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⚕️MEDICAL & YMYL DISCLAIMERReviewed August 2026
Educational Purpose Only: The calculations, formulas, and estimates provided by this calorie & nutrition calculator are intended solely for educational, research, and informational purposes. They do not constitute medical advice, diagnosis, or personalized treatment plans.
Always consult a qualified healthcare professional, physician, or registered dietitian before making changes to your diet, exercise regimen, calorie intake, or pregnancy care plan. Never disregard or delay professional medical advice because of something you read on this website.
SCIENTIFIC FORMULA & METHODOLOGY
Clinical Hydration Baseline Formula
Baseline Intake = Weight (kg) × 35 mL (or Weight in lbs ÷ 2 in oz)
Exercise Add-on: +350-500 mL per 30 minutes of vigorous workout
Standard physiological guidelines recommend approximately 30-35 mL of water per kilogram of body weight, plus additional fluids for sweat loss during training.
Clinical Limitations & Considerations
Individuals with kidney conditions or heart failure should follow personalized fluid restrictions prescribed by their physician.
Scientific References & Literature
Sawka, M. N., et al. (2007). "American College of Sports Medicine position stand. Exercise and fluid replacement." Medicine & Science in Sports & Exercise, 39(2), 377-390.
Frequently Asked Questions
How many glasses of water should I drink per day?
While "8 glasses a day" (64 oz / ~2 L) is a common rule of thumb, most active adults require 2.5 to 3.7 liters (85–125 oz) from all fluids and food.