Pink Mom MathPregnancy Water Intake Calculator
Find your personalised daily hydration target based on body weight and trimester.
How Pregnancy Water Needs Are Calculated
This calculator uses a weight-based formula to estimate daily water needs:
- Base: body weight (kg) × 30 ml — standard hydration guideline
- Pregnancy addition: +300 ml to support increased blood volume and fluid distribution
- Second/third trimester: +200 ml additional for amniotic fluid maintenance
The result is displayed in both millilitres (ml) and fluid ounces (oz), and converted to the number of standard 250 ml glasses for easy tracking.
These are targets for total fluid — water, herbal tea, milk, and fluid from food all count. Plain water is the most efficient source.
Frequently Asked Questions
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This calculator provides estimates for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider with questions about your health or your baby's health.
Formula: body weight × 30 ml + 300 ml pregnancy addition + 200 ml in T2/T3. Based on general hydration principles. Individual needs vary.