Bra Size Calculator

Our Bra Size Calculator helps you determine the bra size that fits your bust perfectly without causing any discomfort.

You can now easily find the standard bra size measurements for countries like the USA, UK, Belgium, European Union, New Zealand, France, Spain, and Australia.

How to Measure Bra Size?

Did you know: You should measure your bra size every six months to ensure a comfortable fit.

Measuring your bra size requires a smooth measuring tape. Using it, you can take accurate measurements of your band, bust, and cup size. Follow these steps for precise bra size calculation:

How to Measure Bust Size?

Measuring your bust is simple:

Wear a non-padded bra.
Wrap the measuring tape around the fullest part of your bust, just after exhaling.
Enter this measurement into our free bust-to-bra size converter to see your standard size chart for multiple countries.

How to Measure Bust

How to Measure Band Size?

To measure your band size:

Stand in front of a mirror with the measuring tape.
Wrap it around your chest, just under your breasts.
Ensure the tape is snug but not tight, and note the measurement.

Measure Band Size

How to Measure Cup Size?

Once you have your bust and band sizes:

Subtract your band size from your bust size to determine your cup size.
Enter these values into our bra size calculator to get your optimal bra size.

Example:

If your bust size is 36 inches and your band size is 32 inches:

Bust size = 36
Band size = 32
Cup size = Bust size - Band size = 36 - 32 = 4

Breast Size Chart

Each country has its own bra sizing system. Using a bra cup size chart, you can see your equivalent bra size across different regions:

USA
UK
EU (European Union)
France
Spain
Australia
New Zealand
Belgium

With these measurements, our bra size calculator provides an accurate estimate of your bra size internationally.

Here, we have breasts cup size chart for different countries below:

USA	UK	Europe	France/Spain	Japan
AA	A	A	A	A
A	B	B	B	B
B	C	C	C	C
C	D	D	D	D
D	DD	E	E	E
DD	E	F	F	F
DDD/E	F	G	G	G
F	G	H	H	H
G	H	I	I	I
H	I	J	J	J
I	J	K	K	K

The bra size conversion chart for band is as follows:

USA	UK	Europe	France/Spain	Japan	Australia
28	28	60	75	60	6
30	30	65	80	65	8
32	32	70	85	70	10
34	34	75	90	75	12
36	36	80	95	80	14
38	38	85	100	85	16
40	40	90	105	90	18
42	42	95	110	95	20
44	44	100	115	100	22
46	46	105	120	105	24
48	48	110	125	110	26

However, the standard breast sizes chart for US and UK along with cup diameter is as follows:

Underwire Size	Bra Size (US System)	Bra Size (UK System)	Cup Diameter
30	32A 30B 28C	32A 30B 28C	9.7 cm (3+5⁄6 in)
32	34A 32B 30C 28D	34A 32B 30C 28D	10.6 cm (4+1⁄6 in)
34	36A 34B 32C 30D 28E	36A 34B 32C 30D 28DD	11.4 cm (4+1⁄2 in)
36	38A 36B 34C 32D 30E 28F	38A 36B 34C 32D 30DD 28E	12.3 cm (4+5⁄6 in)
38	40A 38B 36C 34D 32E 30F 28G	40A 38B 36C 34D 32DD 30E 28F	13.1 cm (5+1⁄6 in)
40	42A 40B 38C 36D 34E 32F 30G 28H	42A 40B 38C 36D 34DD 32E 30F 28FF	14.0 cm (5+1⁄2 in)
42	44A 42B 40C 38D 36E 34F 32G 30H 28I	44A 42B 40C 38D 36DD 34E 32F 30FF 28G	14.8 cm (5+5⁄6 in)
44	44B 42C 40D 38E 36F 34G 32H 30I 28J	44B 42C 40D 38DD 36E 34F 32FF 30G 28GG	15.7 cm (6+1⁄6 in)
46	44C 42D 40E 38F 36G 34H 32I 30J 28K	44C 42D 40DD 38E 36F 34FF 32G 30GG 28H	16.5 cm (6+1⁄2 in)
48	44D 42E 40F 38G 36H 34I 32J 30K 28L	44D 42DD 40E 38F 36FF 34G 32GG 30H 28HH	17.4 cm (6+5⁄6 in)
50	44E 42F 40G 38H 36I 34J 32K 30L 28M	44DD 42E 40F 38FF 36G 34GG 32H 30HH 28J	18.2 cm (7+1⁄6 in)
52	44F 42G 40H 38I 36J 34K 32L 30M 28N	44E 42F 40FF 38G 36GG 34H 32HH 30J 28JJ	19.0 cm (7+1⁄2 in)
54	44G 42H 40I 38J 36K 34L 32M 30N 28O	44F 42FF 40G 38GG 36H 34HH 32J 30JJ 28K	19.9 cm (7+5⁄6 in)
56	44H 42I 40J 38K 36L 34M 32N 30O 28P	44FF 42G 40GG 38H 36HH 34J 32JJ 30K 28KK	20.7 cm (8+1⁄6 in)
58	44I 42J 40K 38L 36M 34N 32O 30P	44G 42GG 40H 38HH 36J 34JJ 32K 30KK	21.6 cm (8+1⁄2 in)
60	44J 42K 40L 38M 36N 34O 32P	44GG 42H 40HH 38J 36JJ 34K 32KK	22.4 cm (8+5⁄6 in)

With the help of our US Bra Size Chart, you can easily determine your bra size for different countries. Alternatively, you can try our Cup Size Calculator for precise results.

How Bra Size Calculator Works?

Our Bra Size Calculator USA is simple to use and helps you calculate your bra size accurately. Follow these steps:

Input:

Enter your bust size in the bust size menu.
Enter your band size in the band size menu.
Click the Calculate button.

Output:

The calculator provides:

Your accurate bra size.
A bra measurement chart for different countries that best suits your requirements.

FAQs

How To Measure Your Bra Size Without A Measuring Tape?

If you don’t have a measuring tape, you can use a thread to measure your bust, cup, and band sizes. Then use a standard debit card (length = 2.5 inches) as a reference to estimate your measurements. This way, you can measure your bra size at home easily.

What Bra Size Am I?

If you’re unsure of your bra size, simply measure your bust and band sizes as mentioned above, then enter the values into our bra size calculator to get your correct bra size instantly.

What Happens If You Do Not Wear a Bra?

Not wearing a bra may cause your breast tissue to stretch over time, potentially leading to sagging. Keep in mind that once breasts lose firmness, the change is usually permanent.

References:

From the source of Wikipedia: Bra Size – including topics like cup design origins, consumer fitting, engineered alternatives to traditional bras, and calculating cup volume and breast weight.

Other Languages: Sütyen Bedeni Hesaplama, Kalkulator Rozmiaru Biustonosza, Kalkulator Ukuran Bra Sesuai Berat Badan, Bh Größenrechner, Velikost Podprsenky Kalkulačka, Calculadora De Tamanho De Sutiã, Calculadora Talla Sujetador, Calcul Taille Soutien-Gorge, ブラサイズ計算.

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