Bra size calculator
Two measurements. A starting size for your fit.
For the most accurate fit, wear a non-padded bra and stand naturally.
Snug around your ribcage, below your bust.
Around the fullest part, without pulling tight.
Want a more detailed estimate? Use 6 measurements
Need measuring instructions and fit guidance? Use the full bra size calculator guide.
Remeasure with a level tape and check that you selected the correct sizing system.
Remeasure without compressing your bust, then compare cup coverage when trying a bra.
Cup size may need adjusting. Small changes help.
Keep your measured values. Compare sister sizes if the cup volume feels right but the band does not.
Use your actual measurements for the estimate, then compare band comfort and cup coverage.
FAQ
You need your underbust measurement and your bust measurement. Measure under the bust for band fit, then around the fullest part of the bust for cup volume.
Use whichever unit is easiest for you, but use the same unit for both fields. Mixing inches and centimeters will make the result unreliable.
Bra size is based on the relationship between band and bust measurements, so even a small change can shift the cup volume or band recommendation.
Treat it as a starting size. Brand, style, cup shape, fabric, and personal comfort can all affect the best fit.
Check that the tape was level and snug, then enter your actual measurements again. Do not change the numbers to force a size. If cup volume feels right but the band does not, compare sister sizes.
Different regions use different size labels. Choosing a country helps the calculator format the result in the sizing system you are most likely to shop in.
