Women's Health
Use this exact bra size calculator to calculate estimate bra band size, cup size, full size, sister sizes, and fit guidance from band and bust measurements.
Calculator
Estimated size
US 32DD/E
Band 32, cup DD/E. Sister sizes: 30F and 34D.
Cup size is estimated from the difference between bust and adjusted band measurement. A snug fit may feel supportive, while comfort fit allows more ease.
Your measurements are processed only for calculation. Please consult a professional fitter for best sizing accuracy.
Band in inches: 32. Bust in inches: 37.
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Trust note
This calculator is informational and should be verified before financial, health, legal, engineering, laboratory, or safety-critical decisions.
Cup size = bust measurement - adjusted band measurement
This calculator applies the formula Cup size = bust measurement - adjusted band measurement. Enter each value with the matching unit, and AZCalculate updates the result instantly.
Assumptions
Avoid mistakes
Follow the reasoning, not only the final number.
Enter the known values in the calculator fields.
Starting with clearly defined values and units prevents the most common calculation errors.
Keep the units consistent with the labels shown beside each input.
This step transforms the known values into the form required by the formula.
Apply the formula: Cup size = bust measurement - adjusted band measurement.
This step transforms the known values into the form required by the formula.
Review the primary result and supporting values.
Compare the result with your real-world goal, such as estimate a starting bra size.
Worked example
Bust-band difference: 5 in
Calculator guide
Estimate bra band size, cup size, full size, sister sizes, and fit guidance from band and bust measurements. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
References
We work hard to keep every calculator accurate and useful. If you notice a calculation error, missing option, or unclear explanation, please let us know so we can review and correct it promptly.
Usage information loads after the calculator is ready.
FAQ
It uses Cup size = bust measurement - adjusted band measurement and calculates the result from the values you enter.
Yes. AZCalculate calculator pages include copy, share, and print actions.
No. They are estimates based on dates and average cycle length.
No. Speak with a qualified healthcare professional for medical concerns.
Use it as an estimate and compare it with the formula, assumptions, and examples shown on the page.
Real-world inputs can include local rules, changing rates, measurement tolerances, and conditions outside the core formula.
Enter the known values requested by the calculator. Use the unit selectors where available and make sure the values describe the same scenario.
The calculator follows the formula shown on this page. Accuracy depends on the values, units, assumptions, and rounding used in your scenario.
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