👙 文胸尺码计算器Bra Size Calculator
由下胸围和上胸围按欧洲标准（EN 13402）计算欧码/中国码，并换算美码和英码（底围 + 罩杯），各品牌版型不同，仅供参考。Work out your EU/China bra size (EN 13402) from underbust and bust, converted to US and UK sizes (band + cup); brands vary, so treat it as a starting point.
使用说明与常见问题How-to & FAQ
「文胸尺码计算器」是什么？What is the Bra Size Calculator tool?
由下胸围和上胸围按欧洲标准（EN 13402）计算欧码/中国码，并换算美码和英码（底围 + 罩杯），各品牌版型不同，仅供参考。Work out your EU/China bra size (EN 13402) from underbust and bust, converted to US and UK sizes (band + cup); brands vary, so treat it as a starting point.
如何使用「文胸尺码计算器」？How do I use the Bra Size Calculator tool?
在「文胸尺码计算器」中，填写「单位」、「下胸围」、「上胸围（最丰满处）」等参数，结果会随输入实时计算并显示在下方。In the Bra Size Calculator: Fill in "Unit", "Underbust", "Bust (fullest point)"; results are recalculated instantly as you type.
尺码是怎么算的？How is the size worked out?
按欧洲标准 EN 13402：底围 = 下胸围取最近的 5 厘米（70、75、80…），胸围差 10–12 cm 为 AA、12–14 cm 为 A，此后每 2 cm 升一级；再按通用尺码对照表换算：欧码 60/65/70/75/80/85 = 美/英码 28/30/32/34/36/38（每 5 cm 对应 2 号），E 杯 = 美码 DD、英码 DD，F 杯 = 美码 DDD、英码 E。EN 13402: the band is the underbust rounded to the nearest 5 cm (70, 75, 80…); a 10–12 cm difference is AA, 12–14 cm is A, and each further 2 cm is one cup. Then the standard size-chart conversion: EU 60/65/70/75/80/85 = US/UK 28/30/32/34/36/38 (each 5 cm step is 2 band sizes), EU E = US DD = UK DD, EU F = US DDD = UK E.
为什么美/英码底围比我的下胸围英寸数大？Why is my US/UK band bigger than my underbust in inches?
欧码底围就是下胸围厘米数，而美/英码是一套标签：常见尺码表把欧 70 对应 32、欧 75 对应 34（70 cm ≈ 27.6 英寸，并不等于 32 英寸）。这沿用了传统的“下胸围 + 4~5 英寸”标注习惯；有些英国品牌和测量方法改用“下胸围英寸数直接取整”（不加 4 英寸），按那种方法得到的底围会小 2 号、罩杯大几级。不同品牌差异很大，建议以该品牌的尺码表为准并试穿。An EU band is your underbust in centimeters, but US/UK bands are labels: standard charts map EU 70 to 32 and EU 75 to 34 (70 cm is about 27.6 in, not 32 in). This follows the traditional "underbust + 4–5 in" labelling; some UK brands and fitters instead use the underbust in inches as is (no +4), which gives a band 2 sizes smaller and a larger cup letter. Brands vary a lot, so check the brand's own chart and try it on.
测量方法？How should I measure?
下胸围：贴着胸部下缘水平量一圈，软尺贴紧；上胸围：站直，在胸部最丰满处水平量一圈，不要勒紧。Underbust: snugly around your ribcage right under the bust. Bust: standing straight, loosely around the fullest part.
结果可以代替医生的建议吗？Can this replace medical advice?
不能。「文胸尺码计算器」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 Bra Size Calculator gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.
「文胸尺码计算器」免费吗？需要注册吗？Is the Bra Size Calculator free? Do I need an account?
「文胸尺码计算器」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 Bra Size 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.