Global Height Distribution and Regional Variation
According to NCD Risk Factor Collaboration 2020 data, the global average adult male height is 171 cm and female height is 159 cm. Regional variation is extreme: Dutch men average 183.8 cm while East Timorese men average 160.0 cm - a gap exceeding 23 cm. This range reflects the combined influence of genetics, nutrition, disease burden, and socioeconomic conditions across populations.
Genetics alone cannot explain these differences. Childhood nutrition, particularly protein intake during growth periods, and infectious disease frequency strongly influence adult height. The fact that average Japanese height increased by approximately 10 cm in the 50 years following World War II demonstrates the powerful role of environmental factors when genetic composition remains constant.
How Height Percentiles Are Calculated
Height distributions closely approximate a normal (Gaussian) distribution, allowing percentiles to be calculated precisely from the mean and standard deviation. MyRank uses country-, sex-, and age-specific parameters to determine where your height falls within the global distribution. The mathematical properties of the normal distribution make this calculation both straightforward and reliable.
For example, a Japanese male at 175 cm ranks at approximately the 70th percentile domestically (top 30%) but around the 65th percentile globally. This difference arises because average heights in Southeast Asia and parts of Africa are lower, expanding the population below any given threshold when the comparison group shifts from national to global.
Height and Socioeconomic Correlations
Multiple studies report a positive correlation between height and income. Case and Paxson (2008) found that each additional inch (2.54 cm) of height is associated with approximately 1.5-2% higher earnings. However, this is not a causal relationship. The prevailing interpretation is that childhood nutrition and health environments simultaneously influence both cognitive development and physical growth - a common cause producing a spurious correlation.
When viewing height rankings, it is essential not to attach value judgments to the results. Rankings indicate statistical position within a distribution, nothing more. Taller is not "better" in any meaningful sense. Height is largely determined by factors outside individual control, and the ranking serves as a tool for understanding global human diversity rather than establishing hierarchies.
What You Can Do After Growth Plates Close
Increasing height after reaching adulthood is essentially impossible. Once the epiphyseal plates (growth plates) fuse, longitudinal bone growth ceases permanently. However, posture improvement can produce apparent differences of 1-3 cm, as spinal compression from poor posture is both common and reversible through targeted exercise and ergonomic awareness.
MyRank's height ranking is designed as a tool for understanding your position within global human variation, not as a source of inadequacy about an immutable characteristic. The extraordinary diversity of human height across populations is itself a fascinating reflection of our species' adaptability to different environments and conditions over thousands of years.