Height Calculator: How Tall Will I Be? 107

How tall will I be?

Height Calculator

By inheriting genes from both parents, a child usually grows to their average height. However, the activity of genes can vary, and so too can growth. And beyond genes, there are environmental factors like wellness, activity, and nutrition. Height calculators can’t possibly take all of this into consideration to answer the question, “How tall will I be?” Instead they really only apply to statistical averages. Nevertheless, it can be interesting to try them out.

Below the height prediction is some other interesting predictions relating to percentiles, weight lifting ability, and speed.

This height calculator takes the specified adult height and weight and calculates statistical characteristics. It is not an exact analysis for any given individual. All predictions are relative to a person of average height and weight unless indicated otherwise by a *. For more information, click on the various section titles.

Height Calculator Inputs

Units: Imperial Metric
Gender: Male Female
Mother’s Height:
Father’s Height:

Calculated Height
at Various Ages

Height at Age 1:
Height at Age 2:
Height at Age 3:
Height at Age 4:
Height at Age 5:
Height at Age 6:
Height at Age 7:
Height at Age 8:
Height at Age 9:
Height at Age 10:
Height at Age 11:
Height at Age 12:
Height at Age 13:
Height at Age 14:
Height at Age 15:
Height at Age 16:
Height at Age 17:
Height at Age 18:
Height at Age 19:
Height at Age 20:

The following additional analysis is for characteristics of an adult of the predicted height and weight above. Please note that the results are predictions for a statistical average and do not apply to anyone in particular. All predictions are relative to a person of average height and weight unless indicated otherwise by a *. For more information, click on the various section titles.

Height Percentile Calculator

Height Category:
Height Percentile:
SDs From Average:
1 in ? are Taller:
1 in ? are Shorter:

BMI and Better BMI VS
Height Calculator

Better BMI:

Ideal Weight VS
Height Calculator

Hawi Method:
Devine Method:
Robinson Method:
Miller Method:
BMI Method:
Better BMI Method:

Injury and Disease VS Height Calculator

Venous thromboembolism:
Back pain*:

Income VS
Height Calculator


Intelligence VS
Height Calculator

IQ points:

Reflexes VS
Height Calculator

Reaction Time :

Weightlifting Ability VS
Height Calculator

Body Weight Exercises:
Gym Weight Exercises:
Curl Machine Exercises:
Obstacle Exercises:

Height Calculation Methods

Mid Parental Height Calculation

The simplest height calculator draws on the fact that children inherit genes from both parents. It takes the average height of the parents and add 2.5 inches (6.5cm) for boys or subtract 2.5 inches for girls. But if the child’s height trajectory points to a greater height, don’t go hunting down the mailman just yet; with so many genes involved, some of which may be recessive, and the possibility of environmental influences, child height can differ considerably from parental height.

Calculate by Doubling Height at Age Two

Another popular approach to predicting adult height is to double a boy’s height at age 2 or a girl’s height at age 18 months. While this approach does incorporate the child’s own height, and thus their own genetics, it is over simplified and unlikely to provide an accurate prediction.

Khamis-Roche Height Calculation

The Khamis-Roche Method1 combines the best of both of the above methods by looking at both parental height and the child’s height at the current age. Furthermore, it incorporates weight as this too is telling of growth to come. This is the method used by the height calculator at the beginning of this article.

Bone Age Height Calculators

More advanced height calculators make use of bone age, which is a measure of age based on the size and shape of the bones as seen in radiographs, and formulas such as those found in the Tanner-Whitehouse method. Bone age isn’t always available, and it was actually for this reason that the Khamis-Roche method was developed.

Calculate Height From Height Percentile

Another method is to calculate height percentile and then check that same height percentile for adults. Similarly, there are also growth charts for analyzing height, but that’s a topic for another article.

Height Calculation Methods Summary

While a height calculator may be useful, it is not intended for cases where an underlying height related disorder or syndrome may be present. Additionally, these methods have generally been developed for white American children and thus some prediction accuracy may be lost for other populations. In actuality, a pediatrician or endocrinologist is the best resource when it comes to understanding a child’s height. For further reading, you might check out some of the books below.

[1] Predicting adult stature without using skeletal age: the Khamis-Roche method.

How Tall will I be at a Certain Age?

One way to get an estimate of how tall you will be at a certain age is to use growth charts. Note though that growth happens irregularly, and so predictions can be off. The calculated height at various ages in the results section is based off of CDC growth charts. It is just adjusted to the height prediction method selected.

107 thoughts on “Height Calculator: How Tall Will I Be?

  • Michael

    My son has just reached his 13th birthday and he is 5’10 (an inch taller than me) His mum is only 5’3. I have no idea what final height he will reach. You’re calculator indicated 6’4. If this is the case he is only due to grow 1.2 inches a year over the next 5 years?

  • Anonymous

    Oh wow reading these comments make me feel fat im 16yrs old im 6ft gonna be6ft3 but im 220pounds im not fat though maybe its just my familys genes we are naturally big my cousins 6ft6 and his parents my auntie and uncle are 6ftmale and 5ft8female so maybe ill be taller and no longer feel fat through these comments

    • Erin

      Hi. May I say that is a more than healthy weight for your height?
      I’m 6’3″,Male, 17, and 118 pounds and Somedays I feel like I should be waving in front of a car dealership.

      Honestly, I wish I could be bulkier, so please be proud of your wight, that I envy to obtain.
      looking at your mindset, I could go as far to say that’s an eating disorder attitude…. I’ve struggled with bulimia before and you need to know that being too thin is unhealthy just as much as being 300 pounds is.
      You are at a healthy wieght, and for your age, you’d probably grow more, and if you ever feel like being completely restricive with your diet, don’t. You should focus on being a healthy eater.
      If you are getting your daily values of everything, there is nothing for you to worry about weight-wise.
      Genes are a factor, for determining your metabolism, and a slight factor in weight, but as long as you make the right desisions, you could “resist” your predetermined genetics, and get to a weight you feel comfortable with.
      I wouldn’t recommend that you lose too much weight, but if you feel as is it is nessesary, then don’t listen to me. Just make sure you stay safe.

      Cheers, Erin.

  • Colton

    Will I grow more I’m kinda worried I put in the correct stats and it said that I would be 6ft but I have not grown for the past 5 months I’m gonna be 15 in a month so do you think I will grow more and I did use the 1st one

  • Alex

    I turned 13 years old on 10th August. I am now 5’3″ . I grew around 8 inches in the past 2 years. Lately I have only grown 3 cm in 6 months. My mom is 5’4″ and my dad is 5’7″. I want to know whether I will be as tall as my dad.

  • Gaurav

    Nice…I m 16 years old and I m 6’2 . According to this calculator I will 6’2.5 (First calculator),according to second calculator I will 5’10 which is my elder brother’s height.

  • Weirdsnakeu

    I’m 14 5’6.5 and it says I’ll be 5’10.8 I’m also a female so could I have a chance at being that tall?

  • Serafino Diaz-Mazzei

    Test results yielded different results. When I put in 5’8″ when I was 12, it said 6’3″. But now that I put 5’9″ at age 13, it says 6’2″ 1/2. I think I will be much taller than the predicted result because at the rate I’m growing, I could end up at 6’0″ by the time I am a high schooler. The doctor said I would be in between 6’1″ and 6’6″, but my mom doesn’t want me to grow past 6’5″. This other chart said I would be 6’10”. But, I know that I should be happy with the height I get!

  • Mahan

    It was so interesting and great (funny though). My father is 189cm and my mom is 165cm I’m 14.5 and 183.5cm this say I will 194cm. I think myself first calculator is more accurate than second because it says I’ll be 183.3 which I passed that, by the way I’ll be tall because shortest brother of my father is 180cm and tallest is 193cm and my mother’s brother is 187cm both my grandfathers is 183 so I think I’ll be more taller than 194cm. It’s really depends on genes and sports activities. I read somewhere some sports like basketball,volleyball,swiming and etc will increase your height 7cm but I’m not sure about that.

  • Anonymous

    The first method is very accurate! I’ve used that to gauge my kids growth in the last few years and it’s on pointe for our kiddos. They are 15 and 13, late bloomers, but tracking their current height and weight in conjunction with parental stats produces very accurate results. Only inputting parental stats is very inaccurate! My kids already surpass the predicted height based on just parental height. In our case, I’m petite and my husband is tall. The kids are NOT an average of us. They inherited their fstjer’s height. It could have gone either way. That is why it’s important to gauge their current growth pattern and percentiles. Additionally, baby measurements are not a good predictor because of varying growth rates. My babies were tiny! Now, my 13 year old is in the 97th percentile. So, gauging them between 10-15 is probably the most accurate. HTH!

  • Anonymous

    Put it like this: You know how a long- term forecast is not accurate? Well, that’s because it predicts 3 days ahead. Short- term calculators predict the weather a day ahead. Which tends to be more accurate than the other forecast.If the calculator predicts you at 6’9, you will be a little shorter than that. If it predicts you at 5’10 you’ll probably be around there. Another reason why you might not end up at that height is because of your age. Let’s say I’m 11 and 8 months. The calculator says I’m going to be 5’11, that’s probably off by a little. This is because the further away your age is at from the point where you stop growing, it will be off by a a couple inches. You’d probably minus or add a few inches though. For instance, if I have a balanced, consumed diet, then I would add an inch or two to my predicted adult height. If I’m very active, then I would add another couple inches to my height. Combined, I wouLd be very tall. If I was active, but did not have a good diet, then I would just add a couple inches only to my predicted adult height. If I’m weeek on both, you lose the argument.

  • Anonymous

    wow! So i am 14 in a half and i would love to be a Victoria’s Secret model. There is a required height {min: 5’7} to be qualified to be one. Right not i am 5’6. and the height that i am going to be as an adult is about 5′ 9.2. Which is pretty tall.

  • Anonymous

    I am 14 and 4 months and i am 5’9.5-5’10 which is pretty tall from what i heard. my younger brother who just turned 13 is 5’10.5. so he is taller than me and is supposed to be 6’0 by the end of the year. most people would be jealous but i am happy i have a tall bro to back me up. The calculator predicted him to be 6’6-6’7 by the end of his growth and for me it was 6’3-6’4 which is as accurate as can be, because my doctor predicted the same height last year when we went for a checkup. Me and my brother are extremely happy. My mom is 5-9 to 5’10 which is giant for a woman and my dad is 5’11 which is average. i was told the only reason why we will be tall is because our grandpa is 6’7-6’8 and we both play basketball. So NBA here we come. All my dad’s siblings are taller than 6 feet including the women and my my mom’s father is 6’2 and her mom was 5-10 so again pretty tall.

  • Anonymous

    Wow. This makes me feel better. I’m 12 and 5ft right now. So I was kinda scared that I was going to be short like my dad.he’s 5’5 and my mom’s 5’10. And 5’10 was my result plus I’m very active with a good diet too. So this makes me feel a bit better.

  • Anonymous

    Interesting. The first one predicted me to be 6ft 2in (6ft 1.7in) but the second one predicted me to be 6ft 0in (5ft 11.6). What is that 2 inch difference for? I’m guessing my height will be 6ft 1in if you round them to their median. Anyway, 6ft 1in sounds like a good height (I’m a boy)

  • Liam

    I am 14 yrs old, 190 lbs, and I am 6’3″. This calculator says I will be 6’6″ and I’m glad because I play volleyball and like to block and spike a lot.

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