Water Intake Calculator
Estimate daily water intake from body weight and a per-kg hydration rule.
Note: A health reference only. Exercise, weather, pregnancy, illness, and medical advice can change your actual hydration needs.
Category: Life Tools
When to use?
Use it to set a daily water target and convert it into an approximate number of cups.
How to use
- Enter body weight.
- Check the recommended mL range.
- Review the cup estimate.
Input Explanation
Enter body weight in kg. The tool estimates around 30–35 mL per kg.
Calculation Basis
Daily water = body weight × about 30–35 mL, with a cup estimate based on 200 mL.
Usage Examples
- Daily hydration target - Set a practical water goal from body weight.
- Cup conversion - Translate mL into an easy cup count.
- Routine tracking - Use the estimate as a hydration habit reference.
Examples
- 70 kg → about 2,100–2,450 mL
- 50 kg → about 1,500–1,750 mL
Cautions
- This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.
Guides
Body-weight estimate
A common rough guideline is about 30–35 mL of water per kg of body weight per day.
When needs change
Exercise, hot weather, pregnancy, illness, medication, and medical advice can increase or decrease fluid needs.
FAQ
Is the same amount right for everyone?
No, activity, heat, and health conditions change needs.
Do coffee and tea count?
They add fluid, but plain water is still the clearest hydration target.
Does food water count?
Food contributes water, so actual drinking needs may be slightly lower.
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