Free health tools,
built on real science
Evidence-based calculators — no sign-up, no data collection, no cost. Built by people who care about getting the numbers right.
Too many online health calculators use outdated formulas, bury results behind sign-up walls, or surround sensitive health information with intrusive ads. We wanted to do better.
HealthyBMICheck.com is an independent project. We’re not affiliated with any hospital, pharmaceutical company, supplement brand, or health insurer. We have no financial interest in the results our calculators produce — only in making them as accurate and useful as possible.
Every tool on this site uses a formula from peer-reviewed research or established clinical guidelines. We cite our sources, explain the limitations, and tell you what to do with your result.
HealthyBMICheck.com is built and maintained by a single founder — not a clinical team. Every calculator and article is based directly on formulas and guidelines published by WHO, CDC, and NIH, cited throughout the site, rather than on personal medical expertise. This site is for general information only; always check with a qualified healthcare professional for advice specific to you.
| Calculator | Formula / method | Published source |
|---|---|---|
| BMI Calculator | Weight ÷ Height² (kg/m²) | World Health Organization |
| Asian BMI | WHO Asian cutoffs (≥23 overweight) | WHO Expert Consultation, The Lancet, 2004 |
| Kids BMI | CDC BMI-for-age percentile | CDC Growth Charts, Kuczmarski et al., 2000 |
| Calorie Calculator | Mifflin-St Jeor × activity factor | Mifflin et al., Am J Clin Nutr, 1990 |
| BMR Calculator | Mifflin-St Jeor + Harris-Benedict | Mifflin et al., 1990; Harris & Benedict, 1918 |
| Calories Burned | MET × weight × duration | Ainsworth et al., Med Sci Sports, 2011 |
| Protein Calculator | Evidence-based g/kg by goal | Morton et al., Br J Sports Med, 2018 |
| Calorie Deficit | TDEE − deficit; 7,700 kcal/kg fat rule | Hall et al., The Lancet, 2011 |
| Macro Calculator | Mifflin-St Jeor + protein targets | Morton et al., Br J Sports Med, 2018 |
| Ideal Weight | Devine, Robinson, Miller, Hamwi formulas | Multiple sources, 1964–1983 |
| Body Fat | U.S. Navy circumference method | Hodgdon & Beckett, NHRC, 1984 |
| Water Intake | Weight-based hydration guidelines | National Academies of Sciences, 2005 |
| Waist-to-Height | WHtR < 0.5 healthy threshold | Ashwell et al., Obesity Reviews, 2012 |
Not medical advice. Our calculators are population-level estimates for informational purposes only. Individual results may vary. If you have health concerns, consult a qualified healthcare professional.
HealthyBMICheck.com was founded in 2024 by a small team of developers and health researchers. Our team has backgrounds in health sciences, software development, and nutrition research.
Based in Malaysia · Founded 2024 · Contact us
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