How Much Should a 6-Month Old Weigh?


I have a now seven-month-old boy, who started crawling four days before his seven-month birthday. At six-month appointment, he weighed 17 pounds and 14 oz. I am guessing he weighs in the 18 pound, couple of oz’s range. Is this normal or is it too low? I hear of some six-month-old babies that are 20 pounds or more. He is rather long, maybe about 28 inches plus.

Dr. Greene's Answer

Ashley, healthy babies come in many shapes and sizes. At six months, anywhere between 14 and 21 pounds is considered a healthy weight for boys. (Although, five percent of healthy boys weigh less than 14 pounds and five percent of healthy boys weight more than 21 pounds). Healthy boys who are 28 inches long, whatever their age, usually weigh 16 to 22 pounds. So 17 or 18 pounds is a great weight for an active boy to be!

Most adults who are reading this would rather they were on the slim, active side of their ideal weight range! Ashley, it sounds like you have a wonderful son, off to a great start. And it sounds like your crawling son has some exciting adventures and discoveries ahead.

Last medical review on: September 11, 2010
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Dr. Greene is a practicing physician, author, national and international TEDx speaker, and global health advocate. He is a graduate of Princeton University and University of California San Francisco.
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Recent Comments

My baby boy is 6months. He weighs 8.4kg. He can sit, crawl and stand while holding on a support. I’m finding it a bit daunting to extend his feeding from breast milk to solid. He is recalcitrant when it comes to feeding on solids…


At 6months old, it’s important for babies to work on the skills they will need longterm for eating solid foods and they learn to enjoy the taste of real, whole foods. But it’s not so important they get a lot of their calories from solids.

Dr. Greene suggests offering a variety of foods to babies between 6 months and a year old, but not forcing them to “take another bite”. Here is a link to his Quick Guide for Starting Solids.

My baby boy is now on 9th of dec becomes 6 months old and weights 10.50 kg . He started crowling by help and he makes very nice sounds and loves to eat and drink . In this duration from newborn to naw as he is 6 months old i have fed him just with breast milk now started some frutes and light vegtable foods. But is pushing all the time hech becomes red and weats while pushing . I am too worry .

My baby girl is now 6 months old her weight is 6.3 kg is it ok ??


Thanks for writing in.

A baby’s normal weight at any given age is based on a combination of factors: Birth weight, height, and rate of growth.

Dr. Greene says, “In the first four to six months, a baby typically doubles her birth weight. She will triple her birth weight by the time she is a year old. Maximal brain growth also occurs during the first six months of life. The brain grows as much during a child’s first year as it will during the entire rest of her life.”

I hope that helps.
Best, @MsGreene
Note: I am the co-founder of, but I am not Dr. Greene and I am not a doctor. Please keep that in mind when reading my comments and replies.

My daughter is 8 months and weighs 5.8 am very worried cos she takes in any food can u pls help me

My 7months baby girl weighs only 6.7kgs please is it normal m getting worried now

My 6 months old boy weights 10 kilo and his height is 72.5 cm he is rolling not crawling yet even though he attempts to it
He is only breastfed! I’m afraid he is too heavy comparing to his pear I’m a petite lady his father is very skinny but tall I don’t really get why is he gaining too much ?

My babby boy is 6months old.his weight is me how gain his weight

My grand daughter 6 months weight is 6.7,is this normal?

My Baby is 6months and is 6.5kg, he is 68cm in height. He doesn’t like eating, tried different baby food. Even baby puree,it’s always fight to eat them. What do I do for him to gain weight, or at least be eating well.

Hi Juddie,

Thanks for writing in.

At this age, babies get most of their calorie needs from breast milk or formula. The introduction of solid food is to teach babies to love the taste of foods. Most babies will not enjoy the taste of some solid foods at first, but after several tastes they will learn to love them.

Dr. Greene is a firm believer in letting kids set the amount of solid foods they eat. Speaking about the process of starting solids, he says, “… your son will begin to get the idea of closing his lips and swallowing. Once he does, you can begin to monitor the amount of food he needs. In order to determine this, (which is not a pre-determined amount, but varies from child to child) let him feed himself or, if you use a spoon, keep moving the spoon towards his mouth and look for signs that he is losing interest. If he turns his head away, clamps his lips shut, or appears bored, it is time to stop. Otherwise, keep moving the spoon to his mouth as long as he keeps opening it and looking happy.”
I hope that helps.
Best, @MsGreene
Note: I am the co-founder of, but I am not Dr. Greene and I am not a doctor. Please keep that in mind when reading my comments and replies.

My son is 6 months and his weight is 12.5 kg. Is his weight fine or not? What should I do

My daughter is 6month and she weigh this weight ok for her?

my son he has completed 6 months. His weight is 6kg . I wanted to know how to gain weight

my son is 6 months and weight 18.3 pounds and is 26 inches

my son is 6 months and weight 20 pounds and is 28 inches…. his doctor said hes over weight for me to slow him down on foods and give him more water? is his weight fine or what should I do?

My son is six months old eating baby food and 4 ounces every 6-7 hours he’s 26 puonds and is growing very fast he is crawling and pulling him self up and walking along tables babies grow at there own past so don’t be worried

Hi Doctor my Son is 6 months and he weigh’s 21 pounds is that normal?

Hi my daughter was 7lb 3oz at birth. She’s breastfed numerous times through out the day. Never seems to be overly hungry, always satisfied. She’s now 7 months weighs 14.8lb. Is she underweight? She refuses solids.

My baby was 6 pounds 5 ounces at birth and is now six and a half months… almost 7 months old and is 15 pounds. So I think it’s pretty normal


Weight in infants is related to age and height. Your daughter’s doctor should be keeping a chart that tracks her growth curve over time. Have you asked him or her to show you the chart?

It’s important for your daughter to be exposed to the tastes of solid food during her first year, even she isn’t getting most of her calories from solids. You can get more information from Dr. Greene about starting solids here.

Best, @MsGreene
Co-founder & Executive Producer,
Note: I answer a lot of questions on, I am the co-founder of, Dr. Greene’s business partner and wife, but I am a not doctor. Please keep that in mind when reading my comments and replies.

Hi Doctor. My daughter is 6 months. she weighs 19lbs and height is 27 1/2. I was just wondering is that okay? Healthy?

Hi Tyra,

Your daughter’s pediatrician should be tracking her growth over time. It’s important to evaluate weight and length based on her growth curve, not just one point in time.

I hope that’s helpful,
Co-founder & Executive Producer, Mom
Note: I answer a lot of questions on, I am the co-founder of, Dr. Greene’s business partner and wife, but I am a not doctor. Please keep that in mind when reading my comments and replies.

Today, 11 Nov 16, my daughter turned to 6 months. She now weighs 14.11 lbs and 25 1/2 inches long. She hasn’t eat anything yet because she just woke up when the weighed her in the clinic. She was 14.6 lbs and 24 1/2 inches long at 4 months. She has been eating well but drooling a lot and loves to bite things. The weight got me all worried! My daughter was 6.5 lbs and 19 1/2 inches long when born. Any assistance is appreciated. Thank you

Hi,my baby is 6 months old and she weighs 5.6,she’s very light yet her doc says she’s right on track,is this right?

Hi Doctor, my baby weighed 2.9 KG during her birth… Now she weighs only 6 kg,,,, she is very active but I am worried about her growth please let me know…. I will be waiting for the reply

How old is your daughter? Has she has regular check-ups?

My daughter was 6.7 @ birth an as of TODAY she is 14 lbs 92nd 13 oz and 26inches is that a healthy weight?

Hello Dr. I have a girlfriend who produced a baby child at 6 months of pregnancy. Which made me astonished is that he was sent home immediately without putting a baby in incumbent. Can really that happen? How many kilograms may be having at his birth?
Thanks a lot.

My son is 6 months .he weight 24 pound and height 28 inches
I am wondering if he is over weight

My baby is 6months and weighs 6kg and its regarded as under weight is he in trouble of any sickness cause am worried

Hi Doctor baby boy is almost 7 months old .He Weighs 12 kgs .. He is quite active , my problem is during tummy time he throws up a bit and struggles to move ..

My daughter is 6 months old. Her birth weight was 7lbs and she is now weighing 14.75 lbs and she is 28 inches long. People keep telling me that she is too small. She is very active, she is crawling and holding on and standing up and if you hold her hands, she will make steps. I’m worried though because even her doctor says she needs to put on some weight.

Your baby should be double their original birth weight after 6 months! So you’re baby sounds right on track! At a year, the original birthweight is expected to be triple! :)

Nick Gilroy

My baby girl is 5 months 10 days. She looks very healthy and she is always very active and playful. The only problem is that she just weighed 5.2 Kgs. Is her growth okay? Is healthy? Kindly, I need your quick advice.

Ma baby is 6 months en weigh 5.7kgs, is she under weight?

My baby is 5.5months and weighs 8.3kg. High side u know.

My girl will be 6 months tomorrow. She was 13lbs 5 at 5 months so I’m guessing she’ll be around 13lbs 12 now. She’s a greedy so and so but still sticks to her 9th centile line. You have absolutely nothing to worry about! :)

Hi, my baby girl just turned 4 months and her weight is 22 pounds she still wakes up every 2 hours for her feedings… I am so sleep deprived but my doctor is fine with her weight…she is such a butter. Ball … Shes already wearing some 12 month old clothes…

Wow my lil girl is 6 months and 22 pounds she’s at 100 % for height and weight. I’m 5″3 so it’s so strange having a big baby.

My baby is 6 months old and weighs 22 pounds and 26 inches long she’s in size 24 months is that okay

Hi, my baby girl is 7 months old, she weights about 17 pounds and is 69cm long. She eats breastmilk + formula + solides since she turn 6 months old. She only takes 4oz bottles, even before formula and solids. All my friends babies and on the internet mum’s blog, says their babies eat around 6 to 8oz bottles. Should i be worried???

Breastmilk adjusts to your baby’s needs unlike formula. So 4oz of breastmilk is perfect! Mine only eats 4 ounces as well. As long as they are healthy, growing, and have enough wet diapers then all is good.

My baby girl is 6 months tomorrow and weights 17lbs 8oz is that a good weight or is she to heavy she is 24 inches long

My baby is 17 pounds 24 inches long 5 months old also I think same thing she eats 5 oz bottles

My son is 7 months old and his weight is 17lb. His birth weight was 8lb and 13onces. I’m a little concert about his weight because every time we go at the doctors he says your baby is too little . I think my son is less than 10 percentile but he’s very active. He crawls on both sides a lot, he tries too reach and grabs on the things that he wants. He is very happy and moves a lot. The doctor said he needs to drink at least 40 oz of milk a day and my son drink 10 oz of milk and 16 oz of solids that I made them myself. He was breastfed till 6 months and than I started him in formula. I have tried 4 different formulas and finally I’m using one now. He doesn’t really like formula. I don’t know what to do. How to make him gain weight. Maybe he is like me, I’ve always been on petite side when I was young. My first son was born 9lb 12onces and he was always big. He’s like my husband.

Im having the same issue pretty much.. My daughter was 6lb 5oz when she was born and she weighs 10lb 12oz now at 6 months.. The doctor wants me to add formula to her milk, they say i dont feed her enough but this girl eats everything.. Shes really active and happy so i dont know if its just because shes going to be little like me or what.. Did you ever figure out how to get your little one to gain weight?

My son is 30 inches long and 26lb 8 ounces at 6 months. He sits on his own and is very aware and is starting to try to play on all fours. How normal is this?

I’m so glad you posted this. My son is almost 7 months old. He weighs 27 lbs and is 28 in long. He’s completely “normal” on milestones and is a healthy, happy baby!

My son just turned 6 months and is 30 inches long. He is 28 pounds and was sitting up at 5 months. He just started standing on his own. He wears 2t-3t pull-ups and wearing 18 months clothes.

My Son weighs 13,30g and 73.5 long at his six months is it normal?

My Son weighs 13,300g and 73.5 long at his six months is it normal? Should I stop breastfeeding him?

My exclusively breastfed boy was 5 lbs and 19.5 inches long at birth. He’s now 6 months old and is 28.5 inches long and 21 lbs, 5 oz. The doctor says he obviously very healthy!

Congratulations! Sounds like things are going very well.

My son is 6 months and 4 days. He weighs 31.5lbs and is 29 inches long. He has always been on the big side weighing 10lb at birth. Dr says he is healthy.

I have twin girls who were exclusively breastfed for 6 months. At 5 months 3 weeks, one weighed 10kg (22lbs) while the other weighed 7.5kg. At birth, they weighed 2.2 & 2.3kg. I don’t intend starving my child cos I know she’ll lose the weight when she starts walking.


My son – aged 6 months weighs 5.8kgs (almost 13pounds). He was on the healthier side till 3 months, but has fallen ill twice (cough and cold at 3.5 and again at 5.5 months) and during the period drank little milk (Breast fed exclusively till 5months) and not taking well to solids . Hence, he lost some weight and subsequently, weight gain has been low. Till his illness at 3 months he was sleeping well (9-10hours of sleep in the night – with only one feed in the middle and few naps in the daytime. Since his illness – hes been sleeping 8-10 hours in the night and gets up almost every hour or two (except the initial 3 hour) and naps 5-6 times during the day for 15-20 mins. I am concerned abt his slow growth – is it taking a toll on his sleep pattern as well and thereby being a fussy and cranky baby. My pediatrician says i shouldnt be worried and he will catch up later. Any views??

my baby is 6months and she is 6 kg and 65 cm long small baby but active….she is sucking for short time but doctor says she is going on her line so its good …she was born very small so i think its the way she is but i wish to see her put some more weight

my daughter is also 6 months and shes weighing 6 kg , she doesn’t want to eat , im so concerned and worried at the same time , but shes too healthy i never took her to the doctor ever since i gave birth to her, shes has now started crawling and she very happy. should i get worried .

My grand-daughter will be six months in 2 days…she only weighs 12.8 pounds. Should we be worried?

I think it depends more on how much they weighed at birth. My son was 5 pounds 15 ounces at birth and as of yesterday at his 6 month check up he is 13 pounds and 13 ounces.The doctor said he looked perfect though.

My 8 month old grand daughter weighs 27 pounds. I think she is a bit heavy.

My son is 6 mths n his weight is 22 pounds n I’m not going to starve him or do anything about it bcus wen they reach they walking stage they lose weight really fast

My daughter is 5 months going to be 6 months next week. She’s 18lbs 4oz she is 24inches. She’s sitting up and trying to crawl already, is she overweight? BTW her doctor didn’t say anything to me about her being overweight. Need answers please

Doesn’t sound overweight at all to me. My 6 month old is 21 lbs, 5oz and his doctor said he’s very healthy!

My six month old daughter weights 10 pounds and 10 ounces and is 23 inches long. She was 7 pounds and 20 1/2 inches long when she was born. She can sit up and roll over like every average baby but she is having trouble gaining weight…really worried.

My baby is almost 6 months old and she’s only 10 1/2 pounds and last I knew she was 23 1/2 inches long. Mine has also had trouble gaining weight. She has reflux. Does yours have reflux?

Same problem here. My daughter will be six months old in a week. She only weighs 10.5 lbs. She’s breastfeeding and active. So different from my other kids. I am also worried something might be wrong :(

Are you feeding your baby cereal and other stage one foods?

My son was 6 months 2 days ago. At his check up he weighed 22 lbs 13 oz and is 25 inches long. He wears 12-18 month clothes.

mM daughter is 6 months old. She weighs 19.3 and she’s 26 1/2 inches long. Her pediatrician said she’s over weight… Ss she over weight by a lot? I need answers please.

My grandson had reflux diagnosed at 5 weeks and was put on medicine (forgot name but very common) 3 times a day plus a Similac formula for “Spitting up”.
It has taken til 6 month old to go from 17% weight to now 50%. Wishing you well.

My daughter is 6 months and she weight 9 pounds and 7oz is that bad?

My son is three month old and weighs 10 pounds. He is tiny. Is that bad? Need answers…….

My baby is 6 months old , he weights 20.943 pounds. Height 25.196 inches. My doctor aid he needs to loose weight. Is it ideal or overweight??

Your baby doesn’t need to lose weight and don’t ever restrict feedings. My six month old son is 23 lbs, 27 in long and his Dr says he is very healthy. I’ve also been feeding him only breast milk since he’s been born.

my daughter age six month and her wight is 15 pounds height 27 inch plz advise natural food for her

my son was a preemie he weights almost 15lbs and I think its very low he was a 2.10oz baby im worry he hasn’t sit up and he will be 7 months this july 24th I need answers.

My son is six months and he weights 20.6 am
Concern about his weight

I have a question my daughter is 6month and I’m a little worried on her weight. She weights 13. 2oz . My dr. said she need to gain weight and below her weight. She is 25inch long . So my question is she okay. I been starting to feed her solid food like oatmeal and add my breast milk. Help!!!!!!!! :(

My son is 21 week and his waight is 6.6kg I’m worried of his waight so I have started giving him solid foods like bananas and dates
I don’t know what to do should I continue or there is new methods
Please help…
I’m in need of an answer

hi there
just give your baby breast milk and reduce the solids dont worry she will pick up weight