The Water Intake Calculator estimates how much water you should drink each day from your body weight, daily exercise and climate. It shows the recommended amount in liters, cups and fluid ounces.
How much water do you need?
Daily water needs scale with body weight, and rise with exercise and hot weather. This calculator starts from a per-kilogram baseline and adds extra for activity and a hot or humid climate.
The result is shown in liters, 250 ml cups and fluid ounces so you can track it however you prefer.
Remember
- Needs vary with health and pregnancy
- Food contributes water too
- Use it as a daily guideline, not a strict rule
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