Your baby at 6 months
Everything that lines up at this one age — growth figures from the WHO standard, sleep norms, the milestones whose normal window covers this month, and the vaccine doses due. Percentiles are called centiles in the UK; the numbers are identical.
Growth at 6 months
Median means half of babies are above and half below. Being away from the median is not a problem in itself — following your own curve is what matters.
| Median (50th) · Boys | Middle half (25th–75th) · Boys | Median (50th) · Girls | Middle half (25th–75th) · Girls | |
|---|---|---|---|---|
| Weight | 7.94 kg | 7.37–8.54 kg | 7.30 kg | 6.73–7.93 kg |
| Length | 67.6 cm | 66.2–69.1 cm | 65.8 cm | 64.2–67.3 cm |
| Head circumference | 43.3 cm | 42.5–44.2 cm | 42.2 cm | 41.3–43.1 cm |
Want the number for your own baby? Open the percentile calculator
Sleep at 6 months
Ranges, not targets. Healthy babies sit outside them regularly.
- Total per day
- 12 h – 16 h
- One nap
- 30 m – 1 h 30 m
- Night sleep
- 10 h – 12 h
Milestones in this window
The window is when a skill usually appears — not a deadline. Appearing later than the window is a reason to mention it at a check-up, not to worry alone.
- Rolls overGross motorusual window: 3–6
- Sits unsupportedGross motorusual window: 4.5–8
- CrawlsGross motorusual window: 6–11
- Grasps objectsFine motorusual window: 3–6
- BabblesSpeechusual window: 4–9
- LaughsSocialusual window: 3–6
Vaccine doses at this age
Routine doses only, from the national schedules as published by each country's health authority. Vaccinations always follow chronological age, even for premature babies.
United States
- DTaPdose 3
- Hepatitis Bdose 3
- Hibdose 3
- Influenzadose 1
- Polio (IPV)dose 3
- Pneumococcal (conjugate)dose 3
- Rotavirusdose 3
Reference figures, not medical advice. Every baby differs; a check-up answers questions a table cannot.