Hi Product Hunt! 👋 I built CalcHub because existing calculator sites look like they're from 2005 and none of them work well globally. What makes CalcHub different: 🌙 Dark mode (zero competitors have this) 🎤 Voice input — say "five thousand" to fill fields 📊 32 calculators across Finance, Health, Math, Utility 💱 37 currencies auto-detected from timezone ⚖️ Compare mode — side-by-side scenarios (EMI 15yr vs 30yr) 📥 PDF + CSV export on every calculator 🔗 Shareable URLs with pre-filled values 📴 PWA — works offline, installable on mobile ⌨️ Keyboard shortcuts (Esc=reset, Ctrl+S=share, Ctrl+P=PDF) 📚 Calculation history saved in browser (no signup) 🌍 Works worldwide — auto-detects country/currency All 32 calculators: Financial: EMI, SIP, Mortgage, Compound Interest, Income Tax (India/US/UK), GST/VAT, Salary, Currency, Retirement, Loan Eligibility, Savings Goal, Investment, Inflation, CAGR, Break-Even, Profit Margin Health: BMI, Calorie/TDEE, Pregnancy Due Date, Body Fat, Water Intake, Heart Rate Zones Math: Percentage, Discount, Scientific Calculator Utility: Age, Tip, Fuel Cost, Date, Time Zone, GPA, Unit Converter No signup. No limits. No paywalls. Monetized through ads only. Would love feedback — which calculator should I build next?

CalcHub

32 free calculators with dark mode, voice input & PDF export

32 free calculators with dark mode, voice input & PDF export