About All Calculator
All Calculator is a free online calculator hub built for one purpose: to give you accurate, instant answers to everyday calculations without the friction. No accounts, no paywalls, no invasive tracking, and no waiting on a server. Every one of our 75+ tools runs entirely in your browser, so your inputs never leave your device.
What we offer
We cover six categories — financial (mortgage, loan, EMI, compound interest, ROI, retirement), health and fitness (BMI, calorie, body fat, macros, pregnancy timing), math (percentage, fraction, scientific, statistics), date and time (age, date difference, working days, time zones), unit converters (length, weight, temperature, data storage), and other everyday tools (GPA, password generator, word counter, Roman numerals).
Our principles
- Free forever. Every calculator is free to use, with no hidden fees or limits.
- Private by design. Calculations happen client-side. We don't send your numbers anywhere.
- Fast. Static pages and minimal JavaScript keep everything snappy, even on mobile data.
- Universal. The site works on any modern phone, tablet, or desktop.
How we make it free
All Calculator is supported by display advertising, which lets us keep every tool free for everyone. Ads are clearly labeled and never interfere with the calculations. Tools marked as educational references standard, widely accepted formulas — they are not professional financial, legal, or medical advice.
Got a question, found a bug, or want a new calculator? Reach out — we'd love to hear from you.