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Bra Size Calculator

Enter your measurements to find your Australian bra size and US equivalent. Measure while wearing a non-padded bra or bralette for best accuracy.

Need extra help after the calculator? Read the full bra size guide, the 10E guide, the 14E conversion guide, or the sports bra size guide.

Got your size? Shop by style

Now you know your size, here's a top pick in each of the most popular styles. SmartKoala may earn from qualifying purchases.

Need a few bra options after you calculate?

These Amazon links are a quick starting point for different styles. As an Amazon Associate, SmartKoala may earn from qualifying purchases.

T-shirt bra · full-support bra · wirefree bra · sports bra · strapless bra

cm
Measure snugly around your ribcage, just under your bust. Exhale and take the measurement.
cm
Measure loosely around the fullest part of your bust, parallel to the floor.

AU/UK Bra Size Chart

AU and UK sizing uses the same scale. US sizing uses a different band number (AU band + 20 ≈ US band for sizes 8–16).