📏 身高百分位计算器（成人参考值或自定义正态分布）Height Percentile Calculator (Adult Reference or Custom Normal Distribution)
输入身高，按所选人群的平均身高和标准差（正态分布近似）求 z 值和百分位，即比多少比例的人高；也可以反过来求某个百分位对应的身高。内置美国成年男女参考值（约 175.3 cm ± 7.6 和 161.3 cm ± 7.1），也可填写其他人群的数据。儿童请使用正式生长曲线。本地处理。Enter a height to get its z-score and percentile (the share of people you are taller than) under a normal approximation for the chosen group, or find the height for a given percentile. Built-in US adult references (about 175.3 cm ± 7.6 for men and 161.3 cm ± 7.1 for women) are included, or enter figures for another population. Use official growth charts for children. Processed locally.
使用说明与常见问题How-to & FAQ
「身高百分位计算器（成人参考值或自定义正态分布）」是什么？What is the Height Percentile demo?
输入身高，按所选人群的平均身高和标准差（正态分布近似）求 z 值和百分位，即比多少比例的人高；也可以反过来求某个百分位对应的身高。内置美国成年男女参考值（约 175.3 cm ± 7.6 和 161.3 cm ± 7.1），也可填写其他人群的数据。儿童请使用正式生长曲线。本地处理。Enter a height to get its z-score and percentile (the share of people you are taller than) under a normal approximation for the chosen group, or find the height for a given percentile. Built-in US adult references (about 175.3 cm ± 7.6 for men and 161.3 cm ± 7.1 for women) are included, or enter figures for another population. Use official growth charts for children. Processed locally.
如何使用「身高百分位计算器（成人参考值或自定义正态分布）」？How do I use the Height Percentile demo?
在「身高百分位计算器（成人参考值或自定义正态分布）」中，填写「计算」、「参考人群」、「单位」、「身高」、「百分位（大于 0、小于 100）」等参数，结果会随输入实时计算并显示在下方。Enter the height, the mean and the standard deviation, all in cm. The z-score and the percentile update as you type.
百分位是什么意思？What does the percentile mean?
第 90 百分位表示比约 90 % 的同类人群高。第 50 百分位就是中位数，接近平均身高。The 90th percentile means taller than about 90 % of the group. The 50th percentile is the median, close to the average.
参考数据从哪里来？Where do the reference figures come from?
内置值取自美国 CDC 国家健康与营养调查（NHANES 2015–2018）20 岁以上成人的平均身高（男约 175.3 cm、女约 161.3 cm），标准差为近似值。其他国家和年代差异明显，可选择自定义。The built-in values follow the US CDC NHANES 2015–2018 averages for adults 20 and over (men about 175.3 cm, women about 161.3 cm), with approximate standard deviations. Other countries and decades differ, so use custom figures where needed.
孩子能用吗？Can I use it for a child?
不适合。儿童身高随年龄变化很快，需要按年龄和性别查 WHO 或 CDC 生长曲线，有疑虑请咨询儿科医生。No. Children change quickly with age, so use WHO or CDC growth charts for age and sex, and ask a paediatrician if concerned.
能举个计算实例吗？Can you show a worked example?
例如在「身高百分位计算器（成人参考值或自定义正态分布）」中填 计算 = 由身高求百分位，参考人群 = 自定义，单位 = 厘米，身高 = 170，自定义平均值 = 170，自定义标准差 = 7，结果区显示：百分位：50；z 值：0；含义：约比 50 % 的人高；参考平均值：170 cm ± 7；⚠ 正态近似，只适用于成人；儿童和青少年请使用 WHO 或 CDC 生长曲线，并咨询医生。For example, entering Calculate = Percentile from height, Reference group = Custom, Units = cm, Height = 170, Custom mean = 170, Custom SD = 7 in the Height Percentile demo gives: Percentile: 50; z-score: 0; Meaning: Taller than about 50 % of people; Reference mean: 170 cm ± 7; ⚠ A normal approximation for adults only; for children and teenagers use WHO or CDC growth charts and ask a doctor.
哪些输入会被检查？Which inputs are validated?
「身高 cm」「均值 cm」「标准差 cm」都必须填写，而且都必须大于 0——0 和负数都会被拒绝；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区会指出是哪一项，不会给出数字。"Height cm", "Mean cm" and "SD cm" are all required and must be greater than 0 — zero and negative values are both rejected — and numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the field instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「身高百分位计算器（成人参考值或自定义正态分布）」的设置：「计算」可选 由身高求百分位、由百分位求身高（默认 由身高求百分位）；「参考人群」可选 美国成年男性（约 175.3 ± 7.6 cm）、美国成年女性（约 161.3 ± 7.1 cm）、自定义（默认 美国成年男性（约 175.3 ± 7.6 cm））；「单位」可选 厘米、英寸（默认 厘米）；「身高」默认 175；「百分位（大于 0、小于 100）」默认 90；「自定义平均值」默认 170；「自定义标准差」默认 7。每次生成结果都按当前设置处理。There are three inputs: "Height cm" (default 175), "Mean cm" (default 170) and "SD cm" (default 7). Change any of them and the result is recalculated straight away.
结果可以代替医生的建议吗？Can this replace medical advice?
不能。「身高百分位计算器（成人参考值或自定义正态分布）」基于常用公式给出估算，个体差异较大，如有健康问题请咨询医生或专业人士。No. The Height Percentile demo gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.
「身高百分位计算器（成人参考值或自定义正态分布）」免费吗？需要注册吗？Is the Height Percentile demo free? Do I need an account?
「身高百分位计算器（成人参考值或自定义正态分布）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Height Percentile demo is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.