Stature-for-Age Percentile Calculator (Chinese National Standard, 3-18 Years)

How Stature-for-Age Percentiles Work (Chinese National Standard)

This calculator uses LMS parameters from the Chinese National Survey for children aged 3 to 18 years (36-216 months). Standing height (stature) is the standard measurement for children over 3 years old.

Example Calculation

A 10-year-old boy (120 months) with a height of 140.2 cm would be approximately at the 50th percentile, since the Chinese median stature for boys at 120 months is 140.2 cm.

Frequently Asked Questions

Why does this start at age 3?

Standing height is measured differently from recumbent length. For children under 3, use the length-for-age calculator instead. Standing height is typically about 0.5-1 cm shorter than recumbent length.

How accurate are the Chinese growth standards?

The Chinese national standards are based on large representative samples of Chinese children and are widely used in clinical practice across China.

At what age should I switch from length to stature measurements?

The transition typically occurs around age 2-3 years. Recumbent length (lying down) is used for children under 2-3 years, while standing height (stature) is used for older children. Standing height is typically about 0.5-1 cm shorter than recumbent length due to the effects of gravity.