The short answer

For most healthy adult women, a solid daily target is about 2.7 liters of total water. That equals roughly 11.5 cups from all sources. On a typical day, about 9 cups come from beverages and the rest from foods such as fruit, vegetables, yogurt, and soups.

Why “total water” matters

Hydration guidance counts everything you drink, not just plain water. Tea, coffee, milk, and sparkling water all contribute. Moist foods add meaningful amounts too, which is why many people meet the target without drinking 11.5 cups of plain water.

Pregnancy and breastfeeding

Needs are higher during these stages. Aim for about 3.0 liters per day in pregnancy and about 3.8 liters per day while breastfeeding.
If you follow European style guidance, think in terms of fluids only: about 2.0 liters of beverages daily for most women, adding roughly 300 milliliters in pregnancy and about 700 milliliters during lactation. Total water will be higher once food moisture is included.

When you may need more than baseline

Increase intake on days with:

• Hot or very dry weather, saunas, or overheated indoor air
• Exercise or physically demanding work
• Fever, vomiting, or diarrhea
• High altitude or long flights

Practical ways to hit your target

• Simple goal: drink about 9 cups of beverages across the day. Foods will supply the rest to reach about 2.7 liters total.
• Spread it out: one glass after waking, one with each meal, and one during each work block or workout.
• Use body cues: thirst is useful, and pale yellow urine usually signals adequate hydration.

A note on individual differences

Body size, diet, medications, and health conditions change what is right for you. People with kidney, heart, or thyroid issues, or those on diuretics, should follow personalized medical advice.

Bottom line

For a healthy adult woman, about 2.7 liters of total water per day is a reliable target. Adjust upward for pregnancy, breastfeeding, heat, activity, illness, or altitude. If you prefer a simple rule, aim for around 9 cups of beverages daily and let normal meals supply the rest.