内衣尺码计算工具

免费在线工具,将身体测量数据转换为准确的罩杯和底围尺码,适用于美、英、欧、法及亚洲标准。

Bra Size Calculator
How to Measure
Size Chart

Your Measurements

Measure around the fullest part of your bust
Measure snugly under your bust

Measurement Tips

  • Upper Bust: Lean forward 45° and measure around the fullest part of your bust
  • Under Bust: Stand straight and measure snugly around your ribcage under the bust
  • Keep the tape parallel to the floor for accurate results
  • Measure without a bra or wear a thin unlined bra
  • Take measurements 3 times and use the average

Step-by-Step Measurement Guide

What You Need

  • A soft measuring tape (flexible cloth tape measure)
  • A mirror to check your posture
  • A comfortable environment where you can measure accurately

Step 1: Measure Your Under Bust (Band Size)

Stand straight with your arms relaxed at your sides. Wrap the measuring tape snugly around your ribcage, just under your bust. Make sure the tape is parallel to the floor all the way around. Record this measurement in centimeters.

Step 2: Measure Your Upper Bust (Over Bust)

Lean forward approximately 45 degrees so your back is parallel to the floor. Wrap the measuring tape around the fullest part of your bust. The tape should be loose enough to allow a finger to slide underneath but not too tight. Record this measurement in centimeters.

Step 3: Calculate Your Cup Size

Subtract your under bust measurement from your upper bust measurement. The difference determines your cup size:

Cup Size = Upper Bust - Under Bust

Common Cup Size Differences

Difference (cm) Cup Size
10 cmA Cup
12.5 cmB Cup
15 cmC Cup
17.5 cmD Cup
20 cmE / DD Cup
22.5 cmF Cup
25 cmG Cup
27.5 cmH Cup

Important Notes

  • Measurements may vary slightly between brands - always try on before buying
  • Your bra size can change over time due to weight fluctuations, pregnancy, or hormonal changes
  • Re-measure every 6-12 months or after significant body changes
  • Different countries use different sizing systems - use our converter above

International Bra Size Comparison

This chart shows the equivalent band sizes across different international standards.

EU / FR International (cm) US / UK (inches) UK Asia (JP/CN)
6565-6728-293070
7068-7230-313275
7573-7732-333480
8078-8234-353685
8583-8736-373890
9088-9238-394095
9593-9740-4142100
10098-10242-4344105

Cup Size by Country

Cup sizes are generally consistent across countries, but some regions have slight variations:

Cup Difference (cm) US/UK EU Asia
A10AAA
B12.5BBB
C15CCC
D17.5DDD
DD/E20DD/EEE
F22.5FFF
G25GGG
H27.5HHH

Global Bra Size Statistics

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关于 内衣尺码计算工具 的常见问题

在线计算器与专业试衣相比准确率如何?

店内专业试衣仍优质,但研究显示,正确执行居家测量(特别是上围前倾法)准确率相当。本计算器使用行业标准公式(厘米差值=罩杯尺寸),与专业人士一致。主要优势在于随时免费重测,无需预约。

若测量值介于两个罩杯之间怎么办?

这种情况常见。如下胸围75cm、上胸围88.5cm,差值13.5cm。计算器显示最接近的标准罩杯(B杯为12.5cm,故接近B)。结果部分包含“姊妹尺码”,提供次优替代。建议试穿计算尺码及其最近姊妹尺码。

男性能否使用此计算器测量胸围或应对男性乳腺增生?

完全可以。基于两个周长的物理差值计算,不分配性别,仅对应输入数值。寻求男性乳腺增生缓解的男性常借助此工具寻找舒适运动内衣或压缩服。隐私与准确性规则相同。

为何不同品牌尺码结果不同?

品牌常使用“虚荣尺码”或针对目标市场调整剪裁。计算器提供基于国际协议的标准尺码。将结果作为起点,结合品牌专属尺码表(常建议罩杯加减)。工具内的换算表通过展示底围原始等效值,助你跨越标准差异。

有移动版或需下载APP吗?

无需APP或下载。此在线内衣尺码计算器完美运行于智能手机、平板或电脑。作为渐进式网页工具,可将页面添加至手机主屏幕快捷访问。相比重型APP,不耗电、不索求多余权限。这是轻量级网页,试衣间亦可使用。

多久应重测内衣尺码?

建议每6至12个月一次。体重显著变化(增减超5-7kg)、怀孕、哺乳或新健身计划后应立即重测。月经周期激素变化亦可能暂时影响尺码。许多用户收藏此计算器,每年检查两次,如同更换烟雾报警器电池般常规。