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Free Calculators for Everything

Health, finance, and everyday tools. Instant results, all in your browser.

🏥 Health Calculators 35 free tools Body composition, nutrition, fitness, pregnancy, and general health. Science-backed formulas with instant results.
BMI Calories Body Fat Due Date Sleep + 30 more
Browse health tools → 💰 Finance Calculators 8 free tools Loan payments, interest calculations, investment returns, and retirement planning to help you make smarter money decisions.
Loan / EMI Mortgage ROI Retirement + 4 more
Browse finance tools → 🔢 General Tools 4 tools Everyday calculators for quick answers — percentages, dates, tips, and GPA. Simple, fast, and always free.
Percentage Date Diff Tip GPA
Browse general tools → 📡 Telecom RF Tools 25 free tools RF engineering calculators for 5G, 4G LTE, and wireless network planning. dBm, FSPL, link budgets, throughput, ARFCN, GSCN, TBS, and more.
dBm/Watt FSPL Link Budget EIRP
Browse RF tools → 🔧 Utility Tools 8 free tools Everyday productivity tools — password generator, unit converter, word counter, color picker, time zone converter, and more.
Password Unit Converter Word Counter + 5 more
Browse utility tools → 🔢 Math Tools 3 free tools Scientific calculator, fraction arithmetic, and a full statistics calculator with mean, median, mode, and standard deviation.
Scientific Calc Fractions Statistics
Browse math tools → 💻 Developer Tools 5 free tools Handy utilities for encoding, formatting, and converting data — Base64, JSON formatter, hash generator, Unix timestamps, and px/rem converter.
Base64 JSON Hash Generator + 2 more
Browse dev tools →