About GlobalCalc
29 professional-grade calculators. Free. Private. No sign-up required.
What is GlobalCalc?
GlobalCalc is a collection of 29 precision calculators covering finance, tax, health, business, and cloud infrastructure. Each tool is designed for accuracy, speed, and trust — built on published formulas with cited sources and no hidden assumptions.
The site serves freelancers estimating their rates, small-business owners calculating Amazon FBA margins, individuals planning retirement or repaying debt, and developers sizing cloud infrastructure — across 12 languages and 20+ countries.
Our Principles
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Accuracy over convenience
Every formula is sourced from official publications — IRS, HMRC, WHO, ACOG, or peer-reviewed research. We cite our sources on every page.
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Privacy by default
No accounts, no sign-up, no data storage. Your calculation inputs live only in your browser session and are never sent to our servers for storage.
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Transparency about limitations
Every calculator carries a clear disclaimer. Results are estimates for guidance, not professional financial, medical, or legal advice.
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Multilingual and global
Available in 12 languages: English, German, Spanish, French, Hindi, Bengali, Arabic, Urdu, Turkish, Dutch, Malay, and Japanese.
Tools We Offer
Finance & Tax
- Income Tax (20+ countries)
- Salary / Take-Home Pay
- GST & VAT
- Loan / EMI
- Mortgage & Amortization
- Retirement Nest Egg
- Debt Payoff (Snowball vs Avalanche)
- Compound Interest
- SIP & Fixed Deposit
- Savings Goal
- Inflation
- Currency Converter (150+ currencies)
- Zakat Calculator
Health & Fitness
- BMI (metric & imperial)
- TDEE & Calorie Deficit
- Body Fat % (US Navy method)
- Water Intake & Sleep
- Pregnancy Due Date
Business & Tech
- Freelance Hourly Rate
- ROAS & Marketing ROI
- SaaS Runway & Burn Rate
- Amazon FBA Profit
- Cloud Infrastructure Cost
- Database & Redis Sizing
- Bandwidth & Transfer
- Percentage & Age & Tip
Disclaimer
All calculators on GlobalCalc produce estimates for informational purposes only. Results are based on the inputs you provide and publicly available formulas or rate tables. They do not constitute financial, tax, medical, or legal advice. Tax rates and thresholds change regularly — always verify figures with the relevant official authority or a qualified professional before making decisions.