Most babies start crawling between 8 and 12 months old, though some begin scooting or pulling themselves forward as early as 6 months. The timeline varies widely, and crawling isn’t even considered a formal developmental milestone by the CDC because not all babies do it. Some skip crawling entirely and move straight to pulling up and walking.
The Typical Timeline
For a skill to qualify as an official developmental milestone, 75% of babies need to reach it by a certain age. Crawling doesn’t meet that threshold, which is why you won’t find it on the CDC’s milestone checklist. That said, the majority of babies who do crawl will start somewhere in the 8 to 12 month window.
Before crawling happens, your baby builds up to it through a predictable sequence. Purposeful movement develops from the head down. First comes head control during tummy time, then pushing up with the arms, then rolling over (usually between 3 and 6 months), then sitting without support. Between 6 and 12 months, most babies start crawling forward on their bellies, then transition to getting on all fours. Each of these steps builds the core strength and coordination needed for the next one.
Why Tummy Time Matters
A systematic review covering more than 4,200 infants across eight countries found that tummy time was positively associated with gross motor development, including the ability to crawl and roll. Babies who spent more time on their stomachs built the arm, neck, and trunk strength that supports forward movement. Tummy time also helped with overall physical development and even reduced the risk of flat spots on the back of the head. Starting short sessions early, even just a few minutes at a time in the first weeks, gives your baby a head start on the strength they’ll need later.
Different Crawling Styles
Not every baby crawls the same way. The American Academy of Pediatrics describes several common styles:
- Classic crawl: Hands and knees on the floor, moving one arm and the opposite knee forward at the same time.
- Bear crawl: Similar to the classic crawl, but with straight elbows and knees, so the baby walks on hands and feet.
- Commando crawl: The baby pulls forward with their arms while dragging their belly along the floor, military style.
- Bottom scoot: The baby sits upright and scoots forward on their bottom, using their arms for momentum.
All of these are normal. Some babies switch between styles before settling on one, and others invent their own hybrid approach. The style itself doesn’t indicate anything about your baby’s development.
What Crawling Does for the Brain
Crawling is one of the earliest forms of cross-lateral movement, where the body coordinates actions across its midline (right arm with left knee, then left arm with right knee). This type of movement engages both hemispheres of the brain simultaneously. Each time your baby crawls, it strengthens the connection between the left and right brain, building the neural pathways that later support focus, problem-solving, emotional regulation, and even reading comprehension. Reading, for example, relies on the left hemisphere for decoding words and the right hemisphere for understanding meaning, so those two sides need to communicate well.
Crawling also increases respiration and cellular oxygenation, which supports overall brain function. It’s essentially a full-body workout that trains the brain and muscles at the same time.
What If Your Baby Skips Crawling?
Some babies never crawl. They roll, scoot, or go straight to pulling up on furniture and cruising. This is common enough that the CDC doesn’t list crawling as a milestone at all. By the 1-year mark, the milestones they do track include pulling up to stand, walking while holding onto furniture, and drinking from a cup.
A 2022 study published in the International Journal of Environmental Research and Public Health followed children to age 7 and found no differences in weight, height, muscle mass, lung function, motor competence, or physical fitness between kids who crawled and those who didn’t. Children who crawled did show slightly lower body fat percentages and lower blood pressure, and brain-imaging-style network analysis revealed more interconnections among their body composition and fitness variables. But the practical takeaway is reassuring: skipping crawling does not put your child at a developmental disadvantage for motor skills or coordination.
Encouraging Your Baby to Crawl
You can’t force crawling, but you can create conditions that make it more likely. Give your baby plenty of supervised floor time on their stomach. Place a favorite toy just out of reach to motivate forward movement. Get down on the floor yourself, because babies are more motivated to move toward a face than toward an empty room. Avoid leaving your baby in bouncers, walkers, or seats for extended periods, since these limit the opportunities to practice weight-bearing on hands and knees.
If your baby is 12 months old and isn’t crawling, scooting, or showing any interest in moving across the floor, it’s worth mentioning to your pediatrician. The concern isn’t the absence of crawling specifically but the absence of any self-directed mobility. Most of the time, babies are simply working on their own timeline.
Baby-Proofing for New Crawlers
The moment your baby starts moving independently, your home needs a safety reassessment. A baby who was stationary yesterday can reach electrical outlets, pull on tablecloths, and find small objects on the floor today. The transition happens fast.
Start with the highest-risk changes: anchor heavy furniture and TVs to the wall, install safety gates at the top and bottom of stairs, and put locks on cabinets that contain cleaning products or medications. Cover electrical outlets and add doorknob covers to rooms you want off-limits. In the kitchen, install stove knob covers and consider appliance locks on the oven and refrigerator. Get down on your hands and knees yourself to see the room from your baby’s perspective. You’ll spot hazards, like dangling cords, coin-sized objects under the couch, and sharp table corners, that are invisible from adult height.
Each new mobility milestone, from crawling to pulling up to walking, changes what your child can access. Treat baby-proofing as an ongoing process rather than a one-time project.