Baby Care & Development

When Do Babies Roll Over? Signs, Ages and What to Do in the Crib

When do babies start rolling over — tummy to back first, then back to tummy? How to encourage it with tummy time, and what the AAP says about rolling during sleep, swaddling, and when you can stop turning your baby back.

Published: September 27, 2026

Reviewed by: Whispie Editorial Team Evidence-Based Parenting Research

Published: 2026-09-27

This article is for general information and is not a substitute for professional medical advice. Always consult your pediatrician or doctor about your child.

Sources: WHO, CDC, AAP and NHS guidance. Recommendations differ between countries — for local advice see the NHS or CDC.

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When Do Babies Start Rolling Over?

Rolling almost always happens in two stages, in a fairly predictable order. Babies roll from tummy to back first — the CDC's "Learn the Signs. Act Early." checklist (revised in 2022 with the AAP) lists "rolls from tummy to back" as a skill most babies, 75% or more, have mastered by 6 months.

Rolling back to tummy tends to follow a few weeks to a couple of months later, since it takes more core and trunk strength. According to the American Academy of Pediatrics' healthychildren.org, "most children roll from stomach to back before the opposite direction, although doing it in reverse is perfectly normal," and the skills involved in rolling "usually appear at about five months" — by the end of the 4-to-7-month window, most babies can roll both ways, though "the time frame varies for different babies."

Good to know:

Rolling isn't treated as a strict, stand-alone red-flag milestone the way sitting, crawling, or walking are — some healthy babies roll early, some roll later, and a few go from lying down almost straight to sitting with barely any rolling in between. It's still one of the first clear signs your baby is building toward independent movement.

Free tool: Baby Age Calculator: How Many Weeks or Months Old Is My Baby?

How to Encourage Rolling Over

You can't force rolling, but you can build the strength and motivation for it:

Daily, supervised tummy time from the first week — this builds the neck, back, and arm strength your baby needs to turn their body over. See our tummy time guide for a week-by-week plan.
Place a toy just out of reach, off to one side — during tummy time and while on their back, so your baby is motivated to twist toward it.
Give plenty of free floor space — a flat, safe surface, with less time in bouncers, car seats out of the car, and other gear that limits turning.
Get down at eye level — lying next to your baby so they're motivated to roll toward your face.

Tummy time is preparation for rolling and for the crawling that typically follows — read more in our baby crawling guide.

My Baby Rolls Onto Their Tummy During Sleep — Is That Safe?

This is one of the most common questions parents have once a baby starts rolling, and the short answer is reassuring. Place your baby on their back for every sleep — that remains the safest starting position through the first birthday, even once they can roll.

If your baby then rolls onto their stomach or side on their own, and can do it independently, in both directions — back to tummy and tummy to back — you don't need to get up and turn them back. That's the AAP's own guidance in its parent-facing safe sleep guide: "You should always place your baby to sleep on their back. But if they're comfortable rolling both ways (back to tummy, tummy to back), then you don't need to keep turning your baby to their back again."

What still matters, even once your baby rolls:

Always place baby on their back to start every sleep, every nap and every night.
A bare crib — no loose bedding, pillows, bumpers, or stuffed animals.
A sleep sack instead of a loose blanket.
No sleep positioners or wedges — there's no evidence they're safe or reduce risk.
A firm, flat mattress with a fitted sheet, nothing soft underneath.

The risk isn't rolling itself — it's the combination of an unsafe sleep surface with limited freedom to move, such as loose bedding in the crib. For the full safe sleep picture, see our safe sleep environment guide.

Rolling and Swaddling: When to Stop

As soon as you see your baby try to roll — during tummy time, in the crib, or anywhere else — that's the moment to stop swaddling. The AAP is explicit about this: "When your baby looks like they're trying to roll over, you should stop swaddling them. The risk of suffocation is higher if your baby rolls to their stomach while they're swaddled."

The reason is straightforward: a swaddled baby's arms aren't free. If they roll onto their stomach, they can't push up with their arms or turn their head to breathe freely. A sleep sack that leaves the arms free is the safer choice from the first sign of rolling attempts onward — it keeps your baby warm without limiting arm and leg movement.

My Baby Isn't Rolling Yet — When to Talk to the Pediatrician

Unlike sitting, crawling, or walking, rolling doesn't have one universally agreed "by this age" cutoff across every developmental system, so there's no single alarm age for this milestone specifically. Still, it's a useful thing to watch: the CDC lists "rolls from tummy to back" as a skill most babies have by 6 months. Bring it up at your next well-baby visit if you notice:

No active movement against resistance at all around 6 months — no pushing up during tummy time, no reaching, no squirming
A clear difference in strength or movement between the left and right side of the body
Little interest in moving or in their surroundings generally
Still struggling to lift their head during tummy time around 4 months

Track this alongside sitting, crawling, standing, and walking in our baby motor milestones guide, or use the developmental milestone checklist.

This article is part of our Daily Baby Care Guide.

Frequently Asked Questions

Does my baby roll from tummy to back first, or back to tummy first?

Usually tummy to back first. The CDC's "Learn the Signs. Act Early." checklist lists "rolls from tummy to back" as a skill most babies (75% or more) have by 6 months. The American Academy of Pediatrics (AAP) says on healthychildren.org that "most children roll from stomach to back before the opposite direction, although doing it in reverse is perfectly normal," and that by the end of the 4-to-7-month window, most babies can roll both ways.

How can I encourage my baby to roll over?

Daily, supervised tummy time from the first weeks of life is the main preparation — it builds the neck, shoulder, and core strength your baby needs to turn their body over. During tummy time and while lying on their back, place a toy just out of reach to one side so they're motivated to twist toward it, and get down on the floor at eye level so they're motivated to turn toward your face. See our full tummy time guide for a week-by-week plan.

My baby rolls onto their tummy during sleep. Is that dangerous?

Always place your baby on their back for every sleep, which remains the safest starting position through the first year. But if your baby then rolls onto their stomach or side on their own, and can roll both ways (back to tummy and tummy to back) under their own strength, you don't need to keep turning them back. That's the AAP's own guidance: "But if they're comfortable rolling both ways (back to tummy, tummy to back), then you don't need to keep turning your baby to their back again." Keep the crib itself bare — no loose bedding, pillows, bumpers, or stuffed animals — and use a sleep sack instead of a blanket.

Do I need to flip my baby back if they roll over and over during the night?

Not once they can roll both directions on their own. Waking up repeatedly to reposition a baby who is comfortably and independently rolling both ways isn't necessary or recommended by the AAP. If your baby can only roll one way so far — for example, tummy to back but not yet back to tummy — keep placing them back on their back if you find them face-down, since that's the stage where they can end up stuck in a position they can't get out of.

When should I stop swaddling because my baby is trying to roll?

As soon as you see the first signs of rolling attempts — whether during tummy time or at night. The AAP is direct about this: "When your baby looks like they're trying to roll over, you should stop swaddling them. The risk of suffocation is higher if your baby rolls to their stomach while they're swaddled." A sleep sack that leaves the arms free is the safer choice from that point on, since it keeps your baby warm without restricting the arm movement they need to turn their head or push up if they roll onto their stomach.

My baby is 6 months old and hasn't rolled yet. Should I worry?

Not necessarily, but it's worth keeping an eye on. The CDC's 6-month checklist lists "rolls from tummy to back" as a skill most babies have by that age, and healthychildren.org notes the skills involved in rolling typically appear around 5 months, with both directions usually in place by the end of the 4-to-7-month window. If your baby is showing little to no active movement against resistance at all — no pushing up during tummy time, no reaching, no squirming — bring it up at your next well-baby visit rather than waiting for the next checkup.