As a parent, one of the first things you'll notice about your newborn is how closely medical professionals monitor their weight. And it's no surprise—your baby's weight is a good indicator of their overall health and development. But what does everyone mean by "healthy" weight? How much weight should your baby gain per month? If you're worried about your child's growth, take a deep breath and keep on reading.
Understanding your baby’s birth weight
Newborns come in a variety of shapes and sizes. An average full-term baby (born between 37 and 40 weeks) weighs between 5 lbs (2.5 kg) and 8 lbs (4 kg). It is perfectly normal for babies to be slightly above or below this range. Some factors that influence birth weight are:
- Genetics: Taller parents often have larger babies, whereas petite parents may have smaller babies.
- Pregnancy length: Babies born before 37 weeks are generally smaller, whereas overdue babies may weigh more.
Weight changes in the first few weeks
Newborns usually lose weight in their first few days. It is perfectly normal for infants to lose 7-10% of their birth weight due to fluid loss. But don't worry—by the end of the second week, most babies have recovered their birth weight. If your little one hasn't regained the previously lost weight within 14 days, consult your healthcare provider for a detailed assessment and advice.
How much should my baby weigh each month?
Remember that these are general guidelines; some babies gain weight quickly, while others take their time. What's most important is consistent growth.
- 1 month: 7-11 pounds (3.2-5 kilograms)
By the end of the first month, your baby should have regained their birth weight and begin gaining approximately 1 ounce (30 grams) per day. At this stage, babies typically eat every 2-3 hours, and frequent feedings promote healthy weight gain. It is completely normal for newborns to lose some weight in the first few days before gaining it back. Trust your baby's hunger cues and allow them to feed on demand.
- 2 months: 9-13 pounds (4-6 kilograms)
Your baby grows steadily, gaining 1.5 to 2 pounds (0.7 to 0.9 kg). They may begin to develop more rounded cheeks and chubby thighs, which is perfectly normal and healthy. If you are breastfeeding, your baby may continue to want to feed frequently, whereas formula-fed babies may begin to space out their feedings slightly.
- 3 months: 10-15 pounds (4.5-7 kilograms)
Your baby will almost weigh twice as much as they did at birth. They continue to gain about 1 ounce per day, and their appetite increases simultaneously. You may also notice more wakeful periods as your baby becomes more alert and interacts with their surroundings.
- 4 months: 12-17 pounds (5.5-7.7 kilograms)
At this point, your baby will be twice their birth weight. As their daily milk intake increases, they become more active, kicking their legs and moving their arms. Some babies may experience a growth spurt, which causes them to be hungry more often. If your baby seems especially fussy or wants to eat more frequently, they may be experiencing a growth spurt.
- 5 months: 13-18 pounds (5.9-8.2 kilograms)
Weight gain may slow slightly compared to earlier months. However, your baby is still growing at a healthy rate. They may also become more curious about their surroundings, reaching out and grabbing more. Playtime and tummy time are essential at this stage so that your little one may develop the strength needed for future milestones.
- 6 months: 14-20 pounds (6.4-9 kilograms)
Most babies begin solid foods around this time (as recommended by their pediatrician). While breast milk or formula remains the primary source of nutrition, introducing small amounts of pureed fruits, vegetables, and cereals can help with healthy weight gain. Some babies enjoy solids right away, while others need time to adjust—both reactions are normal.
- 7 months: 15-21 pounds (6.8-9.5 kilograms)
Your baby may start moving more, such as rolling over or attempting to crawl. This increased activity may slightly slow weight gain, which is perfectly normal since they are also burning calories with movement. Babies at this age enjoy exploring through touch and taste, so including a variety of textures in their diet can be an effective way to keep them engaged with eating.
- 8 months: 16-22 pounds (7.3-10 kilograms)
At this stage, your baby will consume solid foods two to three times per day in addition to breast milk or formula. You may notice changes in their appetite, but as long as they continue to grow steadily, there is no need for concern.
- 9 Months: 17-23 pounds (7.7-10.4 kilograms)
Many babies begin to crawl or scoot around, which burns more calories. Some babies gain weight slowly, but consistent growth is what matters most. You may notice that your baby is more interested in playing than eating at times, which is normal as long as they receive proper nutrition throughout the day.
- 10 months: 18-24 pounds (8.2-10.9 kilograms)
Babies are usually much more active by now, pulling themselves up, cruising along furniture, and even attempting to walk. When weight gain slows, it is usually due to increased activity rather than a feeding problem. If your baby appears healthy and happy, they're probably on the right track. To maintain a balanced diet, offer a variety of protein, fruits, vegetables, and whole grains.
- 11 months: 18-25 pounds (8.2-11.3 kilograms)
Your baby may be standing, cruising around furniture, or even taking their first steps! Your little one may become a picky eater, but keep giving them a variety of foods and textures in their diet so that they get proper nutrition.
- 12 months (1 year): 19-26 pounds (8.6-11.8 kilograms)
By their first birthday, most babies weigh roughly three times their birth weight. Some are lean and active, while others are a little chubbier—both are completely normal! At this point, your baby may be drinking less formula or breast milk as they rely more on solid foods.
What if my baby’s weight does not fall within these ranges?
Don't panic if your baby's weight appears to be higher or lower than expected. Growth patterns vary from baby to baby, with genetics playing an important role. However, if you notice any of the following, consult with your healthcare provider:
- Slow weight gain
- After the first two weeks, your baby's weight gain has been inconsistent.
- Your baby appears weak, lethargic, or uninterested in feeding.
- Your baby has fewer than six wet diapers per day (after the first week).
- Rapid weight gain
- You notice your baby consistently gaining more than two pounds per month.
- Your baby has difficulty feeding or appears overly fussy after meals.
It is natural to compare your baby's weight to that of others, but keep in mind that each baby grows at their own pace. Rather than focusing on numbers, consider the bigger picture. Is your baby Happy? Alert? Gaining weight consistently over time? If so, you're doing great! So, take a deep breath, enjoy those baby cuddles, and trust that your little one is developing exactly as they should.
