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 friendly calculator to figure out what your optimal weight is.

Gender

Frame Size *

Height

Your Ideal Weight Range

POUNDS

KG

*Frame Size

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

Women

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″

Men:

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″

Source: https://medlineplus.gov

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.


Example:

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 body weight 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.

    References

  • 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

9 Comments

  1. Amanda 2 weeks ago

    This is so confusing to me

    Reply
  2. G. H. 2 months ago

    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”?

    Reply
    • lol 2 months ago

      How can someone write so long?

      Reply
      • Robin 1 month ago

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

        Reply
    • James 2 months ago

      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.

      Reply
    • Robin 1 month ago

      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.

      Reply
    • Marileemed 1 month ago

      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.

      Reply
      • Nurf Bear 2 weeks ago

        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.

        Reply
      • Jenna clarke 4 days ago

        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!

        Reply