Loading…

How to use Bra Size Converter

Enter your US band number and select a cup letter. The tool applies each system's band formula and shows matching sizes side by side.

Frequently asked questions

How is EU band size calculated?

EU band ≈ US × 2.25 + 10, mapping the inch-based US band to the centimetre EU scale.

How do FR and BE sizes relate to EU?

French and Belgian band sizes are EU + 15, a fixed offset shown automatically.

Are cup letters the same everywhere?

Cup lettering varies by country and brand, so treat cup output as an approximate guide.

More Special Unit Converters

Paper Size Converter
A/B + US sizes, dimensions + visuals.
Typography Converter
pt, px, em, rem, mm, cm by DPI.
Frequency ↔ Wavelength Converter
Convert between frequency (Hz, kHz, MHz, GHz) and electromagnetic wavelength using λ = c/f with the exact speed of light.
Data Transfer Rate Converter
Convert bit/s, kbit/s, Mbit/s, Gbit/s and byte-based KB/s, MB/s, GB/s using SI decimal prefixes and the 8-bits-per-byte relation.
Angle Unit Converter
Convert degrees, radians, gradians, arcminutes, arcseconds and turns for geometry, trigonometry and navigation.
Tire Pressure Converter
Convert tire and general pressure between PSI, bar, kPa, atmospheres and mmHg (torr).
Blood Glucose Converter
Convert blood sugar readings between mg/dL and mmol/L using the standard glucose factor of 18.0182.
Color Temperature ↔ Mired Converter
Convert Kelvin color temperature to and from mireds (mired = 1,000,000 ÷ K) for photography and lighting gel calculations.
Roman Numeral Converter
Convert whole numbers (1–3999) to Roman numerals and parse Roman numerals back to integers with canonical-form validation.
Running Pace ↔ Speed Converter
Convert running pace (min/km, min/mi) to and from speed (km/h, mph) for training and race planning.
Fuel Economy Converter
Convert fuel efficiency between L/100 km, US MPG, imperial (UK) MPG and km/L.
Oven Gas Mark Converter
Convert oven gas marks (1–9) to Fahrenheit and Celsius with a full baking temperature reference table.

← View all Special Unit ConvertersBrowse all 1,100+ tools →