📊 百分位数计算器Percentile Calculator
计算数据集的任意百分位数、四分位数（Q1/Q2/Q3）和四分位距，或求某个值的百分位排名。Any percentile, quartiles (Q1/Q2/Q3) and IQR of a data set, or the percentile rank of a value.
使用说明与常见问题How-to & FAQ
「百分位数计算器」是什么？What is the Percentile Calculator?
计算数据集的任意百分位数、四分位数（Q1/Q2/Q3）和四分位距，或求某个值的百分位排名。Any percentile, quartiles (Q1/Q2/Q3) and IQR of a data set, or the percentile rank of a value.
如何使用「百分位数计算器」？How do I use the Percentile Calculator?
在「百分位数计算器」中，填写「数据（逗号或空格分隔）」、「百分位 p」、「求排名的值(可选)」等参数，结果会随输入实时计算并显示在下方。In the Percentile Calculator: Fill in "Data (comma/space separated)", "Percentile p", "Value for rank (optional)"; results are recalculated instantly as you type.
计算精度如何？How precise are the results?
「百分位数计算器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Percentile Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「百分位数计算器」免费吗？需要注册吗？Is the Percentile Calculator free? Do I need an account?
「百分位数计算器」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 Percentile Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.