Real family data
When Do Babies Actually Smile? Real Ages from Thousands of Families
Half of babies smile for the first time by 1 month, based on real entries from the Baby Notebook community. The most common age was 1 month; the middle half fell between 1 month and 2 months.
| Age | Share of families |
|---|---|
| 1 month | 57.2% |
| 2 months | 35.2% |
| 3 months | 4.9% |
| 4 to 5 months | 1.4% |
| 6+ months | 1.2% |
Boys and girls: boys averaged 1.6 months and girls 1.6 months.
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