⚠️ Educational Tools Only. Not Medical Advice.   •   🔒 100% Privacy-First. No Cloud Storage.   •   ✅ WHO & Mifflin-St Jeor Standards.   •   💸 Always Free.
Fitness AI Health Calculators Platform FitnessAI
✨ Precision Health Intelligence

Free Health Calculators &
Your Potential, Quantified.

Democratizing health metrics. Access premium, privacy-first tools for body composition, sleep optimization, and performance. No sign-ups.

🔒 No Data Stored
Instant Analysis
📚 Evidence Based
💸 100% Free
🛡️ Privacy First
🔒 No Data Stored
Instant Analysis
📚 Evidence Based
⚖️

Body Composition

Establish your baseline metrics with clinical precision.

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Daily Wellness

Optimize your biological rhythms for recovery.

Performance Lab

Data-driven tools to maximize athletic output.

The Science of Self-Quantification

In a digital era flooded with conflicting health advice, Fitness AI stands as a beacon of clarity. We offer a suite of tools that are fast, private, and incredibly accurate. Our mission is to democratize "Bio-Data"—giving you the precise numbers you need to understand your own biology.

🔒 The Local-First Privacy Advantage

Unlike most apps, our tools like the BMI Scanner and Macro Calculator run entirely on your device using Client-Side JavaScript. No personal health data is sent to our servers. This ensures absolute privacy while using our Visual Workout Planner.

Our Holistic Approach: The Silo Structure

Health isn't just one number; it's a connected system. We have organized our tools into three logical "Silos" to help you address every aspect of your well-being:

Evidence-Based Algorithms (E-E-A-T)

We do not use guesswork. All our calculators rely on peer-reviewed formulas such as the Mifflin-St Jeor Equation for metabolic rate and the Karvonen Formula for heart rate training. This commitment to scientific accuracy ensures that Fitness AI provides clinical-grade data for free.

Frequently Asked Questions

Is my health data stored on your servers?
No. Fitness AI operates on a 'Local-First' architecture. All calculations for BMI, Macros, and Sleep happen directly in your browser. No personal data is transmitted to or stored on our servers.
How accurate are the health calculators?
We strictly adhere to clinical standards. Our BMI tool uses WHO classifications, and our Macro Calculator utilizes the Mifflin-St Jeor equation, which is widely regarded as the most accurate formula for estimating calorie needs.
Is Fitness AI free to use?
Yes, all tools including the Visual Workout Planner and Cardio Pulse Tracker are 100% free to use with no hidden subscriptions or sign-up walls.