2-Month-Old Baby Weight & Length Chart
The 2-month checkup is an exciting milestone. Most babies have grown 1–1.5 inches per month and gained about 1–2 lbs since birth.
Boy — 50th %ile
Girl — 50th %ile
⚖️ Weight by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 10 lbs 6 oz | 9 lbs 8 oz |
| 10th Percentile | 10 lbs 13 oz | 9 lbs 11 oz |
| 25th Percentile | 11 lbs 7 oz | 10 lbs 6 oz |
| 50th Percentile (median) | 12 lbs 6 oz | 11 lbs 4 oz |
| 75th Percentile | 13 lbs 4 oz | 12 lbs 2 oz |
| 90th Percentile | 13 lbs 14 oz | 12 lbs 13 oz |
| 95th Percentile | 14 lbs 9 oz | 13 lbs 4 oz |
📏 Length/Height by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 1' 10.2" | 1' 9.7" |
| 10th Percentile | 1' 10.4" | 1' 9.9" |
| 25th Percentile | 1' 10.7" | 1' 10.2" |
| 50th Percentile (median) | 1' 11" | 1' 10.5" |
| 75th Percentile | 1' 11.3" | 1' 10.8" |
| 90th Percentile | 1' 11.6" | 1' 11.1" |
| 95th Percentile | 1' 11.8" | 1' 11.3" |
📊 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
- Holds head up steadily during tummy time
- Social smiling (responds to your smile)
- Coos and gurgles
- Tracks objects past midline
The social smile emerges around 6–8 weeks — a huge developmental leap. Hearing is fully functional; your voice is their favorite sound.
🍼 Feeding at 2 Month Old
Breastfed babies still feed 8–12 times per day. Formula-fed babies take 4–5 oz every 3–4 hours. Total: ~24 oz formula per day.
🚨 Talk to Your Pediatrician If…
- Not smiling at people by 2 months
- Doesn't watch things as they move
- Not bringing hands to mouth
- Seems very stiff or very floppy
Frequently Asked Questions
What is a typical weight for a 2-month-old?
WHO median is 5.6 kg (12.3 lbs) for boys and 5.1 kg (11.2 lbs) for girls. Healthy range is roughly 4.7–6.5 kg (10.4–14.3 lbs).
How long is an average 2-month-old?
Median length is about 58.4 cm (23.0 in) for boys and 57.1 cm (22.5 in) for girls.
What vaccines does my baby get at 2 months?
The 2-month visit typically includes DTaP, Hib, IPV, PCV13, RV, and hepatitis B. Your pediatrician will confirm the schedule.
Should I worry if my baby is in the 10th percentile?
Percentile alone doesn't indicate a problem. What matters is consistent growth along a curve. Dropping across 2+ major percentile lines warrants a conversation with your pediatrician.