How Many Ounces Of Water Should You Drink While Pregnant?

Pregnant women should drink 64 to 96 ounces (8 to 12 cups) of water daily, based on ACOG.

You have probably heard that staying hydrated matters more than ever during pregnancy. Friends, family, and prenatal apps all tell you to drink up — but rarely give you a clear number. The vague advice “just listen to your body” does not help when your bladder feels full every twenty minutes.

The honest answer comes down to a specific range backed by the American College of Obstetricians and Gynecologists. Most pregnant women need 64 to 96 ounces of water per day — roughly 8 to 12 standard cups. That target is higher than the typical 8-glass goal for non-pregnant adults, and for good reason.

The Standard Recommendation For Pregnancy Hydration

ACOG’s guidance is straightforward: aim for 8 to 12 cups (64 to 96 ounces) of water every day. This amount supports the increased blood volume, amniotic fluid formation, and daily nutrient transport that come with pregnancy.

A 2024 study in PMC set the total water requirement at 3.0 liters per day — about 2.3 liters (roughly 80 ounces) as beverages and the rest from food. The numbers align closely with ACOG’s range, giving you a consistent target to shoot for.

Some providers suggest an extra 8 to 16 ounces above the standard range, especially if you are active or in a warm climate. But 64 to 96 ounces remains the most widely cited starting point.

Why Hydration Needs Increase During Pregnancy

Your body goes through major shifts that drive up water requirements. Understanding these changes can help you stay motivated when you are tired of refilling your bottle.

• Blood volume expansion: Your blood volume increases by roughly 50% during pregnancy. Water helps maintain that volume and keeps circulation steady for you and your baby.
• Amniotic fluid production: Water is the main ingredient in amniotic fluid, which cushions the baby and allows room for movement. Forming and maintaining that fluid takes a steady water supply.
• Digestive support: Hormonal changes can slow digestion, but adequate water helps prevent constipation — a common pregnancy complaint.
• Nutrient delivery: Water carries oxygen and nutrients through the placenta to the baby. Even mild dehydration can reduce that delivery efficiency.
• Temperature regulation: Pregnancy raises your metabolic rate, making you more prone to overheating. Water helps regulate body temperature through sweat and evaporation.

Each of these functions competes for the same water supply. That is why the 64- to 96-ounce target exists — to keep all those processes running without drawing down your own fluid reserves.

How Many Ounces Pregnant Women Actually Need

The 64 to 96 ounce range covers the vast majority of pregnancies. But individual needs vary based on body weight, activity level, climate, and trimester. A good way to gauge sufficiency is to check your urine color — pale yellow generally indicates proper hydration.

For a more precise number, you can use this approach: divide your weight in pounds by two, and aim for that many ounces of water per day (this is the common “half your body weight” rule). For example, a 150-pound woman would target about 75 ounces — right in the middle of ACOG’s range. To see the full official guidance, refer to the ACOG water intake recommendation.

These recommendations are generally consistent despite regional differences. The core message is that most pregnant women need noticeably more water than non-pregnant adults — roughly in the 64 to 96 ounce ballpark.

Simple Ways To Hit Your Daily Water Goal

Reaching 64 to 96 ounces every day can feel like a chore if you are not used to it. Small adjustments to your routine can make the target much more manageable.

1. Start your morning with a full glass: Drinking 8 to 12 ounces right after waking up gets a head start on your total. It also helps replace fluid lost overnight.
2. Carry a reusable bottle with ounce markings: Knowing how much your bottle holds (e.g., 20 oz or 32 oz) lets you track progress without counting glasses.
3. Set a timer or phone reminder: A gentle buzz every hour reminds you to take a few sips, especially if you get caught up in work or other duties.
4. Add fruit or herbs for flavor: Lemon, cucumber, or mint can make plain water more appealing without added sugar. This helps if plain water feels boring.
5. Eat water-rich foods: Melons, cucumbers, oranges, and soups count toward total fluid intake. They complement your drinking water goal, not replace it.

Signs You Might Be Dehydrated

Even with a plan, it is possible to fall short on some days. Recognizing the early signals of dehydration helps you correct course before it affects your energy or health.

One of the simplest checks is urine color. Dark yellow or amber urine suggests you need more fluid. Additional signs include persistent thirst, a dry mouth, or feeling lightheaded when you stand up quickly. In more noticeable cases, you may experience a rapid heartbeat or unquenchable thirst. If these signs appear, increase your water intake gradually over the next few hours.

A practical way to spot-check your hydration status is the urine color method. Per the What to Expect urine check, aiming for pale yellow (like lemonade) rather than dark yellow is a reliable daily gauge.

The Bottom Line

Pregnancy increases your water needs substantially — aiming for 64 to 96 ounces daily is the standard target supported by both ACOG and recent research. Staying in that range helps maintain amniotic fluid, blood volume, and overall energy. Checking urine color and adjusting as needed can help you stay on track even on busy days.

Your obstetrician or midwife can help you fine-tune that target based on your specific health history, activity level, and any conditions like gestational diabetes or kidney concerns — so if the numbers feel overwhelming, bring your water log to your next prenatal visit.