About the Author
Soufian Elkaid is the creator, evidence-based content researcher, and health content writer behind TheHealthCalc. He researches publicly available health guidance from organizations such as the CDC, WHO, NHS, NIH, ACOG, and other recognized sources, then translates that information into clear, practical educational content that general readers can understand and use safely.
Soufian is not presented as a licensed physician, dietitian, or healthcare provider. TheHealthCalc content is created for general educational purposes and is based on publicly available health guidance, formulas, and references. It should not be used as a substitute for personal medical advice, diagnosis, treatment, or professional care.
TheHealthCalc was built on a single core idea: health numbers should be understandable to everyone, not just medical professionals. Every calculator, guide, and article on this site is written to explain what a result means, how it is estimated, and when a reader should seek qualified professional support — without overstating what a general educational tool can do.
What Soufian Writes and Researches
Content on TheHealthCalc covers the following areas, each grounded in publicly available guidance from recognized health authorities:
- Body measurements and composition: BMI, body fat percentage, waist-to-hip ratio, ideal weight, and healthy weight estimates — based on CDC and WHO adult screening frameworks.
- Nutrition and energy calculators: Daily calories, macros, protein intake, water needs, BMR, and TDEE — using established formulas such as Mifflin-St Jeor and Harris-Benedict.
- Pregnancy and fertility tools: Due date, ovulation window, period cycle, and pregnancy week calculators — referenced against ACOG and NHS clinical guidance.
- Child and baby health tools: Child age, growth tracking, height prediction, and sleep need calculators — informed by CDC and WHO child growth standards.
- Fitness and performance calculators: VO2 max estimates, calories burned, workout volume, training frequency, recovery needs, and strength estimates — using established exercise science references.
How Content Is Prepared
Each page follows a structured process designed to keep information accurate, safe, and easy to use:
1. Source-first research
Every calculator and article begins with reviewing the relevant clinical guidelines, formulas, public health recommendations, or scientific references from recognized authorities. Health-related claims are supported by credible, traceable sources, especially when discussing formulas, guidelines, result ranges, or safety-sensitive topics. Primary sources are listed at the bottom of each page and on the Sources and References page.
2. Plain-language explanation
Medical and scientific language is rewritten in clear, everyday English. This includes explaining what the formula does, what inputs are needed, how to read the result, and where the estimate has known limitations — so readers can use the tool responsibly without needing a clinical background.
3. Safety framing and limitation disclosure
Every page covering a health-sensitive topic — including body composition, pregnancy, nutrition, child growth, or fitness — includes clear safety notes explaining when results should not be applied directly and when professional advice is the appropriate next step.
4. Pre-publication accuracy check
Before any page is published, the calculator formula, result ranges, source links, safety notes, and written explanations are reviewed for accuracy, readability, and mobile usability. Calculator outputs are tested against known reference values to confirm the formula is applied correctly.
5. Ongoing updates
Pages are updated when formulas, public health guidance, source links, or explanations need improvement. A "Last Updated" date is displayed on every calculator and article page so readers can see when content was most recently reviewed or improved.
Source Standards
TheHealthCalc relies on primary sources from established health and scientific organizations, including:
- World Health Organization (WHO) — global public health definitions, physical activity guidelines, and child growth standards.
- Centers for Disease Control and Prevention (CDC) — adult BMI categories, child and teen BMI-for-age, physical activity guidelines, and pregnancy weight guidance.
- National Health Service (NHS) — UK clinical guidelines for adults, older adults, pregnancy, and child health.
- National Institutes of Health (NIH) / NHLBI / NIDDK — weight management, cardiovascular health, and metabolic health references.
- American College of Obstetricians and Gynecologists (ACOG) — pregnancy and reproductive health guidance.
- Mayo Clinic and MedlinePlus — supplementary plain-language health explanations used alongside primary clinical sources.
A full list of sources is available on the Sources and References page.
Transparency and Editorial Independence
TheHealthCalc may display advertisements to support the operation of the website. Advertising does not influence calculator formulas, result ranges, educational explanations, safety notes, or editorial conclusions. All content decisions are made independently of commercial relationships.
The site does not sell, diagnose, prescribe, or provide personalized medical advice. It does not represent any medical institution, clinic, pharmaceutical company, or health product brand.
For full details on how content is created and maintained, see the Editorial Policy.
Important Medical Notice
All content and calculator results on TheHealthCalc are provided for general educational and informational purposes only. They are not intended to diagnose, treat, prevent, or cure any condition, and they do not constitute medical advice or a professional-client relationship.
Calculator results are estimates based on general formulas and user-provided information. They may not apply to every individual, particularly in cases involving medical conditions, pregnancy complications, eating disorders, chronic illness, injuries, child growth concerns, or any situation requiring qualified professional assessment.
Always consult a qualified healthcare professional for personal medical concerns, symptoms, pregnancy questions, child health concerns, dietary changes, exercise limitations, or urgent situations.
Our Policies
Contact
For questions, corrections, feedback, or calculator issues, please use the Contact page or send an email to soufianelkaid@outlook.com.
Feedback about factual errors, outdated source links, or unclear explanations is especially welcome and will be reviewed for correction where appropriate.
Last updated: May 17, 2026