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Evidence-Based Clinical CalculatorsHealthGhuru Interactive Suite

HealthTools

Simple tools to help you understand and manage your health.

Explore 9 free, scientifically-grounded calculators covering body composition, metabolic expenditure, cardiovascular training zones, circadian sleep architecture, and gestational timelines.

Showing 9 of 9 Clinical CalculatorsSubscriber-Only Feature • Plans from ₹129

WHO Clinical Standard

Body Composition

BMI Calculator

Calculate your Body Mass Index using your height and weight.

Key Metrics Covered:Instant Formula

Underweight <18.5Normal 18.5–24.9Overweight 25+

Calculate BMI

Mifflin-St Jeor Formula

Metabolism

BMR Calculator

Estimate your Basal Metabolic Rate using the Mifflin-St Jeor equation.

Key Metrics Covered:Instant Formula

Resting Calories60–75% Daily BurnBaseline Rate

Calculate BMR

TDEE Multiplier

Energy Balance

Calorie Calculator

Calculate your estimated daily calorie needs based on physical activity.

Key Metrics Covered:Instant Formula

Maintenance-500 kcal Deficit+500 kcal Surplus

Calculate Calories

Hydration Guidelines

Hydration & Renal

Water Intake Calculator

Estimate your daily fluid and hydration needs based on weight and activity.

Key Metrics Covered:Instant Formula

35 ml / kg Weight+350 ml ExerciseLiters & Glasses

Body Mass + Sweat Rate Calibration

Calculate Water Intake

Multi-Formula Range

Body Composition

Ideal Weight Calculator

Find your healthy weight range based on height and clinical formulas.

Key Metrics Covered:Instant Formula

Devine (1974)Robinson (1983)BMI 18.5–24.9 Corridor

Calculate Ideal Weight

Cardio Training Zones

Cardiovascular

Heart Rate Calculator

Calculate your target heart rate training zones and aerobic thresholds.

Key Metrics Covered:Instant Formula

Zones 1 to 5Tanaka FormulaKarvonen Heart Reserve

5 Targeted Zones (50% – 100% VO2 Max)

Calculate Heart Rate

Circadian Architecture

Neurology & Sleep

Sleep Calculator

Calculate optimal bedtimes and wake times based on 90-minute sleep cycles.

Key Metrics Covered:Instant Formula

90-Min REM Cycles14-Min Sleep LatencySleep Now Alarm

REM / NREM Sleep Architecture

Calculate Sleep Cycles

Naegele's 280-Day Rule

Maternal Health

Pregnancy Due Date Calculator

Estimate your due date, current gestational age, and pregnancy trimesters.

Key Metrics Covered:Instant Formula

Weeks & Days AgeTrimesters 1–3Ultrasound Milestones

Calculate Due Date

Macronutrient Split

Clinical Nutrition

Nutrition Calculator

Estimate your daily macronutrient breakdown (protein, carbs, and fats).

Key Metrics Covered:Instant Formula

Protein (4 kcal/g)Carbs (4 kcal/g)Fats (9 kcal/g)

Calculate Macros

Subscriber Exclusive Wellness Suite

Unlock All 9 Clinical Health Tools & Master Your Daily Body Routine

When you subscribe to HealthGhuru, all 9 clinical calculators are permanently unlocked. Plus, gain instant access to our Daily Body Routine Manager — synchronizing your morning hydration, calorie & macronutrient fuel, cardio heart rate zones, and circadian sleep architecture.

9 Clinical Calculators

Daily Body Routine

Sleep Alarms & Zones

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Educational & Informational Health Notice

HealthGuru health tools provide general educational estimates based on established clinical and physiological formulas (such as Mifflin-St Jeor, Naegele's rule, and WHO BMI categories). They do not provide medical diagnoses, treatment plans, or personalized prescriptions. Always consult a qualified physician or registered dietitian for individualized health evaluations.