About Free Live Calculators
Our Mission
Free Live Calculators exists for one reason: to give everyone — students, professionals, parents, researchers, and curious minds around the world — access to accurate, free, easy-to-use online calculators.
Too many calculator websites are cluttered, inaccurate, outdated, or inaccessible. We built this platform to be different: every calculator is personally verified, built against official standards, and designed so that a 9th-grade student can use it without confusion.
What We Build
We publish free calculators across every major category:
- Health — BMI, calorie needs, body fat, pregnancy, and more
- Finance — mortgage, loan, investment, compound interest
- Fitness — VO2 max, heart rate zones, macro calculator
- Pet health — puppy weight, pet age, medication dosage
- Math & Science — unit converters, percentage, statistics
- And much more — with new calculators added regularly
Every calculator ships with supporting documentation, step-by-step guides, and educational articles — all internally linked and optimized from day one.
Our Standards
Before any calculator goes live, we verify:
- The formula against an official standard (WHO, NIH, government data, or peer-reviewed research)
- The results against multiple worked examples
- Accessibility — the calculator works with keyboard navigation and screen readers
- Mobile performance — it works perfectly on any device
Accessibility First
We built accessibility features that most calculator sites don't offer: adjustable font sizes, high contrast mode, dyslexia-friendly font, and larger button options. Every visitor deserves a comfortable experience.
The Builder
Free Live Calculators is built and maintained by Bikash Roy, Founder & Online Research Specialist. Every calculator is personally researched, built, and verified.
Contact
Found a bug? Have a calculator suggestion? Want to partner? Get in touch — Bikash Roy personally reads every message.