Ideal Body Weight Calculator

Do you know what your ideal body weight is for a person of your height, frame size, and gender?

Use this accurate body weight calculator to figure out what your ideal weight is.


Frame Size *


Your Ideal Weight Range



*Frame Size

To identify your frame size use a measuring tape and the height chart below.


Height under 5’2″

  • Small = wrist size less than 5.5″
  • Medium = wrist size 5.5″ to 5.75″
  • Large = wrist size over 5.75″

Height 5’2″ to 5′ 5″

  • Small = wrist size less than 6″
  • Medium = wrist size 6″ to 6.25″
  • Large = wrist size over 6.25″

Height over 5′ 5″

  • Small = wrist size less than 6.25″
  • Medium = wrist size 6.25″ to 6.5″
  • Large = wrist size over 6.5″


Height over 5′ 5″

  • Small = wrist size 5.5″ to 6.5″
  • Medium = wrist size 6.5″ to 7.5″
  • Large = wrist size over 7.5″


If you don’t have a measuring tape you can use this simple (less accurate method):

Grip your wrist using your thumb and longest finger.

  • If your finger and thumb don’t touch you are a LARGE frame.
  • If your finger and thumb just touch you are a MEDIUM frame.
  • If your finger and thumb overlap you are a SMALL frame.

Your Ideal Body Weight

Knowing your ideal body weight is a good first step to take before you start macro counting or flexible dieting. This helps you to have realistic expectations and to establish a healthy goal weight.

Understanding your optimal weight can help you with the following aspects of dieting:

  • Allows you to set realistic weight loss goals.
  • Prevents the thinking that weight loss is necessary when it isn’t.
  • Gives you a baseline to use for building muscle.
  • Helps with maintaining a healthy weight for your height.
  • Shows you a goal to strive for if you are underweight.

Why Frame Size is Important

Other ideal body weight calculators don’t factor for frame size and this is an important factor in determining an ideal body weight for a person of your height.

The term frame size refers to the mass of your skeletal structure. Those with more bone mass will weigh more than people with less bone mass who are of similar height. However, this isn’t factoring for bone density.


A 5’6″ woman who has a large frame size should weigh between 139-143 pounds, whereas a 5’6″ woman with a small frame should weigh 124-128.

This feature is why our ideal body weight calculator provides the most accurate results possible and paints a more realistic picture of what your ideal body weight should be.

How Optimal Body Weight is Calculated

Our calculator uses two well-respected formulas for determining ideal body weight. For women, the Robinson formula is used and for men, it uses the Devine formula. (see the references below)

While these formulas can’t account for all individual differences that may contribute to a person’s optimal weight, they do provide a good estimate of what’s ideal for a person of your height.

Taking This Further

Once you have determined a bodyweight that is in the ideal range for you personally, you can use that information to establish a body transformation goal that’s appropriate.

You can then use our TDEE and macro calculator to determine how much you need to eat in order to achieve that goal. This calculator uses the flexible dieting approach that doesn’t prohibit foods or certain ingredients but allows you to eat what you love as long as they fit your prescribed set of macros.


  • Robinson, J. D., Lupkiewicz, S. M., Palenik, L., Lopez, L. M., & Ariet, M. (1983). Determination of ideal body weight for drug dosage calculations. American Journal of Health-System Pharmacy, 40(6), 1016-1019. Link
  • McCarron, Margaret M., and Ben J. Devine. “Clinical Pharmacy: Case Studies: Case Number 25 Gentamicin Therapy.” Drug Intelligence & Clinical Pharmacy 8.11 (1974): 650-655. Study Link
  • Pai, M. P., & Paloucek, F. P. (2000). The origin of the “ideal” body weight equations. Annals of Pharmacotherapy, 34(9), 1066-1069. Study Link
Last Updated: October 4, 2019


  1. Jerry 9 months ago

    Can’t get it to take my height

    • Ted Kallmyer 9 months ago

      Are converting your height to inches? 5’9″ would be 69 inches.

  2. Aline Roy 9 months ago

    I guess I just need to ton and not lose weight. I’m under what my ideal weight is suppose to be. I’m just very flabby.

  3. Michelle Lopez 9 months ago

    I’m 5’ 7” 182 lbs. and I’m 57 yrs old please tell me what my calories need to be etc.

  4. teresa 9 months ago

    This calculation is wrong. I am a 6’3″ tall woman, athletic. I weigh about 175 and I’m quite medium to thin in appearance. My waist is well below half my height, and I don’t have much visceral fat. 22 percent BMI, small frame by wrist and elbow measurements. If I did weigh 154-158 by this calculator, which this site says is ideal, I would be in trouble. I could weight 165 and be good, but not less. When I weigh 165, I look pretty gaunt in photos.

  5. Esther Ekomaru 10 months ago

    I have bad news about 16/8 store and I need loose weight how only my tummy and small not fat worse how I need loose 10 store and because I am diabetes 2 and I was try health diet I was worry about weight loose futures and I try like want baby

  6. Ashley M de Sa 11 months ago

    Why is there such a difference in how much you recommend a woman vs. a man to weigh, yes a man generally weighs more than a woman but that’s due more so to the fact that men tend to be taller than women on average and less so the fact that the sexes differ in weight, which they do, but not that dramatically at the same height, the difference I saw was 100lbs just by changing the sex, I would expect a 10-20lb difference, but not about 100lbs.

    • Ted Kallmyer 11 months ago

      Men typically carry more muscle mass than women but 100 pounds does seem strange. Can you share the stats you entered and found that? Thanks

  7. Mel Zill 11 months ago

    This body weight calculator gives very low weights, and would be fine for a young teenager. However, if you are over the age of 35 it would be far too low a weight, and if you are a senior, you would have to add 30-40 pounds for a healthy weight.

  8. Matthew 11 months ago

    Hello, I have been trying to find out what my little brother should way and I gind this test to be absolute bs, I don’t think a 51″ male should weigh more than a 66″ male, also, if anyone that’s 9 years old happens to be the “recommended” 218 pounds, I’m sorry, but they’re going to die of a heart attack by their teen years.

    • Ted Kallmyer 11 months ago

      Hi Matthew, This calculator isn’t suitable for children. It is the ideal weight of adults since the formula used doesn’t work for those under an adult height. This calculator works for children:

  9. AnalogDog 12 months ago

    Yup, yup…like the man says. It doesn’t account for muscle mass! To wit: I’ve gotten down to what I weighed when I was 30…only it sure doesn’t LOOK the same! I’ve still got this little fat pad around my umbilicus that is most recalcitrant. In addition, it’s obvious I’ve lost a LOT of muscle in my chest and arms. Ravages of aging. Guess I’ll have to do more weight training, but its a losing battle.

  10. Sloan Martelli 12 months ago

    I do enjoy

  11. Judith

    Hi…Just trying to figure out my calorie intake and my micros to lose weight.please help if u can…I am 5ft 1inc, turning 34 this November and 229 pounds today…above 45% of fat….too obese(ashamed to even write) but I am here for help..

    • Ted Kallmyer

      Hi Judith, Thanks for visiting and asking for help is a great first step. You could use our calculator to get you started but because you have more than 50 pounds to lose, there are some additional calculations needed to adjust for this. I’d be happy to calculate everything for you and support you along the way. See if one of my coaching options here seems like something you would want to do.

  12. Carla

    Lol.. Agree

  13. Sheera

    I’m a female age 33 at 5ft 2in 78lbs,31 23 32bwh.I feel normal.

    • Carla

      You are clearly underweight ! I am 5’2″ .. 118 pounds …. I want to gain weight

    • Ashley M de Sa 11 months ago

      78 lbs??? And you dont feel like sticks and bones??I’m 4 inches shorter than you and I weigh 124lbs (couple lbs overweight but I also have more muscles than the average woman), that’s about 45 lbs heavier than you and I feel thin, in fact I fit in smalls, I can’t imagine being 45 lbs lighter and not be slowly dying. I would get a docs opinion, but that doesn’t sound like a good weight at all even if you’re in your 80s (because as you age you lose muscle mass and bone density so your ideal weight gets lower as you age).

    • Christa 10 months ago

      I’m around the same age/height/weight. My mom didn’t break 100lbs until she got pregnant with my brother! I would still get a doc’s opinion though, just in case. <3

  14. Kayla Smith

    I disagree with this. I have a large frame naturally, and I have a lot of muscles. Me being 5’6 and see to be 143 is stupid. In think I should be 150. That sounds more reasonable for my body type and muscles. I excersize at least 2hrs a day…

    • Ted Kallmyer

      These numbers represent the ideal weight for the average man or woman at a certain height. There are always outliers that are still healthy but are above or below the recommendations.

  15. Coco

    Even if these are the supposed overall ideal body weights, how does this account for muscle mass as someone of a small frame can have multiple pounds of muscle mass above their ideal weight and still look and be perfectly healthy?

    • Ted Kallmyer

      It doesn’t. This is representative of an “average” person. People with more muscle mass than average should expect their ideal weight to be a little higher.

  16. Brianna Williams

    I’m a 21 year old female who 5’0 and small framed yet flucates from 130-138. I’m supposed to be between 103-107 according to my results yet on other BMI sites it says that 97-128 is fine. I just want to know where is the point where I would tread being underweight?

    • Melissa M.

      With a small frame 97 should be your absolute lowest as an adult woman – but really, just pay attention and find where you like your body best. I’m 4’10.5″ and on a high end of a small frame, but if my weight dips below 107, I look sickly. But I have a friend who is my same height and she looks fine at 100lbs.

  17. Jeffrey

    I am a 5′ 6″ male and about 4 months ago I set a goal to weigh 145 lb. I had no reason for selecting that weight other than it seemed achievable and I remember feeling healthy when I was that weight. I always thought of myself as small framed but both test from this website make me Medium. My calculations put me at 142-146 lb which helps me to be sure that is a good weight for my current shape.

  18. Dickie van Toulon

    On two different web sites I get following two different answers for ‘ideal weight’ for my frame (large) and length (183 cm): 1) 87 kg (190-194 pounds). 2) 78 kg (171 pounds). Difference is rather big. Which one is ‘right’ ? At age 19, my weight was 83 kg, I had nil overweight (playing two competitive field hockey matches on Sat & Sun, two physical training sessions each week (1 1/2 hour each) plus at school 2 hours physical excercise per week. I guess I don’t have to worry (my dob is Nov 1951) ?

  19. Amanda

    This is so confusing to me

  20. G. H.

    I am 5 feet 3.5 inches, age 51, female.
    My wrist measures 5.75 inches, which would put me in the small frame category for that height (I’m female), but when I do the alternate (obviously less accurate) thumb/forefinger measurement, they barely touch each other, which would put me in the medium frame category.
    I think I probably have unusually slender wrists in comparison with the rest of my frame, because my knees (bone part) and ankles (bone part) are not slender and I would say they were in the medium category.
    My feet also are of a normal width, not narrow (though I don’t know if that comes into the determination about frame size).
    By putting into your calculator here the height of 5’3.5″ and medium frame, I get a target weight of 117-123. By putting in small frame, I get a target weight of 113-117.
    I do think these ranges are too low, and veering towards unhealthy.
    I weigh 128, which is, in itself, pretty atypical for a 51-year-old woman living in the middle of the US.
    In terms of BMI, which I realize is a flawed system for some body shapes, at 128 pounds, I fall comfortably in the middle of the target BMI range (BMI of 22.3).
    The clothes that fit me now are size 4. At my weight, it is hard enough for me to find a decent selection of size 4 clothes in my region of the country – if I only weighed between 113-117, I wouldn’t even be able to find clothes that fit me… maybe a few stores carry size 0, but not in my middle-of-the-road, middle-America town….
    The Wikipedia entry for BMI (body mass index) has an interesting chart that shows that I am in the 15th percentile for American women my age, so about 85% of women in my age group of 50-59 have a BMI higher than mine.
    Further, in the row in the chart that includes ALL American women over the age of 20, it says that about 80% of them have a higher BMI than I do.
    Your small-frame lower target of 113 pounds for a woman of my height and wrist measurement would translate into a BMI of 19.7, and the chart I am referring to shows that less than 5% of American women over the age of 20 have a BMI of that much (or lower). Just FIVE percent… And your small frame upper target of 117 pounds for a woman of these statistics means a BMI of 20.4, which it looks like only about 7 to 8% of all American women over the age of 20 would meet. Therefore, your target weight range here (for people of my description) is expecting people to be pretty abnormal (for our society), and might encourage some to take desperate and unhealthy approaches in order to try to fit into your prescribed range.
    In other words, your target weight for people with my statistics says that being a “size zero” is the aim. Surely that is a little too rigid.
    When I’m at 123 pounds, that’s when I feel and look the best, and even your *medium* frame targets for a woman of my size (117-123) seem a tiny bit too low for me.
    So, for women of a small to medium frame at 5’3.5″, with a good bit of muscle and who have a healthy but reasonably-moderate food intake, especially those who are over 45, I think that your ideal weight target is too low.
    [Being menopausal and post-menopausal adds some weight to a middle-aged woman generally (which is not unhealthful, if otherwise her lifestyle is generally healthy).]
    Maybe you could add a few other inch measurements from other parts of the body, plus consider age, and maybe even factor in the person’s approximate body shape, into your calculations?
    Maybe you could address why you are recommending that women (those with my height and frame, anyway) should weigh so little that they actually have a body mass index lower than 92% of all adult American women do, and would take an unusually small size in clothing. Is that genuinely “ideal”?

    • lol

      How can someone write so long?

      • Robin

        I suppose if you have something relevant to say, that would account for a lengthy comment! I like everything that G.H. said.

      • Tiddles

        Her name is quite appropriate G.H. >>> Got Headache (from reading long winded comment)

      • Carla

        Lol.. Agree

    • James

      As referenced in the article, the weights are derived from ideal body weight calculations used for determining drug dosage levels. The data is from the pharmacy industry and from the 1980s. I guess it shows how our perceptions of ‘normal’ weight have changed over the last 30-40 years.

      • Timothy Koen

        The data looks to me like it is from the ‘Met Life’ study of 1973 conducted by the University of Michigan and was used to determine body mass index not drug dosage. UofM is one of the U.S. leading teaching universities. And that is the real reason the data is considered accurate by most health professions, not just the pharamacy industry.

    • Robin

      I like your questions! And I have the same ones. This calculator is inaccurate, to say the least! It makes no allowance for a woman’s age, which matters a great deal as we age.

    • Marileemed

      For me, this calculator is spot on. I’m an MD and the BMI scale has been adjusted up over time. If I go with my highest allowable BMI I would look and feel very overweight. I hear so many excuses out there as to why these formulas don’t work… “I have big bones, etc”, but honestly you can’t and shouldn’t compare yourself to the average American these days. At 125 my BMI is 21.5. I am still normal at 145? Really? This measures my ideal weight at right around 120, which, if I am honest with myself, would look and feel better on me. (And I am between frame sizes as well) Dieting sucks, I get it, but in the end you should be looking at no one else’s health but your own.

      • Nurf Bear

        Exactly. 3/4ths of Americans are overweight. If you judge yourself by an average of your peers you’re probably going to overestimate your “normal” body weight. This is exactly why we can’t judge health by what is “normal”. Society at large is unhealthy and saying you’re as healthy as the rest of society doesn’t at all mean you’re healthy.

        The only real problem with nuemerical calculations like this and the height/weight BMI is that it doesn’t account for muscle mass.

      • Jenna clarke

        Calculations are spot on for me as well, my body in shape looks and feels best at 122-124… calculator said 122-126. Couldn’t be any more accurate. First scale to allow for frame size, BMI and height based charts have an acceptable range that is too wide. Love this!

        • AWil

          Yeah none of these are ever accurate for me because im 5’9′ with a large frame and it wants me to weigh like 142-145. I look sick at 158! If i lost weight down to where all of these BMI calculators and Ideal weight calculators tell me to be I would be a sickly skinny person.

        • Staar L

          I agree, it fits me well as well, this is a generalization of the majority sizes. Though some people seem to not understand because they are not reading it carefully. Or they are new to everything (which I am not and I train people currently training my first big person) which there is a range of a guideline here but no two bodies are the same so they may be exception of change and wider range. This is for younger ages than 50 obviously and at age 50 it’s totally different. Anyways just wanted to agree with you 😉

    • Julie Meda

      The size charts have changed over the years to accommodate the increased in people’s weight. This is not a healthy change just manufactures wanting the ego of people buying the clothes to think they are a smaller size than they actually are. Check out the sizes from 1980s that is more like what people should measure. Look around you, people are definitely larger than ever before. We should never increase the weight recommendations based on how many people are above a certain percentile. It just proves how obese the USA has become. I for one don’t want to join that statistic!

    • Tc 3 weeks ago

      I can understand your frustration with this chart. According to this chart I have a snack bone structure but I am 5 fit 6 inches, 41 y/o. I weigh 109 pounds, no eating disorders or diseases (genetics are fun for me). I am clearly underweight. This chart doesn’t think so, EVERY other one does. Every doctor I’ve ever had does. You can count all my ribs and vertebrae from across the room. I can knock on my hip bones and get people to answer the door. You can pick me up by my collar bones. Sound sexy to anyone that isn’t sick in the head? Sorry, bad humor…
      You want to know what you should weigh? It’s going to be a conviction of about a 100 years of your genetics and listening to the person that has the most invested in your health, your doctor. You sure aren’t going to recommend your friends to him /her if they encourage you to be unhealthy just to get your money and you’re no good to them dead if a heart attack.