Real family data
Baby milestones: the ages babies actually hit them
Charts tell you a range. This is what really happened, from milestone memories recorded by thousands of families. Median age first, 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 breakdownThe Baby Notebook app
The dates blur together faster than you think
Every age on this page came from a parent who wrote it down while it was fresh. Baby Notebook makes it easy to capture each milestone as it happens, from bump to first birthday. Free to download.
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