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    Free Health Calculators & Tools | Medimadad Health Tools Hub

    Medically Written & Reviewed
    By Dr. Ajit Kumar, MD (Medicine) — Founder, Medimadad. About the Author | Editorial Policy

    Free, evidence-based health calculators built on internationally recognized formulas and guidelines — no sign-up required, no ads blocking your results. Each tool is designed to give you a clear, honest number along with the context to actually understand what it means.

    BMI Calculator → Check whether your weight falls within a WHO-defined healthy range for your height, in seconds. Daily Calorie & BMR Calculator → Find your Basal Metabolic Rate and daily calorie needs using the Mifflin-St Jeor equation — the current gold-standard formula for healthy adults. Ideal Body Weight Calculator → See the clinical reference weight for your height and sex using the Devine formula, the standard used for medical dosing calculations. Protein Requirement Calculator → Find how much protein you need per day based on your weight and goal, from general health to muscle building. Daily Water Intake Calculator → Find your daily fluid needs based on your weight and activity level, using a weight-based estimate rather than the generic 8-glasses rule. Daily Magnesium Intake Calculator → Find your recommended daily magnesium intake based on age, sex, and pregnancy/breastfeeding status. Waist-to-Height Ratio Calculator → Check your waist-to-height ratio, a screening measure some research links more closely to cardiometabolic risk than BMI alone. Body Fat Percentage Calculator → Estimate your body fat percentage from simple tape-measure circumferences, accurate to within about 3-4% of a DEXA scan for most people. Creatine Dosage Calculator → Find your personalized creatine loading dose by body weight, plus the standard maintenance dose backed by research. Daily Fiber Intake Calculator → Find your recommended daily fiber intake based on standard Dietary Reference Intake values for your age and sex. Omega-3 Intake Calculator → Find your recommended daily omega-3 intake, covering both plant-based ALA and fish-based EPA/DHA.
    More free health calculators are added regularly — check back soon.

    Why Use Medimadad’s Health Tools

    Every calculator on this page uses the same standard, internationally recognized formulas that healthcare professionals reference — the WHO’s BMI thresholds, the Mifflin-St Jeor equation recommended by the Academy of Nutrition and Dietetics, and similar established methods for tools added going forward. We explain the limitations of each tool clearly, because a number without context isn’t actually useful.

    More Tools Coming Soon

    We’re actively expanding this hub with additional calculators for ideal body weight, daily water intake, protein requirements, and more. If there’s a specific health calculation you’d find useful, our AI health assistant Tuly (the chat icon in the corner) can help answer general questions in the meantime.

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