Free Online
Calculators
Instant answers for health, finance & life โ lightning fast, mobile-friendly, scientifically accurate.
Health Calculators
Track body metrics & wellness goals
Calculate your Body Mass Index instantly
Find your daily calorie needs
Navy method body fat estimation
Pregnancy due date calculator
Daily hydration goal
Finance Calculators
Plan budgets, investments & loans
Watch your investment grow
Monthly payment estimator
US & international tax estimator
Plan your financial future
Monthly installment planner
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Try a different keyword, like "BMI", "mortgage", or "tax"
Why xCalculator?
Built for speed, accuracy, and real people.
Lightning Fast
Cloudflare edge network โ results in under 50ms globally
Mobile First
Designed for thumbs, works perfectly on any screen size
Scientifically Accurate
Formulas sourced from WHO and peer-reviewed research
How We Compare
See why thousands choose xCalculator over the alternatives
| Feature | ๐งฎ xCalculator
| Competitors |
|---|---|---|
| โก Speed | โ < 50ms | 1โ3s load |
| ๐ฑ Mobile UX | โ Mobile-first design | Desktop-first |
| ๐ซ Ads | โ Zero ads, ever | Heavy ad load |
| ๐จ Design | โ Clean & modern | Cluttered |
| ๐ Updates | โ Weekly | Rarely updated |