When Do Babies Sit Up? Milestones & Tips | Parenting Hub
Babies usually sit with support around 4–6 months and independently by 7–9 months. Learn how to support sitting safely without propping.
Sitting independently takes core strength, head control and balance. Most babies sit with help around 4–6 months and on their own by 7–9 months. Floor time matters more than props.
Typical timing
- 4–5 months: head control is steady
- 5–6 months: sits propped on hands ('tripod sit')
- 6–7 months: sits without hands for short bursts
- 8–9 months: sits independently and can get into sitting from tummy
How to support sitting
Babies build sitting strength from tummy time and floor play — not from being propped up in seats.
- Daily tummy time and supervised floor time
- Sit facing each other on the floor with your hands at their hips for support
- Use a U-shaped pillow only briefly with very close supervision
- Limit time in Bumbo seats and bouncers — they don't teach sitting
Falls and safety
New sitters topple. Keep the floor clear of hard objects, and never leave a newly sitting baby on a couch or bed unattended.
When to see a doctor
See your GP or MCH nurse if baby isn't sitting with support by 6 months, isn't sitting independently by 9 months, or has unusual muscle tone.
When to seek help
- No head control by 4 months
- Not sitting with support by 6 months
- Not sitting independently by 9 months
- Loss of a skill previously gained
Common questions
Should I use a Bumbo seat?
Brief, supervised use is OK from when baby has solid head control. It doesn't build sitting muscles — floor time does. Never place a Bumbo on a raised surface.
Is W-sitting bad?
Occasional W-sitting is fine. Encourage other positions (side-sit, cross-legged) to support hip development.