About Calocalu
Free, accurate health calculators — built to be fast, private, and genuinely useful.
What Calocalu Is
Calocalu is a collection of free health and fitness calculators — BMI, BMR, calorie needs, body fat, hydration, heart rate zones, and more — built to give people fast, private, no-signup-required answers to common health questions.
Why We Built It
Most health calculators online are cluttered with ads, require accounts, or bury the actual tool under walls of content. We wanted the opposite: a fast, clean calculator front and center, with the supporting information available for anyone who wants to understand the formula behind their result.
Our Approach
Every calculator on this site uses an established, publicly documented formula — we don't invent our own methodology or make unverified claims. You can see exactly which formulas we use and why on our Methodology & Sources page.
We are not a medical practice, and our content is not written or reviewed by licensed clinicians. Every tool includes a disclaimer making that clear, and we encourage anyone with a health concern to talk to a qualified healthcare provider.
Privacy First
Calculations run in your browser — you don't need an account to use any calculator on this site. See our Privacy Policy for details on what we do and don't collect.
Get in Touch
Questions, feedback, or found something that doesn't look right? Visit our Contact page — we read every message.