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A water intake calculator estimates your daily hydration needs based on body weight and activity level. The general guideline is 35ml per kg of body weight, adjusted upward for exercise and heat.
Công thức
liters_per_day = body_weight_kg × 0.033; or fl_oz = weight_lbs / 2
- kg
- Body weight (kg) — Current body weight in kilogrammes
- L
- Water per day (L) — Recommended daily water intake
- lbs
- Body weight (lbs) — Current body weight in pounds
Hướng dẫn từng bước
- 1Base intake = body weight (kg) × 35 ml
- 2Sedentary adjustment: ×1.0, Moderate: ×1.15, Active: ×1.35
- 3Add 500ml per 30 minutes of intense exercise
- 4~20% of daily water comes from food
Ví dụ có lời giải
đầu vào
70kg person, moderate activity
Kết quả
~2.8 litres/day (11.2 glasses)
đầu vào
90kg active athlete
Kết quả
~4.25 litres/day
đầu vào
55kg sedentary person
Kết quả
~1.9 litres/day
Câu hỏi thường gặp
How much water should I drink daily?
General rule: 33 ml per kg of body weight. For 70 kg person: 2.3 L (roughly 8–10 cups). Varies by activity, climate, health.
Is there a simple rule?
Yes: drink half your body weight in ounces. 150 lbs → 75 fl oz/day (~2.2 L). Add more for exercise, hot climates.
Can I drink too much water?
Rare but possible (hyponatremia). Normal intake is safe. Listen to thirst, increase intake during exercise/heat.
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