Real family data
When Do Babies Actually Sit Up? Real Ages from Thousands of Families
Half of babies sit up by 6 months, based on real entries from the Baby Notebook community. The most common age was 6 months; the middle half fell between 5 months and 7 months.
| Age | Share of families |
|---|---|
| 4 months or earlier | 6.7% |
| 5 months | 29.7% |
| 6 months | 34.2% |
| 7 months | 17.6% |
| 8 months | 6.7% |
| 9 months | 2.6% |
| 10 months | 1.3% |
| 11+ months | 1.3% |
Boys and girls: boys averaged 6 months and girls 6.1 months.
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