what weight to turn car seat around

[SanJameson]

The minimum weight to turn your child's car seat to face forward is typically 40 pounds, but safety experts strongly recommend keeping children rear-facing for as long as possible, often until they reach the maximum weight or height limit of their convertible car seat, which can be 50 pounds or more. The American Academy of Pediatrics (AAP) advises that children should remain rear-facing until at least age 2, but shifting the focus to the seat's limits rather than just age or a minimum weight provides significantly greater protection.

The primary reason for this is physics. In a frontal crash—the most common and severe type of collision—a rear-facing seat cradles the child's head, neck, and spine, distributing the crash forces across the entire shell of the car seat. A forward-facing seat restrains the child by the harness, but the head and neck are thrown forward, placing immense stress on the neck and spinal cord. For a toddler, whose vertebrae are still developing and connected by cartilage, this force can be catastrophic.

The key is to consult your specific car seat's manual and your vehicle's owner's manual. Convertible car seats have clearly stated rear-facing weight and height limits. Here is a general guideline based on common seat types:

Car Seat Type	Typical Rear-Facing Weight Limit	Typical Forward-Facing Weight Limit	Key Consideration
Infant-Only Seat	30-35 lbs	N/A	Outgrown by height when head is 1" below shell.
Convertible Seat	40-50 lbs	65 lbs (with harness)	Allows extended rear-facing; check height limit.
All-in-One Seat	40-50 lbs	65-100 lbs (with harness)	Highest rear-facing limits; check manual.

Do not rush the transition. The moment your child hits the minimum requirement is not the finish line; it's the starting point for maximizing safety. Ensure the harness is snug, the chest clip is at armpit level, and the seat is installed tightly with less than one inch of movement at the belt path. Your child is safest rear-facing, so use every pound and inch your seat allows.

[VonRachel]

As a parent who just went through this, the "40 pounds or age 2" is the bare minimum. Our pediatrician said to ignore that and focus on the seat's max limits. Our convertible seat goes to 50 pounds rear-facing, so that's our goal. It feels counterintuitive when their legs get long, but it's way safer. They just cross their legs or prop them up on the seat back. It's a no-brainer when you see the crash test videos.