Average Weight of Babies per Month
Most babies double their birth weight by five to six months of age and triple it by the time they are a year old. The average weight at six months is about 16 pounds 2 ounces (7.3 kg) for girls and 17 pounds 8 ounces (7.9 kg) for boys. On average, babies grow 0.5 to 1 inch (1.5 to 2.5 cm) each month from birth to 6 months. From 6 to 12 months, babies grow an average of 3/8 inch. Your doctor will measure and weigh your baby at routine checkups and mark their progress on a standard growth chart.
Birth to 1 month: The average newborn gains 2/3 to 1 ounce a day and grows 1 to 1 1/2 inches in length over the course of the whole month. Remember that most babies lose some weight during the first few days of life, but usually regain this weight over the next few days so that within a week to 10 days they’re back to their original birth weight.
1 to 4 months: Babies usually gain 1, 1/2 to 2 pounds and grow 1 to 1 1/2 inches each month. During this time, your baby may begin looking chubby; however as her activity level increases, those baby rolls will soon be replaced by developing muscle.
By 6 months: Most babies have doubled their birth weight.
By 12 months: Most babies have usually tripled their birth weight and will have grown 9 to 11 inches from their original birth length.
By 24 months: Most babies have quadrupled their birth weight and will have grown 14 to 16 inches from their birth length.
At each of your baby’s well visits your pediatrician will track your child’s weight,height, and head circumference on a growth chart. This standard chart was developed from data using national surveys and doctors use it to determine the progress your baby is making compared with other babies of the same age and sex. Many parents worry if their baby’s measurements are on the high or low end of the chart. While these concerns are normal, remember that your child’s percentile is not as important as the fact that she’s growing consistently. If your pediatrician isn’t concerned about your child’s size or growth patterns, you shouldn’t worry either.
What can you do if your child is behind on the growth charts?
There are many things you can do to support baby’s growth that are natural and healthy.
Call a lactation consultant
If you’re breastfeeding but baby is not gaining or growing well, that does not necessarily mean you don’t have enough milk. Baby can only eat what he can remove from the breast, and if he has a bad latch or a lip or tongue tie , he can’t remove milk well. Formula may be needed in the short term (because, yes, fed is best), but breastfeeding can almost always work with the right support (and it gets easier too! ). A lactation consultant is a great first step to getting back on track.
If you do need to supplement, you don’t have to go with a brand that contains questionable ingredients. There are better brands out there and even homemade versions that can help keep baby’s gut health intact and keep him growing well.
If your baby is 6–12 months old and not growing well, make sure he gets enough breast milk or formula but also be sure to introduce solids so she can get added nutrition. Pasture-raised meats (even liver!), pastured egg yolks, whole fat yogurt, coconut cream, avocado, banana and squashes are all excellent nutrient- dense foods for baby that will help him head north on the baby weight chart. If you have a picky eater (over 1 year old) and think that’s to blame for slow weight gain, check out our tips for getting them to eat.
Support digestive health
You can also support baby’s digestive health, which can help him absorb nutrition more readily. Breast milk is an excellent way to heal and soothe baby’s gut. Some babies need added probiotics to help them with digestion and absorption of nutrients. You can also add an infant probiotic to baby’s diet directly by placing a drop on your nipple, finger, or pacifier before baby starts suckling. In addition, you can offer fermented foods (beet kvass is easy because it’s in liquid form) as well as prebiotic foods, like under-ripe bananas, to feed the good bacteria.
A gut-healing diet (for older babies and toddlers) may be helpful for some. A damaged gut doesn’t absorb nutrients properly, so baby won’t grow as well. And you probably already know that gut health is the cornerstone to good health! Like a strong immune system, a healthy mood, and more. A healing diet like GAPS (Gut and Psychology Syndrome) or AIP (Autoimmune Protocol) may be needed for some to reset the immune system and heal the digestive tract. These diets eliminate allergens and inflammatory foods, and advocate for highly nutritious foods like grass-fed meat, organ meats, healthy fats, and vegetables while giving special probiotics to repopulate baby’s gut.
Breastfeeding mamas can try these gut-healing diets too. If you’re eating something that irritates baby through your breast milk, then cutting it out—even for just a short time—will help baby’s gut and immune system to calm down so that you can add it back in with no (or fewer) problems.
Just like a snowflake, every baby is different. As long as your baby is growing steadily along his own curve, then there is usually nothing to worry about. But when you do need help, rest assured—there are simple, natural things you can do to support baby’s body in growing big, strong and healthy.
Remember, this is just a reference. If you have concerns that your child is gaining too much weight or not enough , you should contact the doctor.