Newborn Baby Weight & Length Chart
Most newborns weigh between 5.5 and 10 lbs at birth. It's completely normal for babies to lose up to 7–10% of birth weight in the first few days before regaining it by day 10–14.
Boy — 50th %ile
Girl — 50th %ile
⚖️ Weight by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 6 lbs 3 oz | 5 lbs 15 oz |
| 10th Percentile | 6 lbs 6 oz | 6 lbs 3 oz |
| 25th Percentile | 6 lbs 13 oz | 6 lbs 10 oz |
| 50th Percentile (median) | 7 lbs 4 oz | 7 lbs 1 oz |
| 75th Percentile | 7 lbs 11 oz | 7 lbs 8 oz |
| 90th Percentile | 8 lbs 3 oz | 7 lbs 15 oz |
| 95th Percentile | 8 lbs 10 oz | 8 lbs 3 oz |
📏 Length/Height by Percentile
| Percentile | 👦 Boy | 👧 Girl |
|---|---|---|
| 5th Percentile | 1' 7" | 1' 6.7" |
| 10th Percentile | 1' 7.1" | 1' 6.8" |
| 25th Percentile | 1' 7.4" | 1' 7.1" |
| 50th Percentile (median) | 1' 7.6" | 1' 7.3" |
| 75th Percentile | 1' 7.9" | 1' 7.6" |
| 90th Percentile | 1' 8.2" | 1' 7.8" |
| 95th Percentile | 1' 8.3" | 1' 8" |
📊 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
- Lifts head briefly when on tummy
- Focuses on faces 8–12 inches away
- Startles to loud sounds
- Brings hands to face
All senses are active at birth. Your baby already recognizes your voice from the womb and prefers the smell of breastmilk.
🍼 Feeding at Newborn (Birth)
Newborns typically feed every 1.5–3 hours — 8–12 times per day. Colostrum transitions to mature milk around days 3–5.
🚨 Talk to Your Pediatrician If…
- Birth weight drops more than 10%
- Has not regained birth weight by 2 weeks
- Fewer than 6 wet diapers per day after day 4
- Yellowing skin after day 2 (jaundice)
- Not waking to feed every 3–4 hours
Frequently Asked Questions
Is it normal for a newborn to lose weight?
Yes — losing up to 7–10% of birth weight in the first 3–5 days is normal as the baby passes meconium and feeds colostrum. Most babies return to birth weight by 10–14 days.
What is the average newborn weight?
The WHO median for newborn boys is 3.3 kg (7.3 lbs) and for girls is 3.2 kg (7.1 lbs). A healthy birth weight range is generally 2.5–4.0 kg (5.5–8.8 lbs).
How much should a newborn grow per week?
After regaining birth weight, newborns typically gain about 5–7 oz (140–200 g) per week in the first month.
When should I worry about my newborn's size?
Talk to your pediatrician if your baby is significantly outside the 5th–95th percentile range, or if growth rate slows unexpectedly between checkups.