Average Amount of Breast Milk Pumped Per Day: What’s Normal by Baby’s Age

It is easy to feel anxious when you look at your pumping bottle and wonder whether the amount is “enough”. Many mums compare numbers, but your output is not always a perfect measure of your milk supply.

The average amount of breast milk pumped per day can give you a helpful starting point, but your baby’s nappies, weight gain, feeding pattern, and overall wellbeing matter too. This guide explains typical ranges by baby’s age, why output varies, and practical ways to support comfortable pumping.

Quick Answer: How Much Breast Milk Pumped Is Normal Per Day?

There is no single perfect amount that every parent should pump each day. A helpful benchmark depends on whether you are exclusively pumping or combining pumping with direct breastfeeding.

For exclusively expressing parents, La Leche League GB notes that babies between one and six months often need around 750-1,035 ml of breast milk per day. That is roughly 25-35 fl oz, although some healthy babies need less or more.

As a broad guide:

• First few days: only small amounts of colostrum are normal.
• First 2 weeks: Around 600–750+ ml per day; output usually rises gradually as mature milk comes in.
• 1 to 6 months: many exclusively pumping parents express around 750-1,035 ml per day.
• 6 months and beyond: Often around 600–900 ml; output varies as solid foods are introduced, but breast milk remains an important part of your baby’s diet.

If you breastfeed directly and pump as an extra session, your pumped amount may be much lower because your baby has already removed milk.

Average Pumping Output by Baby’s Age

The average breast milk pumped per day changes most quickly in the first few weeks after birth. In the early days, you may only express small amounts of colostrum. As mature milk comes in, daily output usually rises. Once supply is established, many exclusively pumping mums produce a more consistent daily amount, although every baby and pumping routine is different.

These figures are only a guide. They are most useful if you are exclusively pumping. If you are breastfeeding as well as pumping, your pumped amount per session may be much lower, especially after a feed. That does not automatically mean your milk supply is low.

Newborn: First 24 Hours

In the first 24 hours after birth, it is normal to express only tiny amounts of colostrum. Some mums may collect just a few drops at a time, while others may collect a little more. Across the first day, the total amount may be only around 30 ml / 1 oz, and that can still be enough because colostrum is concentrated and your newborn’s stomach is very small.

Days 2–5: Milk Starting to Increase

Between days 2 and 5, your milk usually begins to increase as colostrum transitions towards mature milk. Pumped amounts can still vary a lot, but you may see output rise from small amounts to around 300–400 ml / 10–13 oz per day by day 5. Per session, this might look like 5–30 ml at first, then gradually more as your milk comes in.

End of Week 1

By the end of the first week, some mums may be pumping around 300–600 ml / 10–20 oz per day, though there is still a wide normal range. A single pumping session might produce around 30–75 ml / 1–2.5 oz, depending on how recently your baby fed, whether you are double pumping, and how often you express.

Around 2 Weeks

Around the two-week mark, expressed milk volume becomes a useful sign of how supply is building, especially for mums who are exclusively expressing or whose babies cannot feed directly. Some neonatal and lactation guidance uses 500–750 ml per day by day 14 as an important supply-building range, particularly when supporting babies in hospital or NICU settings.

For many mums, this may work out to around 45–90 ml / 1.5–3 oz per session if pumping about 8 times per day. Some will produce more per session, while others may need more frequent pumping to reach a similar daily total.

1 to 6 Months

By around one month onwards, your output often becomes more predictable as your supply becomes established. So, how much breast milk can you pump a day at this stage? Many exclusively pumping mums produce around 750–1,035 ml / 25–35 oz per day.

If you pump 6–8 times per day, this may work out to around 90–150 ml / 3–5 oz per session. However, some mums pump larger amounts less often, while others pump smaller amounts more frequently. Both can be normal if your baby is growing well, has enough wet nappies, and seems settled after most feeds.

6 Months and Beyond

From around 6 months, many babies begin solid foods, but breast milk remains an important part of their diet. Pumped output may gradually reduce as solids increase, but the change is not the same for every baby.

Some mums may still express around 600–900 ml / 20–30 oz per day, while others pump less depending on how often their baby breastfeeds, takes bottles, or eats solid food.

Key Factors That Affect How Much Breast Milk You Pump

How much breast milk you get when pumping can vary a lot, even between mums with healthy milk supplies.

Your output is not only affected by how much milk your body makes, but also by when you pump, how your baby feeds, how often milk is removed, and how comfortable your pump setup feels. These factors can help you understand your numbers more clearly.

Exclusive Pumping vs Pumping Alongside Breastfeeding

Your pumping output will look very different depending on whether you are exclusively pumping or breastfeeding as well.

If you are exclusively pumping, your pump replaces your baby at the breast, so your daily pumped amount needs to cover most or all of your baby’s milk intake. Once supply is established, many exclusively pumping mums produce around 750–1,035 ml / 25–35 oz per day, often split across 6–8 pumping sessions.

That may work out to around 90–150 ml / 3–5 oz per session, although some mums pump more or less depending on their storage capacity and schedule.

If you are breastfeeding and pumping, your pumped amount per session is usually lower because your baby may already have removed milk. Pumping 15–60 ml / 0.5–2 oz after a feed can be completely normal, especially if you are only building a small fridge supply or preparing for an occasional bottle.

Time of Day

Many mums notice they pump more in the morning and less later in the day. This is often because milk has built up overnight and prolactin levels are usually higher during the night and early morning. For example, you may pump 120–180 ml / 4–6 oz in your first morning session but only 60–90 ml / 2–3 oz in an afternoon or evening session.

This day-to-day pattern is normal. Rather than judging your supply by one session, look at your total output across 24 hours.

Time Since the Last Feed or Pump

The gap since your last feed or pumping session can also change how much you express. If you pump shortly after breastfeeding, you may only collect a small amount. If it has been 3–4 hours since the last milk removal, you may collect more.

Breast Storage Capacity

Breast storage capacity means how much milk your breasts can comfortably hold between feeds or pumping sessions. It is different from breast size. Some mums naturally store more milk and can pump larger amounts less often, while others produce smaller amounts per session but need to pump more frequently.

Pump Quality, Flange Fit, and Settings

Your pump setup can make a big difference to how much milk you express. A flange that is too small may rub or pinch the nipple, while one that is too large may pull in too much areola and reduce suction efficiency. Either issue can lead to discomfort and lower output.

Suction should feel strong but comfortable, not painful. A lower comfortable setting often works better than the highest setting. If your output suddenly drops, or pumping starts to hurt, checking your flange size and settings is a good first step.

Stress, Tiredness, and Let-Down

Stress, pain, rushing, or exhaustion can make your let-down slower, even if your milk supply has not changed. This can make it look as if you are producing less milk during a session.

How Do You Know Your Baby Is Getting Enough Milk?

The average amount of breast milk pumped per day can be a useful benchmark, but it should not be the only way you judge feeding. The NHS guidance on whether your baby is getting enough milk focuses on feeding behaviour, nappies, and weight gain rather than pump output alone.

• Your baby gains weight steadily after the first few days. It is normal for newborns to lose some weight at first, but they should then begin gaining again.
• Your baby has enough wet nappies. From day 5 onwards, at least 6 heavy wet nappies in 24 hours is usually reassuring.
• You can hear or see swallowing during feeds, with long, rhythmic sucks and pauses after milk lets down.
• Your baby seems calm, relaxed, or satisfied after many feeds, although cluster feeding and growth spurts are normal.
• Your baby looks healthy and alert when awake.

How to Support Your Pumping Output

If your output seems lower than expected, start with small, practical changes rather than assuming you are failing. Milk production responds to regular removal, but comfort, fit, rest, and support also matter.

Pump More Often When Needed

Breast milk works on supply and demand. If you are exclusively pumping and need to increase output, adding an extra session or reducing long gaps may help. This is especially important in the early weeks, when your supply is still being established.

Use Hands-On Pumping and Gentle Massage

Gently massaging your breasts before and during pumping can support let-down and help milk move. Breast compressions during expression may help some parents remove more milk, especially if flow slows before the breast feels soft. Stop if massage causes pain.

Check Your Flange Size and Settings

A poor flange fit can make pumping uncomfortable and less effective. If your nipple rubs, pinches, turns white, or is pulled too far into the tunnel, check your size. Use the lowest suction that removes milk well. Higher suction is not always better and should not hurt.

Optimise Timing and Environment

Many mums pump more in the morning, so placing one regular session early in the day can help. A calm space, warmth, a drink nearby, photos of your baby, or a short relaxation routine may make let-down easier.

Try Power Pumping Carefully

Power pumping mimics cluster feeding by using repeated short pumping periods with rests in between. Some parents try 20 minutes pumping, 10 minutes resting, 10 minutes pumping, 10 minutes resting, then 10 minutes pumping.

It may help some people over several days, but it is not essential for everyone. If you have oversupply, blocked ducts, nipple pain, or mastitis symptoms, ask for professional advice first.

Keep a Realistic Routine

A routine you can repeat is often better than an ambitious plan that leaves you exhausted. Prepare clean pump parts in advance, keep spare storage bags or bottles ready, and note your total daily output instead of judging each session separately.

Recommended eufy Breast Pumps for Comfortable Daily Pumping

A steady pumping routine is not just about ounces or timing. Comfort, fit, and how easily pumping fits into your day often matter just as much as the numbers.

For mums looking to make pumping feel more manageable, eufy’s wearable breast pumps offer hands-free convenience with heating, app control, and portable charging support for use at home, at work, or on the go.

eufy Breast Pump S2 Pro

The eufy Breast Pump S2 Pro is a strong choice for mums who pump often and want a wearable pump that feels more supportive during regular sessions. Instead of being tied to one place, you can wear it inside your bra while getting ready in the morning, working at a desk, looking after your baby, or fitting in a session between feeds.

What makes it especially useful for consistent pumping is the way comfort features are built into the routine. The S2 Pro combines HeatFlow 2.0 warming with VibraPump vibration massage, offering 7 heating levels and 4 massage modes to help make let-down feel more relaxed.

It also gives you 300 mmHg suction, 10 suction levels, and app-based rhythm control, so you can adjust each session based on how your milk flow feels that day. The see-through design helps with nipple alignment, while the portable charging case supports up to 7 days of use, which is helpful if you pump several times a day or need a reliable option away from home.

Best for: Mums who pump regularly and want a more comfort-focused wearable pump with warming, massage, app control, and a portable charging case.

Key features:

• Comfort-led pumping: HeatFlow 2.0 warming and VibraPump massage are designed to support comfort and let-down during regular pumping sessions.
• Easier alignment: See-through cups and included sizing inserts help you check fit before and during pumping.
• Smart pumping support: Full-milk alerts and leak alerts are useful when you are pumping while working, tidying, or caring for your baby.
• Portable routine: Charging case supports up to 7 days of use, making it easier to keep up with sessions away from home.
• Fit and seal support: Double-sealed flange design helps create a more secure feel during wearable pumping.
• Daily maintenance: Detachable parts and cleaning accessories help make regular use easier to manage.

eufy Breast Pump S1 Pro

If the S2 Pro is the more advanced comfort-focused option, the eufy Breast Pump S1 Pro is eufy’s well-loved classic for everyday wearable pumping.

It uses HeatFlow warming with 7 adjustable heat settings, helping each session feel gentler and more relaxed. You also get up to 300 mmHg of safe, hospital-grade suction, 7 suction levels, and app control through OptiRhythm, so you can adjust the pump around your body, milk flow, and daily schedule.

MadeForMums rated it 4.9/5, with the reviewer noting, “I forgot I was wearing it,” after expressing 7 oz in one session.

Best for: Mums who want a trusted heated wearable pump for everyday expressing, work breaks, travel, and building a steady pumping routine.

Key features:

• Classic heated wearable design: Built-in HeatFlow warming supports a more comfortable everyday pumping routine.
• Good fit support: Includes 17/19/21 mm sizing inserts and a nipple measurement card to help you start with a better flange fit.
• Quiet daily use: Under-46 dB operation helps when pumping during work breaks, naps, or travel.
• Portable charging case: Up to 5 days of use makes it practical for regular pumping away from home.
• Safe materials: All skin-contact components are made from BPA-free, food-grade materials.

When to Seek Professional Help

While the average amount of breast milk pumped per day varies, some situations deserve support. Speak to a midwife, health visitor, GP, IBCLC, or breastfeeding counsellor if:

• Your baby is not gaining weight well.
• Your baby has fewer wet nappies than expected.
• You have ongoing nipple, breast, or pumping pain.
• Your milk output drops suddenly without an obvious reason.
• You have a painful red area on the breast, flu-like symptoms, or a fever.
• You feel overwhelmed, anxious, or unsure how to continue.

Conclusion

The average amount of breast milk pumped per day is only a guide, not a test you have to pass. Your baby’s age, feeding pattern, pump fit, time of day, and routine can all affect output. Focus on regular milk removal, comfort, your baby’s nappies and weight gain, and early support if something feels wrong. With the right information and a comfortable pumping setup, expressing milk can feel more manageable day by day.

FAQs

What is an average amount of breast milk to pump in a day?

For many exclusively pumping parents with an established supply, a typical daily amount is around 750-1,035 ml, or roughly 25-35 fl oz. Some babies need less or more. If you breastfeed directly as well as pumping, you may express much less because your baby has already removed milk.

What is considered a full milk supply?

A full milk supply means you are producing enough milk for your baby’s needs. For exclusively pumping parents, that often falls near the 750-1,035 ml daily range once supply is established. The best signs are steady weight gain, enough wet nappies, effective feeding, and a baby who seems healthy and alert.

Is it normal to pump different amounts at different times of day?

Yes. Many mums pump more in the morning and less later in the day. Output can also change with stress, sleep, hydration, how recently your baby fed, and how well your pump fits. Look at your overall pattern rather than one low session.

Can hormones affect pumped milk output?

Hormonal changes can affect milk production for some parents, but low output is often linked to more common factors such as infrequent milk removal, poor latch, stress, illness, or an incorrect flange size. If you suspect hormones, contraception, or a health condition is affecting supply, speak with a GP, midwife, or lactation specialist.