How Much Milk Does an 8-Month-Old Need?

How Much Milk Does an 8-Month-Old Need?

The standard starting point used by the American Academy of Pediatrics (AAP) and the CDC is 150 ml of milk per kilogram of body weight per day — written as 150 ml/kg/day. Most 8-month-olds weigh between 8 and 10 kg (roughly 17.5–22 lbs), which puts the weight-based daily milk target at approximately 1200–1500 ml per day (about 41–51 oz).

This rule applies equally to infant formula and to expressed breast milk. The caloric density of standard formula (about 67 kcal per 100 ml) closely matches mature breast milk (roughly 65–70 kcal per 100 ml), so the same volume target covers daily fluid and energy needs for both milk types.

An important nuance at eight months: as solid food intake grows into meaningful portions across breakfast, lunch, and dinner, actual daily milk consumption often falls below the full weight-based calculation. The CDC notes that by 8–10 months many babies settle at 600–900 ml of milk per day alongside growing solid meals — a healthy reduction that happens over weeks and months, not overnight. The 150 ml/kg/day figure remains a useful upper reference ceiling, but do not be alarmed if your baby is taking noticeably less while thriving on solids.

The figure is a starting estimate, not a strict daily quota. A baby growing steadily along a consistent growth curve and producing at least 5–6 wet diapers per day is almost certainly feeding adequately — regardless of whether the ml figure precisely matches the calculation.

How Much Formula for an 8-Month-Old?

Formula-fed 8-month-olds typically take 180–240 ml (6–8 oz) per feed across 3–4 feeds in 24 hours, alongside solid meals. The exact per-feed amount depends on your baby's weight, how many milk feeds they take, and how much solid food they are eating.

As solid food portions grow, it is natural and expected for formula intake to trend gradually lower. This reduction should always be baby-led: if your baby consistently drains every bottle and shows hunger cues, maintain the per-feed amount. If they regularly leave formula behind after a solid meal, do not push them to finish. Responsive feeding protects against both underfeeding and overfeeding.

How Much Breast Milk for an 8-Month-Old?

The 150 ml/kg/day calculation applies to expressed (pumped) breast milk in the same way it applies to formula. For a 9 kg baby, that is a calculated target of 1350 ml per day — though in practice many breastfed babies this age take somewhat less while growing well.

Research on exclusively breastfed babies shows that total daily breast-milk intake often plateaus near 750–800 ml per day by six to eight weeks and remains roughly stable regardless of further weight gain. A breastfed 9 kg baby consuming around 700–900 ml per day alongside solid meals is almost certainly meeting their needs — the weight-based figure can overstate requirements for directly breastfed babies at this age.

If you are nursing directly at the breast, total volume is not measured at each feed. Rely on indirect markers of adequate intake: at least 5–6 wet diapers per day, regular stools, and steady weight tracking. The WHO and AAP both recommend continuing to breastfeed alongside solid foods through at least 12 months — and longer if both mother and baby wish to continue.

8-Month-Old Feeding Amount Lookup Table

The table below uses the 150 ml/kg/day rule across common weights for 8-month-olds. Find your baby's approximate weight, then use the column matching your daily milk feed count as a per-feed starting point. Remember that with growing solid meals, actual daily intake may sit below the full calculated total.

For an instant calculation with your baby's exact weight and feed count, open the Baby Milk Calculator.

If your baby's weight falls between two rows, divide your exact daily total (weight in kg × 150) by your daily milk feed count. For example, a 9.2 kg baby: 9.2 × 150 = 1380 ml daily; across 4 feeds that is 1380 ÷ 4 = 345 ml (~11.7 oz) per feed.

How Often Should an 8-Month-Old Eat?

At eight months, most babies take milk 3–4 times per 24 hours, roughly every 3–4 hours during the day, alongside 2–3 solid food sittings. The majority of 8-month-olds have dropped the overnight milk feed entirely, consolidating sleep into one long stretch — though individual patterns vary widely.

A typical 8-month feeding day might look like: morning milk feed followed by breakfast solids, midday milk feed, lunch solids, an optional afternoon milk feed, dinner solids, and an evening milk feed before bed. Some babies consolidate to just three milk feeds comfortably; others still prefer four. The structure matters less than ensuring milk is offered before or at separate times from solid sittings — particularly as solid portions grow — so milk intake is not crowded out by solids when the baby is hungriest.

Formula-fed babies often go slightly longer between milk feeds than breastfed babies because formula empties from the stomach more slowly. Follow hunger and fullness cues — early hunger cues include rooting, hand-to-mouth movements, and increased alertness. Crying is a late hunger cue.

How Expanding Solids Affect Milk Intake at 8 Months

Eight months marks a turning point in the balance between milk and solid food. Two principles from the AAP and WHO are especially important at this stage:

• Milk stays primary through 12 months. Even as solid food portions grow meaningfully — breakfast, lunch, and dinner are becoming established — breast milk or formula remains the primary source of calories, fat, protein, iron, and vitamins through the first birthday. Solid foods complement milk; they do not replace it yet.
• A gradual reduction in milk volume is normal and expected. The CDC notes that by 8–10 months many babies are taking 600–900 ml of milk per day alongside growing solid meals. If your 8-month-old is eating well at solid sittings and taking slightly less milk per day than the calculation suggests, that is healthy appetite self-regulation — not a feeding problem.

Offering milk before solid food sittings (or at clearly separate times) in the early months of solids helps protect overall milk intake and, for breastfeeding parents, supports continued milk supply. If you are navigating the texture and variety transition, the When to Start Solid Foods guide covers readiness signs, first foods, and how milk and solids work together across the first year.

The 8–9 Month Growth Spurt

A well-recognized growth spurt often occurs around 8–9 months. This period frequently coincides with major motor milestones: many babies begin crawling, pulling to stand, and cruising along furniture. Increased physical activity raises energy expenditure and can temporarily drive higher milk demand.

Growth spurts are temporary — most last 2–5 days. During the spurt, feeding more frequently or offering a few extra milliliters per bottle is reasonable and will not create a long-term habit. For breastfeeding parents, cluster feeding during a spurt signals the breast to increase supply to match demand — follow the baby's lead.

Teething is also common and often intensifies around 8–9 months as more teeth emerge. If your baby is pulling off the breast or bottle, drooling heavily, or showing gum discomfort, teething may be temporarily disrupting feeding comfort rather than indicating a lasting change in milk needs.

Signs Your 8-Month-Old Is Getting Enough Milk

The AAP and CDC both emphasize that observable signs of adequate intake are more meaningful than matching a calculated volume. At eight months, look for:

• Wet diapers: At least 5–6 wet diapers per day remains the most reliable hydration marker. Note that stool patterns change significantly once solid foods are established — wet diaper count is the more useful independent indicator at this age.
• Steady weight gain: Most 8-month-olds gain roughly 85–100 g (about 3–3.5 oz) per week — a gradually slowing rate compared with earlier months. Tracking consistently along any growth percentile is more meaningful than reaching a specific weight on any given day.
• Settles between feeds: A well-fed baby typically relaxes after a feed and has calm or alert periods before the next hunger cue.
• Alert and engaged: Strong interest in surroundings, social interaction, babbling, and purposeful reaching all signal a well-nourished baby.
• Active motor development: Sitting independently, crawling or beginning to pull to stand, banging objects together, and transferring items between hands are all positive indicators of adequate energy and growth.

If diaper counts are persistently low, weight gain has stalled, or the baby seems persistently unsettled after every feed, speak with your pediatrician before making independent feeding changes. A baby who regularly leaves milk in the bottle and shows clear fullness cues after a solid meal should not be encouraged to finish — responsive feeding protects against overfeeding.

The Bottom Line

Most 8-month-olds have a weight-based daily milk target of 1200–1500 ml (41–51 oz), calculated as 150 ml × body weight in kg. Dividing that total by 3–4 milk feeds gives a per-feed starting point of roughly 300–450 ml (10–15 oz), depending on weight and feed count.

With solid meals now established, actual intake often tracks below the full calculation — many thriving 8-month-olds take 600–900 ml per day alongside breakfast, lunch, and dinner. That is healthy and expected. Let your baby's appetite guide the balance: offer milk at regular intervals, do not restrict it to push solids, and trust fullness cues when they leave a bottle unfinished. Wet diapers, a steady weight curve, and a baby who is curious and active are the real evidence that the amount is right.

For an instant weight-based calculation in ml or oz, open the Baby Milk Calculator or the focused formula calculator.