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Determining your American bra size can be very confusing. For starters, most women wear a bra that does not properly fit them. Beyond that, different countries use different sizing systems, adding to the confusion.
Contents
Bra Size Chart
I have a bra size calculator you can use to properly size yourself using not more than a measure tape. Once you have the correct measurements, use our US bra size conversion chart to get your breast and band size in inches and centimeters. In essence, this is a bra size calculator in inches and centimeters:
When you know your bra size, it’s relatively simple to convert that to inches. For example, if you are a 32A, that means your band is 32 inches. To determine your breast size, you’d add 1 inch to the band, meaning your breasts are 33 inches.
Each letter in a bra size is associated with an “inch” measurement that you can add to the band size to determine your bust size in inches:
- A cup: add 1 inch to band size
- B cup: add 2 inches to band size
- C cup: add 3 inches to band size
- D cup: add 4 inches to band size
- DD / E cup: add 5 inches to band size
- DDD / F cup: add 6 inches to band size
As you can see, figuring out your cup size in inches is not too hard once you know the formula. With centimeters, it’s a little more complicated, and you can use the chart below to see how bra sizes match up to specific centimeters.
| Bust measurement (in centimeters) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 76cm | 78cm | 80cm | 82cm | 84cm | 86cm | 88cm | 92cm | 94cm | 97cm | 99cm | 102cm | 104cm | 107cm | 109cm | 112cm | ||
| Band measurement (in centimeters) | 61cm | 30A | 30B | 30C | 30D | ||||||||||||
| 64cm | 30A | 30B | 30C | 30D | |||||||||||||
| 66cm | 30A | 30B | 30C | 30D | |||||||||||||
| 68cm | 32A | 32B | 32C | 32D | 32DD | 32DDD | |||||||||||
| 71cm | 32A | 32B | 32C | 32D | 32DD | 32DDD | |||||||||||
| 74cm | 34A | 34B | 34C | 34D | 34DD | 34DDD | |||||||||||
| 76cm | 34A | 34B | 34C | 34D | 34DD | 34DDD | |||||||||||
| 78cm | 36A | 36B | 36C | 36D | 36DD | 36DDD | |||||||||||
| 81cm | 36A | 36B | 36C | 36D | 36DD | 36DDD | |||||||||||
| 84cm | 38A | 38B | 38C | 38D | 38DD | 38DDD | |||||||||||
| 86cm | 38A | 38B | 38C | 38D | 38DD | 38DDD | |||||||||||
| 89cm | 40A | 40B | 40C | 40D | 40DD | ||||||||||||
| 92cm | 40A | 40B | 40C | 40D | 40DD | ||||||||||||
A Cup Conversions
An A cup breast is considered to be very small, and is often the bra size worn by teenagers who are still developing.
- A 30A has a band size of 30 inches and 61 centimeters, and an overbust size of 31 inches and 76 centimeters.
- A 32A has a band size of 32 inches and 68 centimeters, and an overbust size of 33 inches and 82 centimeters.
- A 34A has a band size of 34 inches and 74 centimeters, and an overbust size of 35 inches and 86 centimeters.
- A 36A has a band size of 36 inches and 78 centimeters, and an overbust size of 37 inches and 92 centimeters.
- A 38A has a band size of 38 inches and 84 centimeters, and an overbust size of 39 inches and 97 centimeters.
- A 40A has a band size of 40 inches and 89 centimeters, and an overbust size of 41 inches and 102 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30A | 30in | 31in | 61cm | 76cm |
| 32A | 32in | 33in | 68cm | 82cm |
| 34A | 34in | 35in | 74cm | 86cm |
| 36A | 36in | 37in | 78cm | 92cm |
| 38A | 38in | 39in | 84cm | 97cm |
| 40A | 40in | 41in | 89cm | 102cm |
B Cup Conversions
A B cup breast is considered small, but close to the average breast size.
- A 30B has a band size of 30 inches and 61 centimeters, and an overbust size of 32 inches and 78 centimeters.
- A 32B has a band size of 32 inches and 68 centimeters, and an overbust size of 34 inches and 84 centimeters.
- A 34B has a band size of 34 inches and 74 centimeters, and an overbust size of 36 inches and 88 centimeters.
- A 36B has a band size of 36 inches and 78 centimeters, and an overbust size of 38 inches and 94 centimeters.
- A 38B has a band size of 38 inches and 84 centimeters, and an overbust size of 40 inches and 99 centimeters.
- A 40B has a band size of 40 inches and 89 centimeters, and an overbust size of 42 inches and 104 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30B | 30in | 32in | 61cm | 78cm |
| 32B | 32in | 34in | 68cm | 84cm |
| 34B | 34in | 36in | 74cm | 88cm |
| 36B | 36in | 38in | 78cm | 94cm |
| 38B | 38in | 40in | 84cm | 99cm |
| 40B | 40in | 42in | 89cm | 104cm |
C Cup Conversions
Culturally speaking, the C cup is considered to be the average bra size.
- A 30C has a band size of 30 inches and 61 centimeters, and an overbust size of 33 inches and 80 centimeters.
- A 32C has a band size of 32 inches and 68 centimeters, and an overbust size of 35 inches and 86 centimeters.
- A 34C has a band size of 34 inches and 74 centimeters, and an overbust size of 37 inches and 92 centimeters.
- A 36C has a band size of 36 inches and 78 centimeters, and an overbust size of 39 inches and 97 centimeters.
- A 38C has a band size of 38 inches and 84 centimeters, and an overbust size of 41 inches and 102 centimeters.
- A 40C has a band size of 40 inches and 89 centimeters, and an overbust size of 43 inches and 107 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30C | 30in | 33in | 61cm | 80cm |
| 32C | 32in | 35in | 68cm | 86cm |
| 34C | 34in | 37in | 74cm | 92cm |
| 36C | 36in | 39in | 78cm | 97cm |
| 38C | 38in | 41in | 84cm | 102cm |
| 40C | 40in | 43in | 89cm | 107cm |
D Cup Conversions
While a D cup breast size is considered large by most cultures, it is actually the average boob size in America.
- A 30D has a band size of 30 inches and 61 centimeters, and an overbust size of 34 inches and 82 centimeters.
- A 32D has a band size of 32 inches and 68 centimeters, and an overbust size of 36 inches and 88 centimeters.
- A 34D has a band size of 34 inches and 74 centimeters, and an overbust size of 38 inches and 94 centimeters.
- A 36D has a band size of 36 inches and 78 centimeters, and an overbust size of 40 inches and 99 centimeters.
- A 38D has a band size of 38 inches and 84 centimeters, and an overbust size of 42 inches and 104 centimeters.
- A 40D has a band size of 40 inches and 89 centimeters, and an overbust size of 44 inches and 109 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30D | 30in | 34in | 61cm | 82cm |
| 32D | 32in | 36in | 68cm | 88cm |
| 34D | 34in | 38in | 74cm | 94cm |
| 36D | 36in | 40in | 78cm | 99cm |
| 38D | 38in | 42in | 84cm | 104cm |
| 40D | 40in | 44in | 89cm | 109cm |
DD Cup Conversions
By all accounts, DD boobs are large. They weigh quite a bit and can cause long term back issues.
- A 30DD has a band size of 30 inches and 61 centimeters, and an overbust size of 35 inches and 84 centimeters.
- A 32DD has a band size of 32 inches and 68 centimeters, and an overbust size of 37 inches and 92 centimeters.
- A 34DD has a band size of 34 inches and 74 centimeters, and an overbust size of 39 inches and 97 centimeters.
- A 36DD has a band size of 36 inches and 78 centimeters, and an overbust size of 41 inches and 102 centimeters.
- A 38DD has a band size of 38 inches and 84 centimeters, and an overbust size of 43 inches and 107 centimeters.
- A 40DD has a band size of 40 inches and 89 centimeters, and an overbust size of 45 inches and 112 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30DD | 30in | 35in | 61cm | 84cm |
| 32DD | 32in | 37in | 68cm | 92cm |
| 34DD | 34in | 39in | 74cm | 97cm |
| 36DD | 36in | 41in | 78cm | 102cm |
| 38DD | 38in | 43in | 84cm | 107cm |
| 40DD | 40in | 45in | 89cm | 112cm |
DDD Cup Conversions
DDD boobs are very large. At this size (and larger), they can become a nuisance and impact what you are able to do.
- A 30DDD has a band size of 30 inches and 61 centimeters, and an overbust size of 35 inches and 86 centimeters.
- A 32DDD has a band size of 32 inches and 68 centimeters, and an overbust size of 37 inches and 94 centimeters.
- A 34DDD has a band size of 34 inches and 74 centimeters, and an overbust size of 39 inches and 99 centimeters.
- A 36DDD has a band size of 36 inches and 78 centimeters, and an overbust size of 41 inches and 104 centimeters.
- A 38DDD has a band size of 38 inches and 84 centimeters, and an overbust size of 43 inches and 109 centimeters.
- A 40DD Dhas a band size of 40 inches and 89 centimeters, and an overbust size of 45 inches and 114 centimeters.
| Bra Size | Band (in) | Bust (in) | Band (cm) | Bust (cm) |
|---|---|---|---|---|
| 30DDD | 30in | 35in | 61cm | 86cm |
| 32DDD | 32in | 37in | 68cm | 94cm |
| 34DDD | 34in | 39in | 74cm | 99cm |
| 36DDD | 36in | 41in | 78cm | 104cm |
| 38DDD | 38in | 43in | 84cm | 109cm |
| 40DDD | 40in | 45in | 89cm | 114cm |
Conclusion
In conclusion, knowing your accurate bra size can make a huge difference in your comfort, confidence, and overall well-being. With the help of this US bra size chart in inches and centimeters, you can easily measure yourself at home and shop for bras with ease. Remember that each bra size will look quite a bit different on different women, depending on your bone structure, natural waistline, and body shape.