5-Month-Old Baby Weight & Length Chart
At 5 months, your baby is likely rolling both ways and grabbing everything in reach. Growth continues at a strong pace — about 1–1.25 lbs per month.
Boy — 50th %ile
Girl — 50th %ile
⚖️ Weight by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 13 lbs 14 oz | 12 lbs 13 oz |
| 10th Percentile | 14 lbs 5 oz | 13 lbs 4 oz |
| 25th Percentile | 15 lbs 7 oz | 14 lbs 2 oz |
| 50th Percentile (median) | 16 lbs 9 oz | 15 lbs 3 oz |
| 75th Percentile | 17 lbs 10 oz | 16 lbs 5 oz |
| 90th Percentile | 18 lbs 12 oz | 17 lbs 3 oz |
| 95th Percentile | 19 lbs 6 oz | 17 lbs 14 oz |
📏 Length/Height by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 2' 1" | 2' 0.3" |
| 10th Percentile | 2' 1.3" | 2' 0.5" |
| 25th Percentile | 2' 1.6" | 2' 0.9" |
| 50th Percentile (median) | 2' 1.9" | 2' 1.2" |
| 75th Percentile | 2' 2.3" | 2' 1.5" |
| 90th Percentile | 2' 2.6" | 2' 1.9" |
| 95th Percentile | 2' 2.9" | 2' 2.1" |
📊 What Does My Baby's Percentile Mean?
A baby at the 50th percentile weighs more than 50% of babies the same age. The 25th–75th percentile range is considered average. Any percentile from the 5th to the 95th is medically normal — your baby's growth curve matters more than their rank. A consistently healthy 10th-percentile baby is thriving; a baby who drops from the 70th to the 30th percentile warrants a conversation with your pediatrician.
🌟 Developmental Milestones
- Rolls from back to tummy
- Sits with support
- Passes objects hand to hand
- Responds to name
Object permanence is beginning to develop — your baby is starting to understand that things still exist when out of sight, which is also why separation anxiety is coming soon.
🍼 Feeding at 5 Month Old
Continue breast milk or formula on demand. Most 5-month-olds take 4–6 oz per feed, 5–6 feeds per day (~28–32 oz formula total).
🚨 Talk to Your Pediatrician If…
- Doesn't roll in either direction
- Doesn't try to reach for objects
- Doesn't make vowel sounds
- Seems very stiff or floppy
Frequently Asked Questions
How much should a 5-month-old weigh?
WHO median is 7.5 kg (16.5 lbs) for boys and 6.9 kg (15.2 lbs) for girls. Healthy range: roughly 6.3–8.8 kg (13.9–19.4 lbs).
When do babies sit up on their own?
Most babies sit independently between 6–9 months. At 5 months, sitting with support (in your lap or propped with pillows) is typical.
How much tummy time does a 5-month-old need?
Aim for 30+ minutes of tummy time per day spread across multiple sessions. This builds the core strength needed for sitting and crawling.
Is it normal for breastfed and formula-fed babies to have different growth patterns?
Yes — breastfed babies tend to grow faster in the first 3 months and then slow slightly compared to formula-fed babies. WHO charts are based on breastfed infants and reflect this pattern.