About Healthy Calculator Hub
Healthy Calculator Hub is a free collection of health and fitness calculators built to give you fast, accurate, easy-to-understand answers — without the clutter.
What we do
We build simple, reliable tools for the everyday health questions people search for: How many calories do I burn? What are my macros? Is my weight in a healthy range? What's my running pace? Each calculator is designed to load quickly, work on any device, and show both a clear result and a plain-language explanation of what it means.
How we build our calculators
Every tool uses an established, published formula rather than a number we invented. Our calorie and TDEE tool uses the Mifflin-St Jeor equation; body fat uses the U.S. Navy circumference method; one-rep max averages the Epley and Brzycki formulas; and BMI and ideal-weight ranges follow WHO and CDC classifications. Where a health claim appears, we point to reputable sources such as the CDC, NHS, and NIH.
We check each formula against its original source and reputable references before it goes live, and we revisit tools as guidance evolves. If you spot something that looks off, we genuinely want to hear about it — let us know.
Our editorial promise
- Clarity over hype — no fad diets, no miracle claims, no scare tactics.
- Estimates, clearly labelled as estimates, with their limitations explained.
- Both metric and imperial units, for readers everywhere.
- Sources cited for health claims so you can check the science yourself.
A note on medical advice
Healthy Calculator Hub provides general information and estimates for educational purposes only. It is not medical advice and is not a substitute for professional diagnosis or treatment. Always consult a qualified healthcare provider before making decisions about your health, diet, or exercise — especially if you have an existing condition, are pregnant, or are starting a new programme.
Reviewed against CDC, NHS and NIH guidance. Content is reviewed for accuracy against primary sources.