Ready to find the perfect fit? Our easy-to-use calculator will guide you step by step.
Use a soft, flexible measuring tape.
Choose inches or centimeters.
Wear a non-padded bra or no bra.
To your measuring tape is level.
Wrap the measuring tape snugly around your ribcage, directly under your bust. Make sure the tape is level and straight across your body.
Tip: If the measurement falls between two numbers, round it to the nearest whole number.
Wrap the measuring tape around the fullest part of your bust. Ensure the tape is parallel to the ground and is not too tight or too loose.
Tip: Round the measurement to the nearest whole number if it falls between two values.
Subtract your band size (Step 1) from your bust size (Step 2). The difference determines your cup size. Each inch difference typically corresponds to a cup size:
Refer to the cup size chart below corresponding to your country's sizing standards
Difference in (cm) | UK | US | EU | FR | AU |
---|---|---|---|---|---|
<1 | AA | AA | AA | AA | AA |
1 (2.5) | A | A | A | A | A |
2 (5.1) | B | B | B | B | B |
3 (7.6) | C | C | C | C | C |
4 (10.2) | D | D | D | D | D |
5 (12.7) | DD | DD/E | E | E | DD |
6 (15.2) | E | DDD/F | F | F | E |
7 (17.8) | F | DDDD/G | G | G | F |
8 (20.3) | FF | H | H | H | G |
9 (22.9) | G | I | I | I | H |
10 (25.4) | GG | J | J | J | I |
11 (27.9) | H | K | K | K | J |
12 (30.5) | HH | L | L | L | K |
13 (33.0) | J | M | M | M | L |
14 (35.6) | JJ | N | N | N | M |
15 (38.1) | K | O | O | O | N |
16 (40.6) | KK | P | P | P | O |
17 (43.2) | L | Q | Q | Q | P |
18 (45.7) | M | R | R | R | LL |
Start by using our online bra size calculator available on the left side of your screen. With your band and bust measurements in hand, enter these values into the calculator. Make sure to select your preferred measurement unit—either inches or centimeters. The calculator will analyze your measurements and provide you with the ideal bra size tailored to your body.
If you prefer to manually calculate your bra size, simply combine the band size you measured earlier with the cup size obtained from the chart. For example, if your measured band size is 38 and you have determined a cup size of F from the chart, then your complete bra size would be 38F. This manual method allows you to double-check the calculator's accuracy and ensures a perfect fit.
Some brands use a traditional calculation method to determine band size, which involves adding 4 inches to your actual underbust measurement. For instance, if your actual band measurement is 34 inches, these brands would calculate your band size as 38. This method can vary significantly from modern fitting practices, so it's essential to be aware of the sizing method used when selecting bras from different brands.
Once you have your calculated bra size, try on different bras in that size to check for comfort and support. Remember, bra sizing can vary slightly between different brands and styles.
Get the most precise bra size calculations based on your unique measurements.
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