professional-grade calculators across 6 categories:
💰 Finance — Salary, Loan, Mortgage, Compound Interest, ROI
📊 Business — Break-Even, Pricing, CAC, LTV
❤️ Health — BMI, BMR, Calories, Body Fat
➗ Math — Percentage, Fractions, Averages
⏰ Time — Age, Date Difference, Countdown
🏠 Daily Life — Tip, Discount, Unit Converter
Every calculator is:
✅ Completely free
✅ Works instantly (no signup)
✅ Mobile-friendly
✅ Dark mode supported
✅ SEO-optimized with explanations & FAQs
