Track your body, diet and sleep: BMI, calories, TDEE, body fat, water intake and more. Free health calculators that work for everyone.
Body Mass Index with healthy-range category.
Basal metabolic rate — calories your body burns at rest.
Daily calorie needs for weight goals.
Total daily energy expenditure with cutting/bulking targets.
US Navy method estimate with visual gauge.
Healthy weight range from 4 medical formulas.
Daily water target based on weight and activity.
Best bedtimes and wake times by sleep cycles.
Pace, speed and race-time predictions.
Due date from last period with week-by-week info.
Fertile window and ovulation day predictor.
Next periods, fertile days and ovulation calendar.
Yes — all health tools here are 100% free, no signup needed.
These are estimates for general guidance only, not medical advice. Consult a doctor for health decisions.
Yes. All calculations happen in your browser — nothing is uploaded or stored.