Real family data
Baby milestones: the ages babies actually hit them
The earliest milestone families record
First smile at 1 month
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Charts tell you a range. These are the median ages families actually recorded, with full distributions on every milestone page.
| Milestone | Half of babies by | Middle range |
|---|---|---|
| First smile | 1 month | 1 month to 2 months |
| First laugh | 3 months | 3 months to 4 months |
| Sleeping through the night | 3 months | 2 months to 6 months |
| Rolling over | 4 months | 3 months to 5 months |
| First solid food | 5 months | 5 months to 6 months |
| Sitting up | 6 months | 5 months to 7 months |
| First tooth | 7 months | 6 months to 9 months |
| Crawling | 8 months | 7 months to 9 months |
| Saying dada | 8 months | 7 months to 10 months |
| Standing up | 9 months | 8 months to 10 months |
| Saying mama | 9 months | 7 months to 10 months |
| First steps | 11 months | 11 months to 13 months |
The big question
Mama or dada: which comes first?
Among babies whose families recorded both words, dada came first for 45.6%, mama for 29.7%, and 24.7% recorded both at the same age.
See the full breakdown
The Baby Notebook app
Whenever it happens, it is worth keeping.
Every age on this page is a parent writing down what their own baby did, whenever they did it. Baby Notebook makes it easy to keep each one as it comes, from bump to first birthday. Free to download, and the first three chapters of every book are free.
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