Bra Size Calculator

Why is it so hard to find a bra that fits?

It is an industry statistic that is repeated often for a reason: 80% of women are wearing the wrong bra size. Why? Because bodies change constantly due to weight fluctuations, hormones, and age, but most of us stick to the same size we bought five years ago.

Furthermore, sizing systems are confusing. A "DDD" in the United States is an "E" in the United Kingdom and an "F" in Europe. Our calculator above simplifies this math by instantly converting your raw measurements into the correct labels for every major region.

How to Measure Yourself Correctly

For the most accurate results, you need a soft tape measure and a mirror. It is best to wear a non-padded bra (or no bra at all if gravity permits) while measuring to get your true shape.

Step 1: The Band (Underbust)

Wrap the tape measure directly under your bust, where the bra band would sit. The tape should be level and snug against your skin. Exhale deeply to get the smallest measurement possible.

• If you get an odd number (e.g., 31 inches), most brands suggest rounding to the nearest even number (32 or 30).
• The band provides 80% of the support, so it must be firm.

Step 2: The Cup (Bust)

Wrap the tape around the fullest part of your chest (usually across the nipple line). The tape should be straight across your back but loose enough that it doesn't compress your breast tissue.

US vs. UK Sizing: The "D" Cup Split

Up until a D cup, US and UK sizes are identical. However, once you go larger than a D, the systems diverge drastically. This is where most online shopping mistakes happen.

As you can see, a US "H" cup is actually a UK "FF". If you order a UK brand (like Panache or Freya) using your US size, the cup will be far too massive.

Common Fit Problems & Solutions

Once you have your calculated number, use these physical checks to ensure the bra actually fits:

• The Gore Floats: The "gore" (the center piece between the cups) should lay flat against your sternum. If it floats away from your chest, the cups are too small.
• The Quad-Boob: If breast tissue spills over the top edge of the cup, it is too small. Go up a cup size.
• Straps Digging In: This usually means the band is too loose. If the band is loose, the heavy lifting is transferred to the straps, causing shoulder pain. Tighten the band, don't just tighten the straps.