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Water Intake Calculator
Estimate your recommended daily water intake from your body weight plus a bump for exercise, shown in liters, fluid ounces and cups.
Recommended daily water
2.80 L
≈ 95 fl oz · about 12 cups
A general guideline; needs rise in hot climates, pregnancy and illness. ⚕️ Not medical advice.
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
How is my water need estimated?＋
From your body weight and activity level, using common hydration guidelines.
Does food count toward hydration?＋
Yes — you also get water from food and other drinks, so total needs vary. Use this as a rough target.
Is it medical advice?＋
No — needs change with climate, health and exercise; drink to thirst and consult a professional if unsure.