Explore our Health & Medical calculators for fast, reliable guidance. Estimate BMI, BMR, TDEE, body-fat %, ideal weight, and hydration needs. Compute heart-rate zones, VO2 max estimates, and calorie burn. Convert A1C to eAG, assess cholesterol ratios, and interpret blood pressure categories. Plan pregnancy timelines: due date, trimester weeks, and ovulation windows. Calculate medication doses, pediatric weight-based dosing, IV drip rates, creatinine clearance, eGFR, and adjusted body weight. Track fever thresholds, growth percentiles, and apnea risk scores. Every tool shows formulas, units, and step-by-step. Educational only-not medical advice. Always consult a clinician for diagnosis, treatment, and prescriptions.