Determine whether your child's height and weight meets WHO age standards
The child height and weight calculator helps parents assess whether their child’s development meets the World Health Organization (WHO) age standards.
The calculator is based on WHO growth standards, developed using data from thousands of healthy children from different countries. It calculates height and weight percentiles, which show how your child compares to other children of the same age and gender. Percentiles help doctors and parents evaluate a child's physical development.
Let's look at practical examples of assessing the physical development of children of different ages:
Boy, 6 months, height 68 cm, weight 8.5 kg
Входные данные:
Gender: boy, Age: 6 months, Height: 68 cm, Weight: 8.5 kgРасчёт:
Calculation of percentiles according to WHO standards for boys 6 monthsРезультат:
Height: 50th percentile (average), Weight: 75th percentile (above average)
Категория:
Height: normal (25-75%), Weight: above average (75-95%)
Рекомендация:
The child is developing normally. The weight is slightly above average, which may be a variant of the norm with proportional development.
Girl, 12 months, height 75 cm, weight 9.8 kg
Входные данные:
Gender: girl, Age: 12 months, Height: 75 cm, Weight: 9.8 kgРасчёт:
Calculation of percentiles according to WHO standards for girls 12 monthsРезультат:
Height: 45th percentile (average), Weight: 50th percentile (average)
Категория:
Height: normal (25-75%), Weight: normal (25-75%)
Рекомендация:
Perfect compliance with WHO standards. The child develops harmoniously, height and weight are proportional.
Boy, 24 months, height 88 cm, weight 12.5 kg
Входные данные:
Gender: boy, Age: 24 months, Height: 88 cm, Weight: 12.5 kgРасчёт:
Calculation of percentiles according to WHO standards for boys 24 monthsРезультат:
Height: 60th percentile (average), Weight: 55th percentile (average)
Категория:
Height: normal (25-75%), Weight: normal (25-75%)
Рекомендация:
Indicators are within normal limits. The child develops according to WHO age standards.
Girl, 36 months, height 95 cm, weight 14.2 kg
Входные данные:
Gender: girl, Age: 36 months, Height: 95 cm, Weight: 14.2 kgРасчёт:
Calculation of percentiles according to WHO standards for girls 36 monthsРезультат:
Height: 70th percentile (above average), Weight: 65th percentile (average)
Категория:
Height: above average (75-95%), Weight: normal (25-75%)
Рекомендация:
Above average height with normal weight is an indicator of good physical development. The child is tall, but the weight corresponds to his height.
Boy, 48 months, height 100 cm, weight 16.5 kg
Входные данные:
Gender: boy, Age: 48 months, Height: 100 cm, Weight: 16.5 kgРасчёт:
Calculation of percentiles according to WHO standards for boys 48 monthsРезультат:
Height: 40th percentile (average), Weight: 45th percentile (average)
Категория:
Height: normal (25-75%), Weight: normal (25-75%)
Рекомендация:
All indicators are within normal limits. The child develops according to age standards, height and weight are harmonious.
Girl, 60 months, height 110 cm, weight 18.8 kg
Входные данные:
Gender: girl, Age: 60 months, Height: 110 cm, Weight: 18.8 kgРасчёт:
Calculation of percentiles according to WHO standards for girls 60 months (upper limit)Результат:
Height: 80th percentile (above average), Weight: 75th percentile (above average)
Категория:
Height: above average (75-95%), Weight: above average (75-95%)
Рекомендация:
The indicators are above average, but proportional to each other. The child is larger than his peers, which is normal for harmonious development.
The World Health Organization has developed international child growth standards based on data from healthy children from around the world.
Universal standards based on the healthy development of children from different cultures and regions.
The standards are based on studies of thousands of healthy children and are updated regularly.
Percentiles show how your child's height and weight compare to other children of the same age and gender.
| Percentile | Category | Description |
|---|---|---|
| < 5% | Below normal | Possible developmental delay |
| 5-25% | Below average | Minor deviation |
| 25-75% | Within normal limits | Indicators are normal |
| 75-95% | Above average | Development faster than peers |
| > 95% | Above normal | Deviations are possible |
To obtain accurate results, it is important to correctly measure the child’s height and weight.
Measure height in the morning when the child has slept and is relaxed.
Weigh the child on an empty stomach, naked or wearing minimal clothing.
The calculator is intended for informational purposes and does not replace consultation with a pediatrician.
If you have any doubts about your child's development, be sure to consult a pediatrician.
Enter your child's gender, age, height and weight into the height and weight calculator. The system will automatically determine percentiles according to WHO standards and assess compliance with development standards. The calculator will show what percentile your child's performance is in: below normal (<5%), below average (5-25%), normal (25-75%), above average (75-95%) or above normal (>95%).
Height and weight percentiles are statistics that show what percentage of children of the same age and gender are shorter in height or weight than your child. For example, if a child's height is at the 50th percentile, this means that 50% of children of the same age and gender are shorter and 50% are taller. Percentiles help assess physical development relative to peers.
WHO (World Health Organization) growth standards are used because they are based on data from healthy children around the world and take into account optimal development during breastfeeding. These standards are universal and recognized by the international medical community as the most accurate for assessing the physical development of children from 0 to 5 years old. WHO standards are regularly updated based on modern research.
Boys and girls have different rates of growth and development due to biological differences. Boys are usually taller and heavier than girls of the same age, especially after the first year of life. WHO has developed separate growth standards for boys and girls that take these gender differences into account. When calculating, it is important to choose the correct sex of the child to obtain accurate results.
To accurately measure a child's height, use a stadiometer (baby stadiometer) in the morning, when the child has slept and is relaxed. The child should stand straight, bare feet, heels together, back straight. The head should be in a neutral position (line of sight parallel to the floor). Measure from the top of your head to your soles. For children under 2 years old, measure height while lying down (body length). Enter the result in centimeters into the height calculator.
To accurately weigh your child, use a baby scale (electronic or mechanical). Weigh the child on an empty stomach, in the morning, after using the toilet, without clothes or in minimal light clothing (subtract the weight of clothing). For babies, use special baby scales with an accuracy of 10-50 grams. Enter your weight in kilograms into the baby weight calculator. Regular weighing allows you to track your weight gain.
If a child's height is below the 5th percentile, it means that less than 5% of children of the same age and gender are shorter than your child. This may indicate possible growth retardation and requires consultation with a pediatrician or endocrinologist. The reasons may be different: genetic factors, diseases, poor diet, hormonal disorders. It is important not to panic, but to see a doctor for a full examination.
If a child's weight is above the 95th percentile, it means that more than 95% of children of the same age and gender weigh less. This may indicate excess weight, especially if combined with low physical activity. Talk to your pediatrician about diet and physical activity. It is important to assess whether the weight is proportional to height - perhaps the child is simply large, which is a variant of the norm.
It is recommended to measure the child's height and weight regularly: for infants up to one year old - monthly, for children 1-3 years old - every 3-6 months, for children 3-5 years old - every 6-12 months. Regular monitoring allows you to track the dynamics of physical development and identify deviations in time. Use the height and weight calculator to assess your WHO standards after each measurement.
The height calculator is designed for children from 0 to 5 years old according to WHO standards. For children over 5 years of age, different growth standards (CDC standards or national guidelines) are used. WHO standards for up to 5 years are considered the most accurate for early childhood. For children 5-18 years old, there are separate calculators and growth tables that take into account puberty and other developmental features.
Normal child growth at 1 year (12 months) according to WHO standards: for boys - approximately 75-77 cm (median 76 cm), for girls - approximately 74-75 cm (median 75 cm). However, normal ranges from the 50th percentile (median) ± 10 cm. Height between the 25th and 75th percentile is considered normal. Use the height calculator by entering your 12 month age, height and weight to get an accurate percentile estimate.
Body mass index (BMI) for a child is calculated using the same formula as for adults: BMI = weight (kg) / height² (m²). However, the interpretation of BMI for children is different - special percentile tables are used by age and gender. The height and weight calculator automatically estimates weight for height, which is more accurate than BMI for young children.
Tracking height percentiles over time is important because it allows you to assess the dynamics of physical development. If your height percentile drops or rises sharply, it may indicate health problems. A stable percentile (even if it is below or above the average) is often a variant of the norm. A sharp change in percentile requires consultation with a doctor. A percentile growth graph helps visualize development dynamics.
The WHO Child Growth Chart is a graphical representation of WHO growth standards as percentile curves (3rd, 5th, 10th, 25th, 50th, 75th, 90th, 95th, 97th percentiles) for boys and girls separately. The tables show the relationship between height and weight and age. The height calculator automatically determines where your child falls on the percentile curve using data from these charts.
The height calculator results show height and weight percentiles. Interpretation: <5% - below normal (possible delay), 5-25% - below average (minor deviation), 25-75% - normal (most children), 75-95% - above average (rapid development), >95% - above normal (deviations possible). It is important to evaluate height and weight together: if both measures are proportional, this is usually normal, even if they deviate from the median.
Yes, adjusted growth standards are used for premature babies. The calculation is based on the corrected age (chronological age minus the number of weeks of prematurity). For example, if a baby is 6 months old but was born 2 months early, the corrected age is 4 months. The growth calculator for prematurity should take into account the corrected age up to 2-3 years. After this, the difference usually disappears and the standard age can be used.
Yes, nutrition significantly affects a child’s height and weight. Inadequate or malnutrition can lead to stunting in height and weight (low percentiles). Excessive nutrition, especially high-calorie nutrition, can lead to excess weight (high weight percentiles). Breastfeeding up to 6 months and proper introduction of complementary foods are important for normal physical development. The growth calculator helps you assess whether your current diet is appropriate for development.
Yes, the height calculator can be used for newborns (from 0 months). However, measurements of newborns require special accuracy: height is measured in a lying position (body length), weight - on special children's scales. Growth standards for newborns differ from older children and take into account birth weight, gestational age, and gender. The calculator shows WHO norms for babies from birth, but interpretation of the results requires consultation with a neonatologist or pediatrician.
The dentile growth corridor is the percentile range within which a child's height must remain for normal development. Typically this is a range between the 25th and 75th percentile or between the 10th and 90th percentile. If a child's height extends beyond its dental corridor (the percentile changes sharply), this may indicate health problems. Percentile stability is more important than absolute growth values.
The height of the parents (genetic factors) significantly influences the height of the child. There is a formula for predicting final height: for boys - (father's height + mother's height + 13) / 2, for girls - (father's height + mother's height - 13) / 2. However, the child's current height may deviate from the predicted one within 8-10 cm. The height calculator estimates the current development relative to peers, but the genetic potential can manifest itself gradually.
If the child's height and weight do not meet WHO standards (especially if the percentiles are <5% or >95%), it is recommended to consult a pediatrician. The doctor will conduct a full examination, evaluate the developmental history, nutrition, and possible diseases. Don't panic - deviations can be a variant of the norm (genetics, individual characteristics). It is important to monitor the dynamics of development and follow the doctor’s recommendations on nutrition, physical activity and possible treatment.
Anthropometry is the measurement of physical parameters of the body. To assess the anthropometry of a child, use the height and weight calculator: enter the gender, exact age in months (for children under one year), height in centimeters and weight in kilograms. The calculator will calculate percentiles of height and weight according to WHO standards, which is the basis of anthropometric assessment. Additionally, head and chest circumference can be measured, but these parameters are not taken into account in the standard height calculator.
The Z-score (standard deviation) is a statistic that shows how many standard deviations a child's score deviates from the median (50th percentile) for a given age and gender. Z-score = -2 corresponds to the 2nd percentile, Z-score = 0 - the 50th percentile, Z-score = +2 - the 98th percentile. The height calculator shows percentiles that are easy to interpret, but clinicians can use the Z-score for a more accurate statistical estimate.
The harmony of physical development is assessed by the ratio of height and weight percentiles. If both indicators are in the same percentile range (for example, height 50th percentile, weight 55th percentile), development is harmonious. If the percentiles are very different (for example, height 90th percentile, weight 10th percentile), this may indicate problems. The growth calculator automatically evaluates the harmonious development and makes recommendations in case of significant deviations.
The online height and weight calculator, based on WHO standards, is an accurate tool for preliminary assessment of physical development. However, it is not a substitute for pediatrician consultation and professional evaluation. Accuracy depends on the correctness of the entered data (accurate height and weight measurements, correct age). The calculator uses the same formulas and tables that doctors use, so the results are comparable to a medical assessment.
WHO growth standards are updated periodically based on new research and data. The current WHO standards for children 0 to 5 years of age were developed in 2006 based on a multi-year study of healthy breastfed children from different countries. These standards are considered current and are used throughout the world. Large-scale updates occur every 10-15 years, but small adjustments can be made as new data becomes available.
Caliperometry is the measurement of skinfold thickness to assess body composition (percentage of body fat). To assess physical development, height and weight are usually sufficient; caliperometry is used in specialized studies. The Height and Weight Calculator estimates overall physical development using height and weight percentiles, which is the standard for initial assessment. Caliperometry may be useful if overweight or obesity is suspected, but is not included in the basic height calculator.
The interpretation of height percentiles is the same for all ages from 0 to 5 years: <5% - below normal, 5-25% - below average, 25-75% - normal, 75-95% - above average, >95% - above normal. However, absolute height values change greatly with age: newborn - ~50 cm, 1 year - ~75 cm, 2 years - ~87 cm, 3 years - ~95 cm, 4 years - ~103 cm, 5 years - ~110 cm. The height calculator takes age into account when calculating percentiles automatically.
Yes, diseases can affect a child’s height and weight, which is reflected in the calculator results. Chronic diseases, hormonal disorders, and genetic syndromes can lead to deviations from normal percentiles. If the calculator results show significant deviations, this may be a symptom of a medical condition. However, the height calculator does not diagnose diseases - it only estimates physical parameters. If you suspect a disease, be sure to consult your doctor.
For twins, the height calculator is used in the same way as for normal children: enter the gender, age, height and weight of each child separately. However, it is important to consider that twins may be smaller than their peers due to pregnancy factors (multiple pregnancies, premature birth). The growth of twins may be 1-3 cm behind that of single children, which is normal. Assess each twin's development individually, but consider family dynamics.