How Much Formula Does a 5-Month-Old Need?

Five months is when bottles start to feel like a negotiation. The baby who used to drain a bottle without looking up now stops halfway through to stare at the ceiling fan, the dog, your earring. Meanwhile someone at every family lunch asks whether she has tried avocado yet.

The amount itself barely moves. Most 5-month-olds take about 950 ml (32 oz) of formula a day, the same daily ceiling as at four months.¹ What changes is the split: fewer bottles with more in each, heading toward the AAP's 6-month pattern of 180 to 240 ml at each of 4 or 5 feeds.¹

How much formula does a 5-month-old need per day?

About 950 ml, which is also the most the guideline allows.

The American Academy of Pediatrics says babies should usually drink no more than an average of about 950 ml (32 oz) in 24 hours.¹ Its weight-based rule, roughly 160 ml per kilo per day, overshoots that ceiling once a baby is past about 6 kg (13 lb). Most 5-month-olds are past it, so the ceiling is the number that applies.

A smaller baby still under 6 kg follows the weight rule instead: a 5.5 kg baby works out to about 900 ml. The growth chart shows where your baby sits.

Either way, 950 ml is the most a baby should average, and nobody has to hit it. The AAP expects babies to regulate their own intake from day to day, so a baby who takes a bit less and grows well is fine.¹

How to split 950 ml at 5 months

Pick the number of bottles that fits your baby, then divide.

Bottles per day	Per bottle	Daily total
4	238 ml	950 ml
5	190 ml	950 ml
6	158 ml	950 ml

Four bottles of about 240 ml is already the top of the AAP's range for six months, so plenty of 5-month-olds are not there yet.¹ There is no reason to push it. If bigger bottles keep coming back up as spit-up, five or six smaller ones are just as correct.

Why does my 5-month-old get distracted during bottles?

Partly because the world is suddenly more interesting than milk, and partly because the bottle may simply be finished.

The AAP is direct about this: a baby who becomes fidgety or easily distracted during a feed is probably done.¹ A baby who drains the bottle and keeps smacking their lips might still be hungry. Reading those two signals beats coaxing in the last few sips.

If distraction is cutting feeds short all day, give one or two bottles somewhere dim and quiet, then judge the 24-hour total rather than any single bottle. The AAP calls this responsive feeding: following your baby's hunger and fullness cues instead of the line on the bottle.²

Can a 5-month-old start solids?

The AAP's general timing for solids is about 6 months.³ It also describes readiness in practical terms, and those signs matter more than the date:⁴

• Sits in a high chair or feeding seat with good head control
• Opens their mouth when food comes their way, watches you eat, and reaches for your food
• Moves food from a spoon to the back of the mouth instead of letting it dribble out onto the chin
• Has roughly doubled their birth weight and weighs about 6 kg (13 lb) or more

The AAP notes that a baby who shows these signs may be ready, so a 5-month-old who checks every box is worth discussing with your pediatrician.⁴ A baby who stares at your fork but still slumps in the seat is just curious.

Solids do not change the formula number this month either. Even once they start, the AAP says babies still get most of their nutrition from formula, breast milk, or both at first.⁴

Does a 5-month-old still need night feeds?

Not always, though many still take one.

The AAP notes that between 2 and 4 months, or once a baby weighs more than about 5.4 kg (12 lb), most formula-fed babies no longer need a middle-of-the-night feed, because they take more during the day.¹

Needing a feed and waking for one are different things. Plenty of 5-month-olds still wake for one or two bottles a night. If you are thinking about dropping one, the night weaning guide walks through how that usually goes, and your pediatrician can tell you whether weight gain makes it a good time. Our 5-month sleep schedule covers what nights tend to look like at this age.

Is my 5-month-old getting enough?

Wet diapers and a steady growth curve tell you more than any single bottle.

The AAP looks for at least 5 to 6 wet diapers a day after the first few days, and says babies who stay in a healthy range on the growth chart are probably getting a healthy amount.³ Our wet diapers by day guide covers the first signal, and the growth chart plots the second.

Frequently asked questions

My 5-month-old drinks less than 950 ml. Is that a problem?

Usually not. 950 ml is an upper limit, and the AAP expects intake to vary from day to day. If your baby consistently seems to want much less (or much more) than the guideline, the AAP suggests raising it with your pediatrician, who will look at weight and diapers rather than the bottle alone.¹

My baby finishes a 240 ml bottle and still roots. Is that real hunger?

Sometimes. Lip smacking after an empty bottle can mean hunger, but the AAP also notes that some babies have a stronger need to suck and may just want a pacifier after the feed.¹ If your baby regularly goes over 950 ml a day, talk to your pediatrician before adding bottles.

Can I give my 5-month-old water?

The AAP says healthy babies do not need extra water, because formula provides all the fluid they need. Once solids begin, a little water in a cup is fine, up to about 240 ml (8 oz) a day, and the AAP notes a small amount may be needed in very hot weather.⁴

Should I put cereal in the bottle to make it more filling?

No. The AAP advises against cereal in a bottle because your baby could choke, and because it can lead to eating more than they need and gaining too much weight. The one exception is reflux, and only when your pediatrician recommends it.⁴

For the whole first year, the formula amounts by age chart runs from newborn to the switch to cow's milk at 12 months. The 4-month guide explains why the ceiling took over in the first place. Next month is when the AAP expects solids to join the bottle: see how much formula a 6-month-old needs. Our feeding guide shows how bottles and solids overlap.