🏥 HealthCalcPro

Free, Clinician-Reviewed Health Calculators — Accurate Results in 30 Seconds

BMI · Calorie/TDEE · Body Fat · Macro · Weight Loss · Ideal Weight · Heart Rate · Sleep · Blood Pressure · Water Intake · Pregnancy

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100% Free · No Registration · Clinician-Reviewed · 100% Private · Ad-Light

Evidence-based self-knowledge should be a public utility — not a product.

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📋 Table of Contents

• About HealthCalcPro
• The Problem We Solve
• Platform at a Glance
• Calculators
  • Body Composition
  • Nutrition
  • Performance
  • Life Stages
• Health Tools & Experiences
• AI Store — Premium Digital Products
• Scientific Methodology
• Scientific Sources
• Tech Stack
• Privacy & Trust
• Health Guides
• Video Explainers
• Founder
• Brand Network
• Official Channels & Entity Stack
• Schema.org Structured Data
• Contact
• Medical Disclaimer

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🏥 About HealthCalcPro

HealthCalcPro is an independent, privacy-first health calculator platform that transforms peer-reviewed medical formulas into fast, accessible web tools anyone can use in under 60 seconds.

Most wellness decisions start with a simple question: "What do these numbers mean for me?" Too often, the answer lives behind a paywall, inside a confusing clinical PDF, or buried under pop-ups and supplement ads. We believe evidence-based self-knowledge should be accessible to everyone — free, private, and honest.

HealthCalcPro is built and maintained by a named, reachable person — not an anonymous content farm. Every formula is sourced from peer-reviewed research, every calculation runs entirely in your browser, and every clinical claim is linked to its primary reference.

Our mission: If you can ask Google a number question about your body, you should be able to get an honest, ad-light, peer-reviewed answer here in under 60 seconds. No accounts, no tracking pixels, no dark patterns.

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🔍 The Problem We Solve

Search "BMI calculator" or "calorie calculator" online and you'll find hundreds of options. Most share the same problems:

Problem	What We Do Instead
Require email signup to see results	Zero registration — results are instant
Store your health data on unknown servers	100% client-side — nothing leaves your device
Use unnamed or outdated formulas	Every formula is named, peer-reviewed, and cited
Surround results with supplement ads	Ad-light design — no supplement upsells
Give you a raw number without context	Plain-English interpretation with actionable next steps
Hide behind paywalls or "premium" tiers	100% free — every feature, every calculator, forever

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📊 Platform at a Glance

Metric	Value
Calculators	12+ clinician-reviewed
Monthly Users	10,000+
Countries Reached	150+
Calculations Performed	500,000+
User Rating	4.9/5
Cost	100% Free
Privacy	100% Client-side — zero data stored
Registration	Never required
AI Store Products	19+ premium tools
Health Guides	In-depth evidence-based articles
Languages	English (global)
PageSpeed Target	100/100
Accessibility	WCAG 2.2 compliant

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🔬 Calculators (12+)

Every calculator uses peer-reviewed formulas and delivers personalized guidance — not just a number.

Body Composition

Calculator	What It Does	Formula Source	Link
BMI Calculator	Calculate Body Mass Index and compare BMI vs WHR for a fuller health picture	WHO Obesity Standards	Open →
Body Fat Calculator	Estimate body fat percentage using Navy and BMI methods with personalized recommendations	U.S. Navy Method / Jackson-Pollock	Open →
Ideal Weight Calculator	Find your healthy weight range using four clinician-reviewed formulas	Devine, Robinson, Miller, Hamwi	Open →

Nutrition

Calculator	What It Does	Formula Source	Link
Calorie/TDEE Calculator	Calculate your TDEE and BMR to hit weight loss, maintenance, or muscle gain targets	Mifflin-St Jeor (1990)	Open →
Macro Calculator	Precision macro planning — protein, carbs, and fats matched to your goals	USDA Dietary Guidelines	Open →
Weight Loss Calculator	Build a realistic weight loss timeline with weekly milestones and progress tracking	Evidence-based deficit models	Open →
Water Intake Calculator	Get daily hydration goals based on weight, activity level, and climate	IOM Adequate Intake	Open →

Performance

Calculator	What It Does	Formula Source	Link
Heart Rate Calculator	Find your resting heart rate, HRR, and personalized training zones	ACSM / Karvonen Method	Open →
Sleep Calculator	Plan optimal bedtimes and wake windows around your 90-minute sleep cycles	Sleep cycle research	Open →
Blood Pressure Calculator	Interpret your BP readings and get expert heart health guidance	AHA / CDC Categories	Open →

Life Stages

Calculator	What It Does	Formula Source	Link
Pregnancy Calculator	Track due dates, trimesters, weight gain, and baby development milestones	ACOG Guidelines	Open →

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🧠 Health Tools & Experiences

Beyond single calculations — these tools give you a complete picture of your health.

🧬 Health Age Quiz — Most Loved

Answer 12 research-backed questions to discover your biological age and get a personalized longevity action plan. Takes under 5 minutes. Shareable results with goal tracking. Updated with 2025 longevity research.

→ Take the Health Age Quiz

📊 Personal Health Dashboard — New for 2026

Combine multiple calculator results into a living wellness plan with trend analysis, alerts, and expert tips. Overall health score updated after every calculator. Recommendations matched to your goals. Weekly progress tracking across body, nutrition, and sleep.

→ Open the Dashboard

📋 Health Report

Generate a comprehensive personal health report based on all your calculator results in one document.

→ Generate Report

🏋️ AI Workout Builder

Get personalized exercise plans powered by AI, tailored to your fitness level, available equipment, and specific goals.

→ Build Your Workout

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🛒 AI Store — Premium Digital Products

Premium Claude Code skills, AI agents, and automation tools for developers and entrepreneurs. These products fund the ongoing development of the free calculators.

Product	Category	Price	Link
Indie Game Studio Kit	27 AI Agents (Godot 4, Unity 6, Unreal 5)	$39	View →
AI Content Empire Builder	8 Content Skills	$29	View →
Startup Launch Arsenal	10 Founder Skills	$39	View →
iOS 26 Liquid Glass UI Kit	5 UI Skills, 67 Styles	$29	View →
Conversion Rate Domination Suite	8 CRO Skills	$29	View →
AI Agency Launch Kit	37 Skills + 5 Agents	$119	View →
AI SEO Command Suite	30+ SEO Skills	$69	View →
Structured Data Pro Pack	6 JSON-LD Templates + 2 Skills	$19	View →
AI Content Blueprint	14-Section Article Framework	$29	View →
AI Search Visibility Toolkit	11 GEO Skills + 5 Agents	$49	View →
CodeForge	14 Agent Plugin Modules	$19+	View →
MarketFlow AI	11 Marketing Systems, 42+ Scripts	$29+	View →
ShortFactory AI	Automated YouTube Shorts Pipeline	$29+	View →
AutoEarnAI	4 AI Automation Tools	$27+	View →
Visa Document Translator	50+ Language Translation Tool	$9	View →
Humanizer Pro	3 AI Detection Removal Skills	$19	View →
Podcast to Empire Kit	5 Skills, 12 Content Formats	$29	View →
AI CFO Toolkit	3 Financial Clarity Skills	$29	View →
B2B Growth Machine	11 AI Growth Systems	$49	View →

→ Browse All 19 Products in the AI Store

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📐 Scientific Methodology

Every calculator on HealthCalcPro follows a rigorous 6-step editorial and engineering process:

Step 1 ─ SOURCE
│   Named, peer-reviewed formula from a primary source
│   (WHO, CDC, NIH, ACSM, ACOG, etc.)
│   We never invent coefficients.
│
Step 2 ─ IMPLEMENT
│   TypeScript with unit tests validating against
│   published examples from the original paper.
│   Metric + Imperial. Rounding per original conventions.
│
Step 3 ─ CLINICIAN REVIEW
│   Math, copy, and interpretation ranges reviewed
│   against current clinical guidelines.
│   Ambiguities flagged in plain English.
│
Step 4 ─ PRIVACY CHECK
│   100% client-side browser computation verified.
│   Zero POST requests. Zero data transmission.
│   Keyboard navigation + screen reader labels tested.
│
Step 5 ─ PLAIN-ENGLISH INTERPRETATION
│   Every result paired with jargon-free explanation,
│   source link, and practical next steps.
│   No fear-mongering. No supplement upsells.
│
Step 6 ─ SCHEDULED RE-REVIEW
    Annual check against latest published guidelines.
    When WHO/CDC/NIH updates a threshold, we update
    the tool and note the change in commit history.

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📚 Scientific Sources We Rely On

A non-exhaustive list of the primary references behind our calculators:

Source	What We Use It For	Link
World Health Organization (WHO)	BMI categories, child growth standards, global obesity thresholds	who.int →
U.S. Centers for Disease Control (CDC)	Adult BMI ranges, blood pressure categories, physical activity guidelines	cdc.gov →
National Institutes of Health (NIH/NHLBI)	Obesity education, waist-to-hip ratio, cardiovascular risk factors	nhlbi.nih.gov →
Mifflin-St Jeor equation (1990)	Basal Metabolic Rate — the modern default for adult RMR estimation	PubMed →
Harris-Benedict equation (revised 1984)	Historical BMR formula, offered for comparison	PubMed →
Jackson-Pollock skinfold equations	Body fat percentage estimation from measurements	PubMed →
American College of Sports Medicine (ACSM)	Heart-rate training zones, exercise prescription, VO₂ max	acsm.org →
U.S. Dietary Guidelines for Americans	Macronutrient ranges, calorie needs by age and activity	dietaryguidelines.gov →
American College of Obstetricians (ACOG)	Pregnancy due dates, trimester milestones, weight gain	acog.org →
American Heart Association (AHA)	Blood pressure classification and guidelines	heart.org →

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⚙️ Tech Stack

Frontend & Framework

Backend & Database

Deployment & Infrastructure

Architecture Highlights

• App Router with Server Components — minimal JS shipped to client
• Client-side only computation — all health calculations run in the browser
• 100/100 PageSpeed Insights target across all calculator pages
• WCAG 2.2 accessibility compliance
• Mobile-first responsive design — 63% of traffic from mobile
• WebP/AVIF image optimization with lazy loading
• Zero third-party scripts on calculator pages
• Schema.org JSON-LD structured data on every page
• No WordPress, no templates — every line of code is custom

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🔒 Privacy & Trust

✅ What We Do

• Run every calculation in your browser — nothing is uploaded
• Cite a named, peer-reviewed source for every formula
• Publish our source code and revision history openly on GitHub
• Disclose any advertising or affiliate links clearly
• Fix reported bugs within days and document changes publicly
• Reply to every email from a real human (İsmail)

❌ What We Don't Do

• We do not sell, rent, or share your personal data
• We do not require accounts or email addresses
• We do not provide medical diagnosis or treatment
• We do not hide results behind a paywall
• We do not use dark patterns or fake urgency
• We do not publish AI-generated medical claims unchecked

How to Verify

Open your browser's Network tab (F12 → Network) while using any calculator. You'll see zero POST requests carrying your health data. Everything computes locally in JavaScript.

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📝 Health Guides & Resources

In-depth, evidence-based articles paired with interactive calculators:

Guide	Category	Read Time	Link
Weight Loss Timeline Calculator Stack 2025	Weight Management	34 min	Read →
Waist-to-Hip Ratio: Better Predictor Than BMI?	Body Composition	9 min	Read →
BMI and Waist Circumference Combined	BMI & Weight	12 min	Read →
Keto Diet Complete Guide	Diet & Nutrition	22 min	Read →
AI-Powered BMI & Body Fat Calculator	BMI & Weight	16 min	Read →

→ Browse All Health Guides

Additional Resources

Resource	Link
📚 Google Sites Resource Hub	Open →
📄 Entity Documentation	Open →
🗺 HQ & Coverage Map	Open →
❓ FAQ	Open →
📢 Advertise With Us	Open →
🤝 Affiliate Program	Open →

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🎬 Video Explainers

Watch how HealthCalcPro works in under 3 minutes:

Video	Language	Watch
HealthCalcPro — An Explainer	🇬🇧 English	▶ Watch on YouTube
HealthCalcPro — Claridad en Tu Salud	🇪🇸 Español	▶ Watch on YouTube
HealthCalcPro — Clareza Sobre Sua Saúde	🇧🇷 Português	▶ Watch on YouTube

→ Subscribe to HealthCalcPro on YouTube

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👨‍💻 Founder

İsmail Günaydın

Full-Stack Web Engineer · Software Developer · Venture Builder 15+ Years Experience · 100+ Websites Built · 16 Digital Brands

HealthCalcPro is built and maintained by İsmail Günaydın — a full-stack web engineer and digital strategist based in Istanbul, Turkey. İsmail specializes in Next.js, TypeScript, SEO/AEO/GEO, and privacy-first web applications. He is not a licensed clinician, but an engineer who cares obsessively about the accuracy of every formula shipped.

"I'm not a doctor, and I don't pretend to be. What I am is an engineer who cares obsessively about the accuracy of every formula we ship. Each calculator is based on a named, citable source, and every clinical claim is linked to its primary reference. When I'm unsure, I write 'I'm unsure' in plain English instead of making something up."

Platform	Link
🌐 Personal Website	ismailgunaydin.com
🌐 HealthCalcPro Author Profile	healthcalcpro.com/authors/ismail-gunaydin
💼 LinkedIn (Personal)	linkedin.com/in/ismailgunaydin
🌐 ModernWebSEO (Flagship Brand)	modernwebseo.com
🐦 X / Twitter	x.com/ismailgunaydinn
✍️ Medium	medium.com/@ismailgunaydin
📂 GitHub	github.com/ismailGunaydn
🗂 Wikidata (Personal)	Q138653257

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🌐 Brand Network — 16 Digital Brands

HealthCalcPro is part of a network of 16 digital brands built and operated by the same founder:

🧮 Calculator & Utility Platforms

Brand	Description	URL
HealthCalcPro	Free clinician-reviewed health calculators	healthcalcpro.com
Hepsi Hesapla	Finansal, matematiksel ve günlük yaşam hesaplayıcıları (TR)	hepsihesapla.com
Unit Convert Now	Instant unit conversions for length, weight, temperature, currency	unitconvertnow.com
Text Word Count	Free word, character and reading time counter for writers	textwordcount.com
Toolgenx	Productivity utilities and generators for creators and developers	toolgenx.com
Pix n PDF	Convert, compress and edit images and PDF files online	pixnpdf.com
Wheelie Names	Random name picker wheel for classrooms, giveaways and decisions	wheelienames.com

💼 Digital Agency & Professional

Brand	Description	URL
ModernWebSEO	AI-Ready web design, SEO, AEO & GEO strategies	modernwebseo.com
İsmail Günaydın	Founder portfolio — projects, writing and contact	ismailgunaydin.com

🏢 Industry-Specific Sites (Turkey)

Brand	Description	URL
A1 Organizasyon	Düğün, nişan ve özel gün organizasyon hizmetleri	a1organizasyon.com
Işıklı Tabela	Özel tasarım ışıklı tabela üretimi ve kurulum	isiklitabela.net
Tabela TR	Türkiye geneli tabela üretim, tasarım ve montaj	tabelatr.com
Yılbaşı Işık Süsleme	Yılbaşı ve özel gün ışıklı süsleme ve dekorasyon	yilbasiisiksusleme.com

🛍 E-Commerce & Lifestyle

Brand	Description	URL
Luna Intim	Premium iç giyim ve kişisel bakım koleksiyonu	lunaintim.com
Sauna Kabin	Ev ve işletme tipi sauna kabin satışı ve kurulumu	saunakabin.com
Trio Lezzet	Lezzetli tarifler ve yemek kültürü platformu	triolezzet.com

→ View the Full Network

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🔗 Official Channels & Entity Stack

HealthCalcPro Profiles

Platform	URL
🌐 Website	healthcalcpro.com
💼 LinkedIn	linkedin.com/company/healthcalcpro
📘 Facebook	facebook.com/people/Health-Calc-Pro
📺 YouTube	youtube.com/@health-calc-pro
📂 GitHub	github.com/ismailGunaydn/HealthCalcPro
✍️ Medium	Why We Built HealthCalcPro
📊 Crunchbase	crunchbase.com/organization/healthcalcpro
💻 Dev.to	Building a Privacy-First Health Calculator Platform
📝 Hashnode	HealthCalcPro Engineering Health Tools
📬 Substack	HealthCalcPro Newsletter
🚀 Product Hunt	producthunt.com/products/free-bmi-calculator
🗂 Wikidata	Q135988866
📚 Google Sites Hub	Resource Hub
📄 Entity Docs	Google Docs
🗺 Coverage Map	Google Maps

Founder Profiles

Platform	URL
🌐 Personal Website	ismailgunaydin.com
💼 LinkedIn	linkedin.com/in/ismailgunaydin
🌐 ModernWebSEO	modernwebseo.com
🐦 X / Twitter	x.com/ismailgunaydinn
📂 GitHub	github.com/ismailGunaydn
🗂 Wikidata	Q138653257

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🏷 Schema.org Structured Data

The following JSON-LD is implemented on healthcalcpro.com for search engine and AI search visibility:

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  "@type": "Organization",
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  "foundingDate": "2025",
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      "https://www.wikidata.org/wiki/Q138653257",
      "https://www.modernwebseo.com"
    ]
  },
  "sameAs": [
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    "https://open.substack.com/pub/ismailgunaydin/p/healthcalcpro",
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    "https://www.wikidata.org/wiki/Q135988866",
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  "knowsAbout": [
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    "Weight Loss Planning",
    "Pregnancy Tracking",
    "Health Age Assessment",
    "TDEE Calculation",
    "Mifflin-St Jeor Equation"
  ],
  "areaServed": "Global",
  "inLanguage": "en"
}

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📞 Contact

Questions? Bug reports? Partnership inquiries?

📧 Email: ismailgnydn28@gmail.com 🌐 Contact Page: healthcalcpro.com/contact 💼 LinkedIn: linkedin.com/company/healthcalcpro

Bug reports go straight to the top of the queue. We publicly credit reporters if they'd like.

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⚠️ Medical Disclaimer

HealthCalcPro is an educational tool, not a medical device. The information provided is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this platform.

See our full Medical Disclaimer, Privacy Policy, and Terms of Service.

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© 2025–2026 HealthCalcPro · Global HQ: USA

Not a substitute for professional medical advice, diagnosis, or treatment.

Crafted with ❤️ by İsmail Günaydın