How to tell if your baby is getting enough milk

Newborn · Feeding · Reviewed 20 June 2026 · All articles

One of the most common worries in those early days and weeks is whether your baby is drinking enough. It is not always easy to tell, especially when you are breastfeeding and cannot see exactly how much milk your baby has taken. The reassuring news is that several reliable, practical signs can tell you a great deal about how well feeding is going, without any specialist equipment. This guide walks through each of them so you can feel confident rather than anxious.

Nappy output: the single most useful indicator

Nappy output, both the number of wet nappies and the character of dirty nappies, is widely regarded by midwives, health visitors, and the NHS as the most reliable day-to-day sign that a baby is getting enough milk.

Here is what to expect in the first week:

A pale yellow or almost colourless wet nappy (rather than dark yellow or orange) is the sign you want to see. Dark or orange urine, or fewer wet nappies than expected for the day of life, can be a sign that your baby needs more fluids. If you are not sure whether a disposable nappy is wet, place a piece of tissue inside: even a little urine will dampen it.

Dirty nappies matter too. Most newborns, especially breastfed ones, will have several dirty nappies a day in the first few weeks. After about four to six weeks, some breastfed babies go several days without a dirty nappy. This is usually normal provided the baby is gaining weight and producing plenty of wet nappies, but always check with your health visitor if you are not sure.

Weight gain: the gold-standard check

Regular weight checks are the clearest objective measure of whether a baby is getting enough milk over time. The NHS and the WHO Child Growth Standards are used in the UK to track whether a baby is following their expected growth curve.

Some weight loss after birth is completely normal. Most babies lose 5 to 7% of their birth weight in the first three to five days. The NHS considers up to 10% weight loss acceptable, though a baby who has lost more than 10% needs close monitoring and support. The key milestone is that babies should return to their birth weight by 10 to 14 days old.

After regaining birth weight, typical weekly gains are:

These are averages. What matters most is that your baby follows a consistent trajectory on their growth chart, not that they hit a specific number each week. A single lower-gain week is rarely cause for concern; a sustained plateau or drop across centile lines warrants a conversation with your health visitor or GP.

Your baby will be weighed at the newborn examination, then at around 5 days and 10 to 14 days. After that, routine checks happen at 6 to 8 weeks and at developmental reviews. You can also ask to have your baby weighed at any point at a children's centre or with your health visitor.

Feeding frequency and duration

Newborns have tiny stomachs and breast milk digests quickly, so frequent feeding is completely normal. The NHS recommends feeding on demand, which typically means 8 to 12 feeds in 24 hours in the early weeks. Formula takes a little longer to digest, so formula-fed babies may go slightly longer between feeds, but still expect roughly 8 feeds per day to start.

There is no single correct length for a breastfeed. Some babies feed for 10 minutes and are satisfied; others take 40 minutes. What matters is whether the baby seems satisfied and is growing well. Very short feeds (under 5 minutes) in the early weeks can sometimes mean the baby is not transferring enough milk, while excessively long feeds (over an hour at every sitting) combined with poor weight gain may suggest a latch or supply issue worth investigating.

For formula-fed babies, the volume is easier to track. A general guide from the NHS is approximately 150 to 200 ml per kilogram of body weight per day, split across feeds. A 4 kg baby would need roughly 600 to 800 ml over 24 hours. Your midwife or health visitor can give you personalised guidance.

Contentment after feeds

A well-fed baby will usually settle and appear relaxed after a feed. They may fall asleep or simply look peaceful and alert. While babies vary enormously in temperament, a baby who comes off the breast or bottle and seems calm and satisfied is a reassuring sign.

It is important to distinguish between a baby who is contentedly sleepy after a feed and one who is drowsy because they are not getting enough. Newborns who are underfed can sometimes become lethargic and sleep for unusually long stretches without waking to feed. If your baby is sleeping more than 4 to 5 hours between feeds in the first few weeks and not gaining weight well, wake them gently to offer a feed and discuss it with your midwife.

Constant crying and feeding that never seems to settle a baby is sometimes a sign that a baby is not getting enough milk, but it can also indicate wind, colic, or overtiredness. Context and a combination of signs, particularly nappy output and weight checks, give a much clearer picture than behaviour alone.

Signs of a good breastfeeding latch

For breastfed babies, how the baby latches on significantly affects how much milk they can transfer. A poor latch can mean that even a baby who feeds frequently does not get as much milk as they need. The signs of a good latch include:

Persistent nipple pain, cracked or misshapen nipples after a feed, or a baby who makes clicking sounds while feeding can all point to a latch issue. A breastfeeding specialist, your midwife, or a lactation consultant (IBCLC) can observe a feed and help you make adjustments. Getting latch support early can make an enormous difference to milk supply and to how much milk your baby receives at each feed.

When to seek help

Most feeding concerns can be addressed with support and reassurance, but some signs indicate that you should speak to a professional promptly rather than waiting:

Your midwife is available for the first 10 to 28 days after birth. After that, your health visitor is your first point of contact for feeding concerns. The National Breastfeeding Helpline (0300 100 0212) and La Leche League Great Britain also offer free support. Many hospitals and children's centres run breastfeeding support groups where you can get hands-on help.

Asking for help is not a sign of failure. Feeding a newborn is a skill that takes time for both parent and baby to learn. The earlier you get support when something does not feel right, the more quickly it can usually be resolved.

Frequently asked questions

How many wet nappies should a newborn have per day?

On day one, one or two wet nappies is normal. By day four to five, expect at least six wet nappies in 24 hours. A consistently wet nappy count of six or more from around day five onward is one of the strongest signs that a baby is getting enough milk.

How much weight is it normal for a newborn to lose after birth?

Most newborns lose up to 7% of their birth weight in the first few days. A loss of up to 10% is considered within the normal range by the NHS, though it warrants close monitoring. Babies should be back to their birth weight by around 10 to 14 days old, then continue to gain steadily.

How do I know if my baby has a good latch?

Signs of a good latch include: the baby's mouth is wide open with lips flanged outward, the chin touches the breast, you can see more areola above the top lip than below, feeding does not hurt after the first few seconds, and you can hear the baby swallowing. Nipple pain throughout a feed usually means the latch needs adjusting.

When should I seek help if I am worried about my baby's feeding?

Seek help promptly if your baby has not regained birth weight by two weeks, if they lose more than 10% of their birth weight, if there are fewer than six wet nappies a day from day five onward, if the baby seems consistently unsettled after feeds, or if you are experiencing significant pain when breastfeeding. Contact your midwife, health visitor, or GP.

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