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.
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.
Not every bra in your size will fit the same
After you get your size, compare a couple of cuts if you can. A T-shirt bra, sports bra, and strapless bra can all fit differently in the exact same labelled size. Browse options.
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).