5 month old baby weight
On the WHO growth standard, the average (median) 5-month-old baby boy weighs 7.5 kg (16.6 lb) and the average girl weighs 6.9 kg (15.2 lb). The usual range, from the 3rd to the 97th percentile, is 6.1 kg (13.4 lb) to 9.2 kg (20.3 lb) for boys and 5.5 kg (12.1 lb) to 8.7 kg (19.2 lb) for girls.
Weight percentiles at 5 months (WHO)
The median (50th percentile) is the average weight for this age.
| 3th | 15th | Median | 85th | 97th | |
|---|---|---|---|---|---|
| Boys (kg) | 6.1 | 6.7 | 7.5 | 8.4 | 9.2 |
| Boys (lb) | 13.4 | 14.7 | 16.6 | 18.6 | 20.3 |
| Girls (kg) | 5.5 | 6.1 | 6.9 | 7.8 | 8.7 |
| Girls (lb) | 12.1 | 13.4 | 15.2 | 17.3 | 19.2 |
Check your baby’s weight percentile
Enter a date of birth and at least one measurement to see the percentile.
Common questions
What is the average weight of a 5-month-old baby?
On the WHO growth standard, the average (median) 5-month-old baby boy weighs 7.5 kg (16.6 lb) and the average girl weighs 6.9 kg (15.2 lb). The usual range, from the 3rd to the 97th percentile, is 6.1 kg (13.4 lb) to 9.2 kg (20.3 lb) for boys and 5.5 kg (12.1 lb) to 8.7 kg (19.2 lb) for girls.
How much weight does a baby gain around 5 months?
Going by the WHO medians, about 117 g (4.1 oz) a week for boys and 109 g (3.8 oz) a week for girls in the month leading up to 5 months. Individual babies vary, and the trend over several weeks matters more than one weigh-in.
Is my 5-month-old underweight or overweight?
A weight between the 3rd and the 97th percentile is within the usual range. A baby who keeps following roughly the same percentile line is growing steadily. Talk to your pediatrician if the weight is below the 3rd or above the 97th percentile, or if the curve crosses two of the main percentile lines over a few months.
Full charts: baby weight chart by month · boys · girls · weight gain per week
Source: WHO Child Growth Standards, weight-for-age, percentiles computed from the WHO LMS tables at 5 completed months. For information only; not medical advice.