Height Percentile Calculator

See what percentile your height falls into

Top

—

Percentile — —

Detailed Analysis

Your height —

Average height —

Difference —

Rank —

GUIDE

Learn more

What is a height percentile?

A height percentile is a statistical indicator showing where your height ranks within the same sex and age group. A 70th percentile means you are taller than 70 of 100 people and shorter than 30. The 50th percentile is exactly average; the higher the percentile, the taller you are. The calculation is based on the height distribution of a population (Korean, American, etc.), assuming a normal distribution and using a Z-score (standard deviations). It is useful for objectively comparing yourself with peers and, for growing children, for monitoring growth status.

Average height: history and current data

Average height has risen dramatically over the past century. In the 1910s adult Korean men averaged about 161 cm and women 148 cm; by the 2020s men reached 174 cm and women 161 cm — a 13 cm gain driven by better nutrition, living standards and medicine. By age group, men in their 20s average 174.0 cm, 30s 173.5, 40s 171.5, 50s 169.0, 60s 166.5; women in their 20s average 161.5 cm down to 155.0 cm in their 60s. Final adult height is shaped by genetics (60–80%), nutrition (20–30%) and environment (10%).

Key factors that determine height

Height is determined by multiple factors. Genetics is the largest, explaining 60–80% of a child's height. Predicted height: boy = (father + mother + 13) ÷ 2, girl = (father + mother − 13) ÷ 2 (±8 cm error). Nutrition is critical during growth — protein, calcium, vitamin D and zinc are essential for bone growth, and chronic deficiency can reduce final height by more than 10 cm. Sleep matters too, as growth hormone is mainly secreted during deep sleep; teens are advised 8–10 hours. Exercise stimulates growth plates, while illness and stress can delay growth.

Why monitoring children's height matters

Regularly measuring a growing child's height and tracking the percentile helps detect growth abnormalities early. Pediatricians use growth charts to plot height and weight as percentiles over time. A normal pattern keeps the percentile roughly constant. A sharp drop (e.g. 50% → 10%) or sharp rise can signal a problem. Below the 3rd percentile suggests short stature and warrants testing for growth-hormone deficiency, hypothyroidism or Turner syndrome; above the 97th may suggest gigantism or early puberty. Early detection and treatment can improve final height by 5–10 cm.

Short stature and treatment options

Short stature is defined as more than 2 standard deviations below the average for the same sex and age (below the 3rd percentile). Causes include familial short stature, constitutional growth delay, growth-hormone deficiency, hypothyroidism, Turner syndrome, chronic illness and malnutrition. Diagnosis uses bone-age X-rays, growth-hormone stimulation tests, thyroid tests and chromosomal analysis. For growth-hormone deficiency, hormone injections — started before puberty and continued until the growth plates close — can add 8–12 cm per year. They have no effect after closure, so early diagnosis is key.

Comparing average height across countries

Average height varies greatly by country and ethnicity. Dutch men average 183.8 cm — the tallest in the world — and women 170.4 cm. Nordic countries average 181–183 cm. In contrast, Southeast Asian averages are lower: Indonesian men 158 cm, women 147 cm. White American men average 177 cm, Japanese men 172 cm, Chinese men 169 cm (with the north 5–7 cm taller than the south). These differences combine genetics (60–80%) and environment (20–40%): second- and third-generation immigrants tend to grow 5–10 cm taller than in their home country, underscoring the role of environment.

Frequently asked questions

How is the height percentile calculated?

It computes a Z-score from the average height and standard deviation for your sex and age group, then converts it to a percentile assuming a normal distribution. This tool uses age-grouped average-height data.

What is the difference between "top %" and percentile?

A 70th percentile means 70% of people are shorter than you, which converts to the top 30%. The higher the percentile, the taller you are.