Health Calculators
Five free calculators for everyday health questions: your body mass index, how many calories you need a day, your body fat percentage, a pregnancy due date, and a tip for the table. Every calculator runs in your browser and nothing you enter is uploaded or stored.
These tools give general information only. They are not a diagnosis, and they do not replace a doctor, dietitian or other qualified health professional — especially the pregnancy and calorie calculators, where your personal situation matters more than any formula. If you have a medical condition, are pregnant, or are planning a big change to diet or exercise, talk to a professional first.
BMI Calculator
Body mass index from height and weight, with healthy-range categories.
Calculate →Calorie Calculator
Daily calorie needs from BMR (Mifflin-St Jeor) and your activity level.
Calculate →Body Fat Calculator
Body fat percentage by the US Navy method, from simple tape measurements.
Calculate →Pregnancy Due Date Calculator
Estimated due date, current week and trimester from your last period.
Calculate →Tip Calculator
Tip, total and per-person share — split the bill in seconds.
Calculate →Browse Other Categories
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