4 Month Old Baby: Milestones, Sleep & Feeding Guide

Rolls, giggles, and grabbing everything in reach — your 4 month old is getting delightfully hands-on. This guide pulls together what to expect this month across sleep, feeding, and development, plus a realistic sample schedule, a milestone checklist, and a few play ideas worth trying.

Your baby at 4 months at a glance

• Development: first purposeful rolls, steady head control, and grabby hands that reach for everything.
• Sleep: around 14-15 hours a day, often disrupted for a stretch by the well-known four-month sleep shift.
• Feeding: still all milk — solids are not quite on the table yet, even as curiosity about your dinner grows.
• Fun fact: the laughter you’re hearing this month is often the first real, hearty giggle, not just a smile.

Sleep at 4 months

Most 4 month olds sleep about 14-15 hours across 24 hours, split between 10-11 hours at night (often with fewer night feeds than before) and 3.5-4.5 hours of daytime sleep across 3 naps that are slowly consolidating into a routine. Wake windows — the stretch of awake time your baby can handle before the next sleep — typically run 1.5 to 2.5 hours at this age.

Sleep measure	Typical range
Total sleep	14-15 hours/24h
Night sleep	10-11 hours
Day sleep (naps)	3.5-4.5 hours
Naps	3, consolidating
Wake windows	1.5-2.5 hours

Sample 4 month old schedule

Time	What’s happening
6:45 AM	Wake and feed
8:45 AM	Morning nap
10:15 AM	Wake and feed
12:15 PM	Midday nap
1:45 PM	Wake and feed
3:45 PM	Afternoon nap
4:45 PM	Wake and feed
6:30 PM	Bedtime routine and feed
7:00 PM	Bedtime
2:00 AM	Night feed
5:00 AM	Possible early feed or resettle

Your baby’s actual times will look a little different, and that’s fine — treat this as a shape rather than a script.

Around now, many families meet the famous four-month sleep progression, when maturing sleep cycles can bring more frequent night waking for a stretch. It’s a normal developmental shift, not a step backward, and consistency helps you ride it out. Keep every sleep on the back in a bare crib, and consider moving bedtime a touch earlier if overtiredness creeps in. For the full deep dive on riding out this stretch, see our guide to the 4 month sleep regression, and for the nap-by-nap detail behind the numbers above, read the full 4 month sleep schedule guide. For how wake windows shift across the whole first year, see wake windows by age.

Feeding at 4 months

Milk is still the complete diet, and most babies aren’t quite ready for solids yet. You may notice more efficient feeds and growing curiosity about the food on your plate. Hold off on solids until your baby shows clear readiness signs, usually closer to six months.

• Continue breast milk or formula as the sole source of nutrition for now.
• Watch for early readiness signs building, like good head control and interest in your food, but don’t rush solids.
• Feeds may temporarily increase during a growth spurt around this age.
• If you have questions about when to start solids, your pediatrician can help you read your baby’s individual cues.

Development milestones at 4 months

Gross motor

• May roll from tummy to back — often the first big rolling milestone, and a genuine workout for those growing neck and core muscles.
• Typically holds head steady, without support, when upright — a sign that neck strength has caught up with curiosity.
• Might push up onto elbows or hands during tummy time — building the strength that will eventually lead to sitting.
• May push down on their legs when feet are on a firm surface — an early rehearsal for standing, months from now.

Fine motor

• May reach for and grab a toy with an open hand — a big leap from the reflexive grasping of earlier months.
• Typically brings hands and toys to the mouth to explore — mouthing is how babies gather information at this age.
• Might hold a toy when you place it in their hand and shake it — an early taste of cause and effect.
• May bat at dangling objects with more accuracy — hand-eye coordination is visibly sharpening.

Language & social

• May coo, gurgle, and make sounds back when you talk — the beginnings of turn-taking conversation.
• Typically laughs and smiles to get your attention — often the first real, hearty laugh shows up this month.
• Might turn to look toward the source of a voice — hearing and attention are working together well.
• May show you they are happy or upset with clear expressions — an early, honest form of communication.

Milestone checklist: 4 to 5 months

Every baby develops at their own pace, so think of this as a general guide to what most babies are working on, not a pass-or-fail test.

• Rolls from tummy to back
• Holds head steady without support when upright
• Reaches for and grabs toys
• Brings hands and objects to the mouth
• Pushes up on forearms or hands during tummy time
• Laughs and makes cooing sounds in response to you
• Turns toward voices and sounds
• Uses expressions to show happy and upset feelings
• Enjoys playing with people and may cry when play stops
• Watches faces closely and follows moving objects

When to check in with your pediatrician

• Does not hold head steady when upright
• Does not push down on legs when feet touch a firm surface
• Does not watch things as they move or does not smile at people
• Does not coo or make sounds back
• Does not bring hands or objects to the mouth
• Any loss of skills, or anything that worries you, check with your pediatrician

Most babies hit these milestones on slightly different timelines, and a small delay in one area rarely means anything serious — but your pediatrician is always the right person to ask if something feels off.

Play ideas for this month

Roll-along encouragement. Practicing rolling builds core strength and body awareness, and celebrates a big new motor skill. Place a favorite toy just out of reach to one side during tummy time and gently encourage your baby to turn toward it.

Grab-and-explore basket. Offering safe objects of different textures develops grasp, hand-to-mouth exploration, and curiosity. Gather a few clean, baby-safe items of varied textures and let your baby reach, hold, and mouth them under your watch.

Sing-and-sway. Songs with repetition and rhythm support language, listening, and joyful connection. Hold your baby and sing simple songs with gentle movements, pausing so they can respond with coos and smiles.

The takeaway

Four months is a big one: rolling, grabbing, real laughter, and a sleep system that’s busy maturing (sometimes noisily). If nights get bumpier for a while, that’s the well-known sleep shift at work, not a sign you’re doing anything wrong. Stay consistent with routines, keep sleep safe, and let your baby’s own pace — not the calendar — lead the way on solids and everything else.