Health & Fitness Calculators

Monitor your wellbeing with free health tools. From BMI and body fat to sleep cycles and due dates, based on clinical guidelines and proven formulas.

Check your blood pressure reading against clinical categories from normal to hypertensive crisis.

Calculate your Body Mass Index and see which weight category you fall into.

Estimate your body fat percentage using the US Navy circumference method.

Find your daily calorie needs using the Mifflin-St Jeor equation and your activity level.

Estimate your baby's due date using Naegele's rule with cycle length adjustment.

Calculate your maximum heart rate and five Karvonen training zones for optimal workouts.

Find your healthy weight range using BMI guidelines, Hamwi and Devine formulas.

Get your ideal daily protein, fat and carbohydrate split based on your TDEE and goals.

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Find out how much water you should drink daily based on your weight, activity and climate.