Our health calculators help you track and understand the key metrics that matter for your wellness journey. Each tool uses clinically validated formulas — the same equations used by doctors, nutritionists, and fitness professionals — to give you reliable results you can act on. From understanding your body composition to planning your nutrition and tracking pregnancy milestones, these calculators put professional-grade health insights at your fingertips.

Body composition is the foundation of any health plan. Our BMI calculator uses the standard WHO formula to classify your weight relative to height, while the body fat calculator provides a more nuanced view using the US Navy circumference method. For nutrition, the BMR calculator (using the Mifflin-St Jeor equation) estimates your resting metabolic rate, and the TDEE calculator factors in your activity level to determine total daily calorie needs. The macro calculator then breaks this into protein, carbohydrate, and fat targets based on your specific goals — whether that's muscle gain, fat loss, or maintenance.

For family planning and pregnancy, we offer a comprehensive suite of tools. The ovulation calculator predicts your most fertile days based on cycle length, while the specialized version for irregular cycles uses pattern analysis across multiple months. During pregnancy, our due date calculator, trimester tracker, weight gain calculator, and kick counter help you monitor milestones week by week. The baby growth percentile calculator uses official WHO growth charts to track your infant's development against population norms.

Fitness enthusiasts will find our heart rate zone calculator invaluable for optimizing cardio training, while the 1RM calculator helps strength athletes plan progressive overload. All tools run privately in your browser — no health data is stored or transmitted. Free, accurate, and accessible from any device.