About xCalculator
We believe everyone deserves access to accurate, easy-to-use calculation tools — for free, forever.
Our Mission
xCalculator was built with one simple goal: give everyone access to the same high-quality calculation tools that were once locked behind expensive software or paywalls. Whether you're tracking your health, planning a mortgage, or figuring out your tax liability — you deserve fast, accurate answers with zero friction.
We don't require sign-ups, we don't sell your data, and we don't show ads. Our calculators are free because we believe financial and health decisions are too important to be gatekept.
Why xCalculator?
Instant, Everywhere
Served via Cloudflare's global edge network — pages load in milliseconds whether you're in New York, Tokyo, or São Paulo. No spinners, no waiting.
Mobile-First Design
Built for thumbs first, keyboards second. Every calculator is designed to work perfectly on your phone, without pinching, zooming, or squinting at tiny inputs.
Authoritative Formulas
We don't guess. Our health calculators use WHO and CDC standards. Body fat uses the US Navy circumference method. Tax calculators reflect current IRS brackets. Every formula has a source.
Free. No Catches.
No ads. No premium tier. No email required. No data sold. xCalculator is free because your health and financial decisions shouldn't come with a subscription fee.
What We Cover
🏥 Health & Body
- → BMI Calculator (WHO classification)
- → TDEE / Calorie Calculator
- → Body Fat Percentage (US Navy method)
- → Pregnancy Due Date Calculator
- → Ideal Weight Calculator
💰 Finance & Money
- → Compound Interest Calculator
- → Mortgage Payment Calculator
- → US Income Tax Estimator (IRS brackets)
- → Loan Repayment Calculator
- → More tools added regularly
Our Accuracy Commitment
Every formula on xCalculator is sourced from peer-reviewed medical literature, official government standards, or recognized financial institutions. We cite our sources on each calculator page so you can verify the math yourself.
We review and update our calculators whenever standards change — like annual IRS tax bracket adjustments or updated WHO guidelines.