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.
Ashley

How Much Should a 6-Month Old Weigh?

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.

Dr. Alan Greene

Dr. Greene is the founder of DrGreene.com (cited by the AMA as “the pioneer physician Web site”), a practicing pediatrician, father of four, & author of Raising Baby Green & Feeding Baby Green. He appears frequently in the media including such venues as the The New York Times, the TODAY Show, Good Morning America, & the Dr. Oz Show.

  1. ursula

    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

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  2. Lsley

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

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    • Brandi

      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.

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  3. Kate

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

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  4. Shivan

    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

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  5. Jojo ju

    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

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  6. Felicia Santana

    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.

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    • TT

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

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    • alana

      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 :(

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    • Brittany

      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?

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  7. Ashley

    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.

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  8. brenda

    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.

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    • Nates Grandma

      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.

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  9. Kiarra

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

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  10. Kadian Smith

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

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  11. Adam

    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??

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    • Ginger

      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.

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  12. muhammad rafiq

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

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  13. carolinha

    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.

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  14. Lucy

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

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  15. Josie Valdez

    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!!!!!!!! :(

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