The Roller: your baby at 4.5 to 5.5 months
The first time your baby moves themselves across a room, it will probably surprise you both.
Between 4.5 and 5.5 months, many babies roll, often tummy to back first and back to tummy a little later. Sleep usually totals 12 to 16 hours across 3 to 4 naps. Once rolling starts, swaddling should stop, and babies are still placed on their back to sleep. Rolling often arrives suddenly, so raised surfaces need close supervision.
Rolling rarely arrives on schedule. Some babies flip once at 4 months and then not again for weeks, others go from still to rolling both ways within days, and a few largely skip it and head for sitting instead. Whichever way it goes, it changes the risk map of your home, because a baby who can roll can leave the surface you put them on.
The Roller at a glance
Typical ranges for 4.5 to 5.5 months. Every baby moves at their own pace.
| What | Typical range |
|---|---|
| Age range | 4.5 to 5.5 months |
| Typical sleep | 12 to 16 hours in 24, naps included |
| Wake windows | About 1.75 to 2.5 hours, guides vary |
| Naps per day | 3 to 4 |
| Rolling | Tummy to back often first, around 5 months for many |
| Milk feeds | 5 to 6 a day, or 4 to 6 oz (120 to 180 ml) per bottle |
| Solid foods | Usually around 6 months, not yet for most |
| Swaddling | Stop at the first sign of rolling |
What may be happening
Body
- The AAP notes most babies roll from tummy to back before managing back to tummy, often around 5 months, although plenty do it the other way round.
- Rolling in both directions is commonly in place by around 7 months, so a baby still working on the first roll at 5 months is well inside range.
- Many babies push up onto straight arms during tummy time and can pivot in a circle on their stomach.
- When held upright, many babies take weight through their legs and bounce, and some begin leaning forward on their hands when propped in sitting.
Brain
- Objects begin to be studied rather than only grabbed, with turning, banging and mouthing all applied to the same toy.
- Many babies begin to look towards a dropped object instead of treating it as gone, an early step towards object permanence.
- Babble often gains more consonant sound, moving from open vowels towards repeated syllables.
- Familiar routines start to be anticipated, so a bath running or a bib appearing may get a reaction before anything else happens.
Connection
- Many babies clearly distinguish familiar people from strangers now, although full stranger wariness usually comes later.
- Squeals, shrieks and raspberries are often used socially, to start an exchange rather than to complain.
- Many babies reach towards a caregiver's face, hair and glasses, which is affection and experiment at the same time.
- Frustration becomes more visible, because wanting a toy that is out of reach is a genuinely new kind of problem.
Sleep at 4.5 to 5.5 months
Total sleep at this age is usually 12 to 16 hours in 24, with around 3 to 4 hours of it spread across 3 to 4 naps. Rolling often disrupts sleep for a few weeks, because many babies practise the new skill in the middle of the night and then get stuck or annoyed. Babies should still be placed on their back, and once they can roll both ways on their own it is fine to leave them where they land.
| Sleep | Typical range |
|---|---|
| Total sleep in 24 hours | 12 to 16 hours |
| Daytime sleep | About 3 to 4 hours |
| Naps per day | 3 to 4 |
| Longest night stretch | 5 to 9 hours for some, shorter for many |
| Wake windows | About 1.75 to 2.5 hours |
Feeding
Most babies at 4.5 to 5.5 months are still entirely on breast milk or formula. The AAP and the NHS both point to around 6 months for first solids, so this month is usually about watching for readiness rather than acting on it. Formula fed babies commonly take 4 to 6 ounces (120 to 180 ml) per feed, moving towards 6 to 8 ounces by 6 months. Interest in your plate is curiosity, not a green light.
- The NHS looks for three readiness signs together: staying in a sitting position with a steady head, coordinating eyes, hands and mouth, and swallowing food rather than spitting it back out.
- Watching you eat, waking more at night and chewing fists are not reliable readiness signs on their own.
- Breast milk or formula stays the main source of nutrition well past the start of solids.
- Iron stores built up before birth begin to run down towards 6 months, which is part of why iron rich first foods are recommended.
Questions parents ask
When do babies roll over?
Many babies roll from tummy to back first, often around 5 months, then back to tummy some weeks later. The AAP notes plenty of babies do it in the opposite order, and rolling both ways is usually in place by around 7 months. If a baby is not rolling at all by 6 months, it is worth mentioning at the next check.
My baby rolls onto their tummy in their sleep. Is that safe?
If your baby rolled there on their own and can already roll both ways unaided, the AAP says they can be left in that position. Keep placing them on their back at the start of every sleep, stop swaddling completely, and keep the sleep space clear of pillows, bumpers, loose blankets and soft toys.
Why has my baby's sleep got worse at 5 months?
New motor skills often disturb sleep. Many babies practise rolling in the middle of the night, wake themselves and then need help resettling. Teething, which can begin any time from 4 to 7 months, may add to it. Total sleep across the day usually stays within 12 to 16 hours even when the nights feel much worse than before.
Can I start solids at 5 months?
The AAP advises breast milk alone for about the first 6 months, and the NHS advises around 6 months. Some babies show readiness a little earlier, and readiness is about skills rather than age: steady head control, sitting with support, and swallowing rather than spitting food out. If you are considering starting before 6 months, check with your pediatrician first.
Is my baby behind if they are not rolling yet?
Not necessarily. Rolling has one of the widest normal ranges of any early milestone, and some babies largely skip it and head for sitting instead. What matters more is whether your baby pushes up in tummy time, moves both sides of the body evenly and keeps gaining new skills over time. Raise any loss of skills with your doctor.
More questions about 4.5 to 5.5 months
The things parents actually search for at this stage. Tap any question to open it.
Why does my baby roll onto their tummy at night and then cry?
Many babies roll before they can comfortably get back, so they arrive somewhere new and object to it. It usually resolves within a few weeks as the return roll is mastered, and plenty of daytime floor practice tends to speed it up. Keep placing your baby on their back to start every sleep, and keep the crib empty apart from a fitted sheet.
Should I stop using a sleep sack now that my baby rolls?
A sleeveless sleep sack is generally still fine, and it replaces loose blankets safely. What must stop is swaddling, because arms wrapped in means a baby who rolls onto their front cannot push up. The AAP advises stopping swaddling at the first sign of rolling attempts. Choose a sack sized correctly so it cannot ride up over the face.
Is it normal for a 5 month old to wake up screaming?
Sudden loud waking is fairly common at this age and usually has an ordinary cause: a new motor skill being practised in sleep, teething discomfort, being stuck mid roll, trapped wind or overtiredness. Night terrors are not typical this young. Regular inconsolable screaming, waking with a fever, or waking that seems painful is worth discussing with your doctor.
Why is my 5 month old suddenly hungrier?
Increased appetite around now often reflects growth and the extra energy used by rolling and pushing up. Milk intake commonly rises before solids begin, and some babies also feed more at night while sleep is unsettled. It is not automatically a sign to start solids. Poor weight gain, or constant feeding that never satisfies, needs a doctor.
Can I give my 5 month old a taste of what I am eating?
Guidance points to around 6 months for first foods, so most 5 month olds are not ready yet. Tastes from an adult plate also risk salt, sugar, honey and choking hazards. If your baby is showing all the readiness signs early, discuss starting with your pediatrician or health visitor rather than beginning with food from your plate.
How many naps should a 5 month old take?
Most 5 month olds take 3 to 4 naps a day, usually adding up to around 3 to 4 hours of daytime sleep inside a 12 to 16 hour total. Nap lengths are often uneven, with one longer nap and several short ones. The move down to two naps typically happens later, often somewhere between 6 and 9 months.
Should my 5 month old be sitting up by now?
Not necessarily. Many babies at 5 months can sit propped forward on their hands in a tripod for a few seconds, and steady unsupported sitting usually arrives between 6 and 8 months. Getting into sitting alone often comes closer to 9 months. Practise on the floor with cushions nearby rather than propped on a sofa or bed.
Why does my baby refuse tummy time now they can roll?
Rolling straight over is very common once it is possible, and it is a sign the skill is working rather than a refusal. Tummy time can continue in other forms: across your lap, on your chest, or with a toy just out of reach to encourage pivoting. Short, frequent sessions usually work better than trying to hold one long one.
Is it normal for a 5 month old to still wake for two night feeds?
Yes, it is common. Nemours notes many babies are physically capable of longer stretches by 6 months, but plenty still wake to feed, especially breastfed babies. Night feeding at 5 months sits within normal range. If night waking is increasing sharply, or daytime feeding has dropped away, it is worth raising at your next appointment.
Why does my baby have a bald patch on the back of their head?
A bald patch at the back is common in the first months and usually comes from friction while lying on the back, plus the normal shedding of newborn hair. It typically fills in once a baby spends more time upright and rolling. Patchy hair loss alongside scaly, red or itchy skin is worth showing to a doctor.
Can teething cause a fever at 5 months?
Teething may cause a slightly raised temperature, but it does not cause a true fever. A temperature of 100.4°F (38°C) or above should be treated as possible illness and checked, not attributed to teeth. Teething typically brings drooling, gum rubbing and irritability. Any fever in a baby under 6 months should be discussed with a doctor promptly.
Why does my baby blow raspberries constantly?
Raspberries are a normal and useful stage of sound play, usually appearing around 4 to 6 months. Your baby is learning to control lips, tongue and breath, which are the same mechanics needed for consonants later. Repeating the sound back turns it into a conversation. It often arrives alongside squealing and the first repeated syllables.
Is it normal for my 5 month old to startle at loud noises?
Yes. A startle response to sudden noise is expected and is a reassuring sign of hearing. Some babies stay more sensitive to noise than others, which is temperament rather than a problem. Worth checking is the opposite: a baby who does not react to loud sounds, does not turn towards voices, or is not babbling by 7 months.
How do I make the floor safe for a baby who can roll?
Once a baby rolls, they can leave any surface, so never leave them alone on a bed, sofa or changing table. On the floor, clear small objects that fit through a toilet roll tube, secure cords and blind pulls, cover hard edges near play areas and block stairs. A rug or mat gives a softer landing than bare boards.
When to check in with your doctor
Willo is a parenting companion, not a medical app. If something feels off, ask.
- Your baby is not rolling at all by 6 months and is not pushing up on their arms during tummy time.
- One side of your baby's body moves noticeably less than the other, or they always roll to the same side.
- Your baby seems very stiff or very floppy, or their legs will not take any weight when you hold them upright.
- Your baby has lost a skill they had before, such as smiling, babbling or reaching.
Walk The Roller with someone who gets it
This page is the map. Willo is the daily companion: what to expect today, gentle nudges for this exact phase, and somewhere to put how you are feeling.
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Sources
- American Academy of Pediatrics. Movement Milestones: Babies 4 to 7 Months
- American Academy of Pediatrics. Safe Sleep: 9 Ways to Reduce a Baby's Risk of SIDS & Suffocation
- Nemours KidsHealth. Baby Sleep: 4- to 7-Month-Olds
- NHS. Your baby's first solid foods
Last reviewed 2026-08-24. Ranges are typical, not targets.
