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Your Accurate UK Bra Size Calculator Guide

Welcome to the definitive guide for finding your perfect UK bra size. Whether you prefer measuring in inches or centimeters, our calculator and this guide make it simple. We aim to be the best bra size calculator UK residents can rely on, offering accurate results and clear explanations. Use our free online bra size calculator UK tool on the main page for instant results.

Measuring Your UK Bra Size in Inches

Using inches is a common method in the UK. Our bra size calculator UK inches function uses the standard UK calculation:

  • Band Measurement: Measure snugly under your bust in inches. If the number is even, add 4 inches. If odd, add 5 inches. (Note: Some modern methods suggest using the raw measurement rounded up to the nearest even number. Our main calculator uses the +4/+5 method derived from common charts.)
  • Bust Measurement: Measure around the fullest part of your bust in inches.
  • Cup Size Calculation: Subtract the calculated band size from the bust measurement. The difference in inches determines your UK cup size (1"=A, 2"=B, 3"=C, 4"=D, 5"=DD, 6"=E, 7"=F, 8"=FF, etc.). Refer to the chart on the main page for the full US/UK cup conversion.

For precise results using this method, ensure you're using a reliable UK bra size calculator in inches, like the one on our homepage.

Measuring Your UK Bra Size in CM

Prefer metric? No problem. Our calculator functions as a bra size calculator UK in cm too. While UK sizing itself is based on inches, you can easily measure in centimeters and let our tool convert.

  • Measure: Take your underbust and bust measurements in centimeters.
  • Input: Enter these CM values into our calculator and select "CM".
  • Get UK Size: The calculator will automatically convert the CM measurements to determine the correct UK band and cup size (e.g., 34DD).

This makes our tool an effective UK bra size calculator cm users can trust for accurate UK sizing, even when starting with metric measurements. Many search for "bra size calculator uk cm online," and our tool provides exactly that functionality.

UK Bra Size Conversion: UK to EU

Shopping from European brands? Understanding the conversion is key. Use our calculator as a bra size calculator UK to EU converter.

  • Band Size Difference: UK band sizes are in inches (32, 34, 36...), while EU sizes are in centimeters and relate more directly to the underbust measurement (70, 75, 80...). A UK 32 is roughly an EU 70, a UK 34 is roughly an EU 75, and so on.
  • Cup Size Similarity: Generally, cup sizes up to D are similar (UK D ≈ EU D). However, after DD, the systems diverge. UK uses DD, E, F, FF, G..., while EU often continues with E, F, G, H... (though variations exist).
  • Calculator Advantage: Our tool automatically calculates your equivalent EU size when you get your UK size, removing the guesswork.

Finding the Best & Most Accurate UK Fit

Beyond measurements, achieving the perfect fit involves checking key areas. When trying on your calculated size, look for:

  • Band: Snug and level around your back, not riding up. You should only be able to fit two fingers underneath comfortably.
  • Cups: Breast tissue fully contained within the cups without spilling over the top, sides, or bottom. No gaping.
  • Straps: Comfortable on your shoulders, providing some support but not digging in. Most support should come from the band.
  • Centre Gore: The panel between the cups should lie flat against your sternum (for most bra types).

Relying on an accurate UK bra size calculator like ours gives you the best starting point, but always confirm the fit by trying bras on, as sizing can vary slightly between brands.