Back to Health & Fitness Calculators
Daily Water Intake Calculator
Estimate your body's optimal hydration needs by factoring in your weight, exercise rate, and climate settings.
Educational estimate only — not medical advice. This is a general guideline, not a target to force down. Drinking much more water than your kidneys can handle — especially quickly — can dilute your blood sodium to dangerous levels (hyponatraemia), which is life-threatening. Let thirst be your main guide, spread fluids through the day, and check with a doctor if you have kidney, heart or liver conditions or are on fluid-restricting medication.