Real Bra Size Calculator
Bra size from two measurements, drawn to scale
Real Bra Size Calculator turns two measurements into a bra size, showing the working and a drawing of what that size typically looks like from the side and above, so the letters finally mean something. It skips the outdated "add 4 inches" rule that puts many people in the wrong band.
It sells nothing. There are no shop links, no sign-up, and your measurements stay in your browser, so the answer has no reason to steer you towards any brand. Free to use, in inches or centimetres.
Features
- Quick or detailed: two measurements for a fast answer, or six for people whose size is harder to pin down
- Drawn shapes: the side and top view of a size, drawn to scale from a model based on published research
- Sister sizes: the sizes that hold the same cup volume on a different band
- Fit check: start from the bra you already own, tick what is wrong, and get the size to try next
- Size comparison: two sizes drawn on top of each other, because a letter alone can mislead
- Breast weight estimate: from your own measurements, with the arithmetic shown
- Size converter and charts: US, UK, Australia / NZ, EU, France, Italy and Japan
Use Cases
- Measuring your bra size at home, with just a tape measure
- Checking whether the size you wear now actually fits, and what to try instead
- Converting a size between US, UK, EU, Australian and other systems
- Seeing how two sizes really differ before switching
- Finding a sister size that holds the same cup volume on a different band
Comments
Hi Fazier! I built Real Bra Size Calculator because most size calculators still add 4 inches to the band measurement, an old rule that puts a lot of people in the wrong size, and they hand you a letter without showing what it actually means. This one takes two measurements (or six, if your size is harder to pin down), shows the working, and draws the shape of the result from the side and from above, so you can see the difference between, say, a 34C and a 32D. It sells nothing, needs no sign-up, and your measurements never leave your browser. I'd love feedback: did it give you a size that matches what actually fits you? And is there anything on the drawings that's confusing?
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Comments
Hi Fazier! I built Real Bra Size Calculator because most size calculators still add 4 inches to the band measurement, an old rule that puts a lot of people in the wrong size, and they hand you a letter without showing what it actually means. This one takes two measurements (or six, if your size is harder to pin down), shows the working, and draws the shape of the result from the side and from above, so you can see the difference between, say, a 34C and a 32D. It sells nothing, needs no sign-up, and your measurements never leave your browser. I'd love feedback: did it give you a size that matches what actually fits you? And is there anything on the drawings that's confusing?
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