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Health & Fitness Calculators - 28+ Free Health Tools

Monitor your health and fitness with accurate, free tools. From BMI and calorie calculators to pregnancy and period trackers - everything you need for a healthier lifestyle.

28+ Health Tools Arabic / English 100% Private

⚖️ Body & Weight Calculators

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BMI Calculator
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Body Fat Calculator
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Ideal Weight Calculator

🥗 Nutrition & Diet Calculators

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Calorie Calculator
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TDEE Calculator
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BMR Calculator
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Macros Calculator
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Protein Calculator
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Caffeine Calculator
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Vitamin D Calculator

💧 Hydration Calculators

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Water Intake Calculator
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Daily Water Intake Calculator
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Hydration Calculator

❤️ Heart & Blood Calculators

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Heart Rate Calculator
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Blood Pressure Tracker
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Blood Type Compatibility
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Blood Sugar Converter
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Hemophilia Treatment Calculator

🏃 Sleep & Fitness Calculators

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Sleep Cycle Calculator
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Pace Calculator
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Running Pace Calculator
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Steps to Distance Calculator

🤰 Pregnancy & Women's Health

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Pregnancy Calculator
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Due Date Calculator
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Fertility Calendar
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Ovulation Calculator
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Period Tracker
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Baby Growth Tracker

Reliable Health Tools for a Better Life

Hijri Calendars offers a comprehensive suite of health and fitness calculators designed to help you understand your body better and make informed health decisions. All our calculators are based on internationally recognized medical formulas such as the Harris-Benedict equation for Basal Metabolic Rate and the Mifflin-St Jeor equation for calorie calculations.

Whether you are looking to lose weight, build muscle, or monitor your general health, you will find the right tools here. The BMI calculator gives you a quick assessment of your weight status, the calorie calculator determines your daily needs precisely, and the macros calculator helps you distribute protein, carbohydrates, and fats optimally.

For mothers and expecting parents, we provide specialized calculators for tracking pregnancy, determining expected due dates, and monitoring baby growth, along with a fertility calendar and period tracker. All data stays on your device and is never shared - your privacy is our priority.

Frequently Asked Questions about Health Calculators

Body Mass Index (BMI) is a measure that uses height and weight to assess whether a person's weight is healthy. It is calculated by dividing weight in kilograms by the square of height in meters. Results: below 18.5 (underweight), 18.5-24.9 (normal weight), 25-29.9 (overweight), 30 and above (obese).

The calorie calculator determines your daily needs with recommendations for weight loss or gain. The TDEE (Total Daily Energy Expenditure) calculator more precisely computes the total calories your body burns daily based on your Basal Metabolic Rate and physical activity level.

Water needs vary from person to person based on weight, activity level, climate, and health status. The general rule is 30-35 ml per kilogram of body weight. Use our water intake calculator to get a personalized recommendation based on your personal data, especially important in Saudi Arabia's hot climate.

The pregnancy calculator uses the medically approved Naegele's rule to estimate the due date by adding 280 days (40 weeks) from the first day of the last menstrual period. The result is an estimate, and it is always recommended to consult an OB-GYN to confirm the date with an ultrasound examination.

Yes, your privacy is our top priority. All calculations are performed directly in your browser (client-side) and no health data is sent to our servers. We do not collect, store, or share any personal health information. You can use all tools with complete confidence.