online bra size calculator
A free online bra size calculator that helps you find your correct bra size at home in two simple steps, with sister-size charts and fitting guidance.
bra-sizecalculator.com
About online bra size calculator
Bra-SizeCalculator.com is a free, private tool for finding your correct bra size at home. It guides you through measuring your underbust and overbust with a soft tape, then converts those two numbers into a band and cup size across seven global sizing systems. Clear instructions explain how to stand, breathe normally, and keep the tape level, so the result is more reliable than guessing from a shop size. Sister-size charts help when a size is out of stock, and short fitting guides explain common problems such as a riding band or gaping cups.
Key features
- Free two-step and six-step bra size calculators
- Sizing across seven global bra sizing systems
- Sister-size charts for easy size swaps
- Plain-language fitting and measuring guides
- Private, in-browser calculation with no sign-up
Who is this website for?
Anyone who wants to check their bra size at home before shopping, especially people between sizes or buying online.
What can visitors do here?
Visitors can enter two tape measurements and get a suggested bra size in seconds, then compare sister sizes and read fitting tips before choosing a bra.
What makes it different?
It combines a quick two-step calculator with a more detailed six-step version and covers seven sizing systems, so one measurement set works for many brands and countries.
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