We build small, focused calculators that answer one question well. This one answers: what bra size am I actually wearing? — a question most shoppers in India have never had answered accurately, because most sizing charts online are built for US or UK bodies and measurement habits.
Band and cup sizes are simple math once you have two honest measurements, but most guides bury that math under outdated rules, confusing regional labels, and inconsistent brand sizing. We wanted a tool that does the arithmetic correctly, explains it in plain language, and shows how the result maps across India, the UK, the US and the EU — in one place, for free.
It is not a substitute for an in-person fitting, a medical device, or a diagnostic tool. It gives a mathematically sound starting estimate from two measurements you provide. Fit still depends on the brand, the fabric, and your own comfort — please read our disclaimer for the full picture.
Bra Calculator is part of the Calculations.one family of single-purpose calculators, which also includes tools for everyday nutrition and fitness math. We keep each site small, fast, and free of unnecessary sign-ups.
Spotted an error in our numbers or copy? Have a suggestion? Visit our contact page — we read every message ourselves.