UK to US Bra Size Converter – Accurate Size Charts & Tips

Why does converting bra sizes from UK to US feel like solving a Rubik’s cube with your eyes closed?
One minute you’re a 34D, the next you’re a 36C or maybe even a 32DD. Are we shopping for bras or cracking the Da Vinci Code?

Welcome to the world of UK to US bra size conversions, where every cup size comes with drama, confusion, and a side of emotional whiplash. But don’t panic—we’ve built this bra size converter to make things easy.

Whether you’re switching between UK and US sizing, trying to find your sister size, or just tired of bras that lie—this chart’s got your back (and your front).

🧪 Bra Types and Cup Sizes (UK vs. US)

Each bra type serves a purpose, from seamless coverage to defying gravity. Below, we’ve merged bra types with cup sizes (A to G) and created a table for each, showing UK and US sizing with underbust and bust measurements. All measurements are in inches for consistency.

T-Shirt Bra Size Chart

For when you want smooth, invisible coverage under fitted tops.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Great for petite frames.
32B	32B	28-29	33-34	Perfect for T-shirt bras.
34C	34C	30-31	36-37	Seamless under tight tops.
36D	36D	32-33	39-40	Everyday comfort.
38DD	38DD	34-35	42-43	Structured support.
30E	30DD	26-27	34-35	Enhanced coverage.
32F	32DDD	28-29	37-38	Smooth silhouette.
34FF	34G	30-31	40-41	Specialty fit.
36G	36G	32-33	43-44	Full-bust support.

Balconette Size Chart

Lifts like you’re in a period drama, perfect for low-cut dresses.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Petite lift.
32B	32B	28-29	33-34	Subtle balconette lift.
34C	34C	30-31	36-37	Enhances cleavage.
36D	36D	32-33	39-40	Dramatic lift.
38DD	38DD	34-35	42-43	Structured support.
30E	30DD	26-27	34-35	Bold silhouette.
32F	32DDD	28-29	37-38	Specialty fit.
34FF	34G	30-31	40-41	Enhanced lift.
36G	36G	32-33	43-44	Full-bust drama.

Push-Up Bra Size Chart

Turns an A cup into a social experiment with extra cleavage.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Boost for petite busts.
32B	32B	28-29	33-34	Popular for push-up bras.
34C	34C	30-31	36-37	Noticeable lift.
36D	36D	32-33	39-40	Enhanced cleavage.
38DD	38DD	34-35	42-43	Dramatic boost.
30E	30DD	26-27	34-35	Structured lift.
32F	32DDD	28-29	37-38	Full-bust enhancement.
34FF	34G	30-31	40-41	Specialty push-up.
36G	36G	32-33	43-44	Maximum boost.

Bralette Size Chart

Cute, useless, mostly vibes—perfect for lounging.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Light bralette support.
32B	32B	28-29	33-34	Casual comfort.
34C	34C	30-31	36-37	Soft and stylish.
36D	36D	32-33	39-40	Relaxed fit.
38DD	38DD	34-35	42-43	Minimal support.
30E	30DD	26-27	34-35	Soft coverage.
32F	32DDD	28-29	37-38	Lounge-ready.
34FF	34G	30-31	40-41	Specialty bralette.
36G	36G	32-33	43-44	Maximum comfort.

Sports Bra Size Chart

Straps you in like you’re going to war—perfect for workouts.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Light workout support.
32B	32B	28-29	33-34	Medium sports bra support.
34C	34C	30-31	36-37	High-impact ready.
36D	36D	32-33	39-40	Bounce control.
38DD	38DD	34-35	42-43	Full support.
30E	30DD	26-27	34-35	Structured workout fit.
32F	32DDD	28-29	37-38	High-impact support.
34FF	34G	30-31	40-41	Specialty sports bra.
36G	36G	32-33	43-44	Maximum stability.

Strapless Bra Size Chart

Stays up by sheer witchcraft—or not at all.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Petite strapless bra.
32B	32B	28-29	33-34	Light support.
34C	34C	30-31	36-37	Stable for dresses.
36D	36D	32-33	39-40	Firm grip.
38DD	38DD	34-35	42-43	Structured hold.
30E	30DD	26-27	34-35	Specialty strapless.
32F	32DDD	28-29	37-38	Enhanced grip.
34FF	34G	30-31	40-41	Full-bust strapless.
36G	36G	32-33	43-44	Maximum hold.

Plunge Bra Size Chart

For when you’re showing more chest than a Game of Thrones scene.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Petite plunge bra.
32B	32B	28-29	33-34	Subtle cleavage.
34C	34C	30-31	36-37	Deep neckline ready.
36D	36D	32-33	39-40	Enhanced plunge.
38DD	38DD	34-35	42-43	Dramatic cleavage.
30E	30DD	26-27	34-35	Structured plunge.
32F	32DDD	28-29	37-38	Deep V-neck fit.
34FF	34G	30-31	40-41	Specialty plunge.
36G	36G	32-33	43-44	Maximum cleavage.

Minimizer Size Chart

Lies to the world for you, reducing bust appearance.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Minimal minimizer effect.
32B	32B	28-29	33-34	Subtle reduction.
34C	34C	30-31	36-37	Smooth silhouette.
36D	36D	32-33	39-40	Noticeable reduction.
38DD	38DD	34-35	42-43	Full minimizer effect.
30E	30DD	26-27	34-35	Structured reduction.
32F	32DDD	28-29	37-38	Enhanced minimizer.
34FF	34G	30-31	40-41	Specialty fit.
36G	36G	32-33	43-44	Maximum reduction.

Full Coverage Size Chart

Like a hug from your grandma—safe, secure, boring.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30A	30A	26-27	31-32	Petite full coverage.
32B	32B	28-29	33-34	Everyday comfort.
34C	34C	30-31	36-37	Maximum coverage.
36D	36D	32-33	39-40	Full support.
38DD	38DD	34-35	42-43	Structured fit.
30E	30DD	26-27	34-35	Enhanced coverage.
32F	32DDD	28-29	37-38	Full-bust support.
34FF	34G	30-31	40-41	Specialty full coverage.
36G	36G	32-33	43-44	Maximum support.

💡 US uses DDD, UK jumps to E. UK also loves double letters (FF, GG), while US just keeps climbing the alphabet.

UK Bra Size Chart (Inches)

Use this bra size chart UK inches to find your bra size UK or convert to US sizes.

UK Size	US Size	Underbust (in)	Bust (in)	Notes
30D	30D	26-27	33-34	Petite, great for fitted tops.
30E	30DD	26-27	34-35	Ideal for sports bras.
30F	30DDD	26-27	35-36	Perfect for full-coverage bras.
30G	30G	26-27	36-37	Suits specialty lingerie.
30H	30H	26-27	37-38	Common in plus-size ranges.
32B	32B	28-29	33-34	Versatile for everyday wear.
32C	32C	28-29	34-35	Popular for push-up bras.
32E	32DD	28-29	36-37	Great for structured bras.
32F	32DDD	28-29	37-38	Full-bust support.
34B	34B	30-31	35-36	Standard size for many brands.
34C	34C	30-31	36-37	Ideal for wireless bras.
34D	34D	30-31	37-38	Popular for everyday bras.
34G	34G	30-31	40-41	Specialty fit bras.
34H	34H	30-31	41-42	Plus-size collections.
36B	36B	32-33	37-38	Lightweight bras.
36C	36C	32-33	38-39	Comfort bras.
36D	36D	32-33	39-40	Full-coverage styles.
38B	38B	34-35	39-40	Everyday comfort.
38C	38C	34-35	40-41	Plus-size bras.
38D	38D	34-35	41-42	Full-coverage designs.

How to Measure Bra Size UK at Home

Follow these steps to measure bra size UK using our bra size calculator UK:

1. Underbust Measurement: Wrap a tape measure snugly under your breasts. Round to the nearest inch or cm (bra size calculator UK cm).
2. Bust Measurement: Measure around the fullest part of your bust, keeping the tape level (how to measure bust size UK).
3. Calculate UK Bra Size: Enter measurements into our tool to calculate bra size UK. Band size is based on underbust; cup size is the bust-underbust difference.
4. Convert to US: See the US equivalent instantly (e.g., UK bra size to US for 32C = 32C).

For detailed measuring tips, visit Good Housekeeping’s guide to bra fitting.

Why Use a Bra Size Calculator UK?

Incorrect bra sizes can cause discomfort or poor support. UK and US bra sizes differ, especially in cup sizing (e.g., UK 30E to US 30DD). Our best bra size calculator UK helps you:

• Measure bra size UK at home with a tape measure.
• Calculate bra cup size UK for a precise fit.
• Convert UK bra size to US for international shopping.
• Use bra size calculator UK inches or bra size calculator UK cm for flexibility.

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Tips to Find Your Bra Size UK

• Use a Soft Tape Measure: Ensure accurate bra size measurements UK with a flexible tape.
• Measure in Inches or CM: Our bra size calculator UK inches and bra size calculator UK cm support both units.
• Check Fit: A well-fitted bra should sit flat on the chest and feel snug (how to check bra size UK).
• Try Sister Sizes: If 34C feels tight, try 36B (sister size calculator UK).
• Consider Bra Type: Sports bras or plus-size bras may fit differently (plus size bras UK).

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Why Our UK Bra Size Calculator Stands Out

• Accurate: Best bra size calculator UK for measuring bra size UK at home.
• Versatile: Supports bra size calculator in inches UK and bra size calculator cm UK.
• Interactive: Converts UK bra size to US bra size with fun facts and tips.
• Shareable: Share via Facebook, X, Pinterest, or Instagram.
• Embeddable: Add to your site with our embed code.

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Formula to Measure Bra Size UK with Our Calculator

To accurately measure bra size UK using our bra size calculator UK, follow this simple formula to calculate bra size UK at home:

1. Measure Your Underbust (Band Size)

Use a soft measuring tape to measure snugly just under your bust.

Underbust Measurement	UK Band Size	USA (American) Band Size (UK + 4 Rule)
23–25 inches	28 band	32 band
25–27 inches	30 band	34 band
27–29 inches	32 band	36 band
29–31 inches	34 band	38 band
31–33 inches	36 band	40 band
33–35 inches	38 band	42 band

• Use inches or cm:
  Example: 24 inches (or 61 cm)
• Round to the nearest even number, then use the chart below to determine your band size:

2. Measure Your Bust (Cup Size)

Wrap the tape around the fullest part of your bust, keeping it level.

• Formula:
  Bust measurement – Underbust measurement = Cup Size

Difference (inches)	UK Cup Size	USA (American) Cup Size
Less than 1″	AA	AA
1 inch	A	A
2 inches	B	B
3 inches	C	C
4 inches	D	D

3. Combine to Find Your UK Bra Size

Example:

• Underbust = 24 inches → Band Size = 28
• Bust = 25 inches → Difference = 1 inch → Cup Size = A
  Result: 28A (UK Size)

💡 Or simply enter your measurements into our UK Bra Size Calculator for instant results.

4. Convert Your UK Bra Size

System	Example Conversion for UK 28AA
UK	28AA
US / CA (add 4 to band)	32AA
UK (with +4 method)	32AA
UK (dress size method)	4AA (Band = Underbust – 24)

Frequently Asked Questions

Find Your Perfect Fit Today

Our UK bra size calculator helps you effortlessly measure your UK bra size and convert it to US or Canadian sizes using different methods, including the underbust +4 rule and UK dress size equivalency.