Bra Size Calculator: Australia

Measure once, and this calculator highlights your size in Australia's AU convention while showing all 7 international systems for imported brands. Enter your snug underbust and fullest bust below.

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Shopping for bras in Australia

Australia numbers bands by dress-size logic: an AU 10 band equals a US 32, AU 12 a US 34, and so on. Cups mostly follow the UK ladder, so an AU 12DD is close to a UK 34DD. Confusion arrives with US imports whose DDD does not exist locally.

Aussie brands like Berlei and Bonds fit warm-climate priorities: breathable fabrics, wirefree engineering and strong sports bra ranges tested for impact.

Brands you will commonly see: Berlei, Bonds, Bras N Things, Lovable.

How Australia writes a bra size

Australia uses dress-size numbering for the band, which is the American band minus 22: a US 34 is a 12 on an Australia tag.

Cups follow the British ladder, doubled letters included, so DD, E, F and FF all appear.

Sizes are written band first, then cup, as in 12DD.

AU size conversion chart

Every row is one body. The AU column is what the label prints; the others are what the same bra is called elsewhere, which is what you need when a brand ships from abroad.

AU	US	UK	EU	FR	JP
10B	32B	32B	70B	85B	C70
10D	32D	32D	70D	85D	E70
12B	34B	34B	75B	90B	C75
12C	34C	34C	75C	90C	D75
12D	34D	34D	75D	90D	E75
12DD	34DD	34DD	75E	90E	F75
14C	36C	36C	80C	95C	D80
14D	36D	36D	80D	95D	E80
14DD	36DD	36DD	80E	95E	F80
14E	36DDD	36E	80F	95F	G80
16D	38D	38D	85D	100D	E85
16DD	38DD	38DD	85E	100E	F85
18D	40D	40D	90D	105D	E90

Common Australia conversions, answered

What is a US 34D in Australia?

A US 34D is a 12D in Australia. The same bra is a UK 34D and an EU 75D.

What is a US 34DD in Australia?

A US 34DD is a 12DD in Australia. The same bra is a UK 34DD and an EU 75E.

What is a US 36DD in Australia?

A US 36DD is a 14DD in Australia. The same bra is a UK 36DD and an EU 80E.

What is a US 36DDD in Australia?

A US 36DDD is a 14E in Australia. The same bra is a UK 36E and an EU 80F.

Look up a specific size

32D 32DD 32DDD 32F 32I 32K 34D 34DD

28 band 30 band 32 band 34 band 36 band 38 band 40 band 42 band

Frequently asked questions

What bra sizing system does Australia use?

Australia primarily uses AU sizing conventions in mainstream retail, though imported brands can carry other systems' labels. The calculator above highlights your AU size and shows all 7 systems for imports.

Which bra brands are common in Australia?

Commonly available names include Berlei, Bonds, Bras N Things, Lovable. Local availability shifts, and each brand's own centimeter chart beats any converted label when they disagree.

What is a US 34DD in Australia sizing?

A US 34DD is a 12DD in Australia. The same bra is a UK 34DD and an EU 75E, because the cup ladders diverge after D.

Do I add inches to my underbust measurement in Australia?

No. The old habit of adding four or five inches was written for non-stretch fabric and produces a band about two sizes too loose on a modern elastic one. Measure snug and level, and use that number directly, whichever system the label uses.

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Last updated August 2026.