+ financial calculators across 23 categories — from basic budgeting and tip calculators to institutional-grade portfolio analytics, options pricing, and DCF valuation — using decimal.js for financial-grade arithmetic precision
Built 15 options and volatility calculators including Black-Scholes pricing, Options Greeks, implied volatility, IV Rank/Percentile, probability of profit, and options payoff diagrams — tools typically locked behind brokerage platforms or paid software
Built 26 portfolio analytics tools including Efficient Frontier visualization, Risk Parity, Minimum Variance Portfolio, Value at Risk, correlation stress testing, Jensen's Alpha, and Ulcer Index — institutional-grade analysis made available to retail investors
Built country-specific tax, property, and retirement calculators for the US, UK, Canada, and Australia — including RRSP/TFSA/FHSA (Canada), ISA/SIPP/SDLT (UK), Superannuation/FHSS/franking credits (Australia), and 401(k)/Roth IRA/Social Security (US)
Designed every calculator as an educational resource with methodology explanations, real-world scenarios, preset examples, common mistakes and pitfalls, and cross-references to related tools
Compiled a 444-term financial glossary organized across 14 categories with country-specific flags, searchable navigation, and cross-links to relevant calculators
Built financial statement generators — P&L statements, cash flow statements, balance sheet ratios, and common-size financial statements — bridging the gap between calculators and light accounting software
Internationalized 357+ calculators into three languages with fully localized URLs, translated educational content, and comprehensive hreflang implementation