Daily Water Intake and Water Loss
This tool calculates an adult’s daily water requirement and water evaporation.
| Daily Water Intake | mL/day (※１) |
| Water Loss | mL/day |
- Formulas
- Required water intake = Body weight (kg) × 40
- Water lost through evaporation = Body weight (kg) × 15 + 200 × (Body temperature − 36.8)
- (※1) Adults are said to need approximately 2.5 liters of water per day.
- From food: 1 liter
- Water produced in the body: 0.3 liters
- From drinks: 1.2 liters
- Please note that children need a greater water intake than adults.
- Reference: Mizu no Kenkogaku (The Health Science of Water), Koichiro Fujita, Shincho Sensho
※This site assumes no responsibility for calculation results or other information. We do not provide individual consultations.
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