how old are babies when they sit up

Babies usually start sitting up with some support around 4–6 months and can often sit without support somewhere between about 7–9 months, but there is a wide range of normal and every baby is different.

Typical age range

• Many babies can sit with support (your hands, pillows, a seat) between about 4–6 months as their neck and trunk muscles get stronger.

• Sitting independently (without leaning on hands or being propped) often develops around 7–9 months, and some may get into a sitting position by themselves closer to 9 months or a bit later.

Signs baby is getting ready

• Good head control when held upright and during tummy time.
• Able to roll and show “tripod sitting” (leaning forward on hands for balance), which often appears before fully steady sitting.

How to support sitting safely

• Give plenty of supervised tummy time to build neck, shoulder, and core strength.
• Let baby practice sitting on the floor between your legs or with pillows around, always supervised, and avoid leaving them in seated gear for long stretches.

When to talk to a doctor

• If your baby is not showing any ability to sit with support by around 9 months, or you notice very floppy or very stiff muscles, it is a good idea to check in with your pediatrician for a personalized assessment.

Information gathered from public forums or data available on the internet and portrayed here.